Merge pull request #3041 from proddy/core3

Core3 sync
async-validator fixes
2026-04-30 20:45:13 +00:00 · 2026-04-22 16:09:58 +02:00 · 2026-04-22 16:07:59 +02:00 · 2026-04-22 15:43:46 +02:00 · 2026-04-22 15:43:36 +02:00 · 2026-04-22 15:43:10 +02:00
50 changed files with 978 additions and 583 deletions
--- a/CHANGELOG_LATEST.md
+++ b/CHANGELOG_LATEST.md
@@ -12,6 +12,7 @@ For more details go to [emsesp.org](https://emsesp.org/).
 - prometheus metrics for temperature/analog/scheduler/custom [#2962](https://github.com/emsesp/EMS-ESP32/issues/2962)
 - boiler pumpkick [#2965](https://github.com/emsesp/EMS-ESP32/discussions/2965)
 - heatpump reset [#2933](https://github.com/emsesp/EMS-ESP32/issues/2933)
+- e-mail notification using ReadyMail Client
 - 2.nd freshwater module (dhw4, dhw5) [#2991](https://github.com/emsesp/EMS-ESP32/issues/2991)
 - full system backup and restore

@@ -31,6 +32,8 @@ For more details go to [emsesp.org](https://emsesp.org/).
 - support `minflowtemp` and `baseflowtemp` [#2969](https://github.com/emsesp/EMS-ESP32/discussions/2969)
 - update version if it is 00.00 in first read [#2981](https://github.com/emsesp/EMS-ESP32/issues/2981)
 - device class for % values [#2980](https://github.com/emsesp/EMS-ESP32/issues/2980)
+- use tasmota core 2026.03.30
+- secure mqtt uses ESP_SSLClient
 - fetch telegrams: set length to fetch [#3017](https://github.com/emsesp/EMS-ESP32/issues/3017)
 - move http client from stack to heap
 - heap optimizations [#3021](https://github.com/emsesp/EMS-ESP32/discussions/3021)
--- a/2
+++ b/2
@@ -47,7 +47,7 @@ MAKEFLAGS += -j$(JOBS) -l$(shell echo $$(($(JOBS) * 2)))
 #----------------------------------------------------------------------
 TARGET    := emsesp
 BUILD     := build
-SOURCES   := src/core src/devices src/web src/test lib_standalone lib/espMqttClient/src lib/espMqttClient/src/*         lib/ArduinoJson/src lib/uuid-common/src lib/uuid-console/src lib/uuid-log/src   lib/PButton 
+SOURCES   := src/core src/devices src/web src/test lib_standalone       lib/espMqttClient/src lib/espMqttClient/src/*         lib/ArduinoJson/src lib/uuid-common/src lib/uuid-console/src lib/uuid-log/src   lib/PButton 
 INCLUDES  := src/core src/devices src/web src/test lib_standalone lib/* lib/espMqttClient/src lib/espMqttClient/src/Transport lib/ArduinoJson/src lib/uuid-common/src lib/uuid-console/src lib/uuid-log/src   lib/uuid-telnet/src lib/uuid-syslog/src
 LIBRARIES :=

--- a/boards/c3_mini_4M.json
+++ b/boards/c3_mini_4M.json
@@ -5,7 +5,7 @@
      },
      "core": "esp32",
      "extra_flags": [
-        "-DTASMOTA_SDK",
+        "-DNO_TLS_SUPPORT",
        "-DARDUINO_LOLIN_C3_MINI",
        "-DARDUINO_USB_MODE=1",
        "-DARDUINO_USB_CDC_ON_BOOT=1"
--- a/boards/s2_4M_P.json
+++ b/boards/s2_4M_P.json
@@ -6,7 +6,7 @@
      "core": "esp32",
      "extra_flags": [
        "-DBOARD_HAS_PSRAM",
-        "-DTASMOTA_SDK",
+        "-DNO_TLS_SUPPORT",
        "-DARDUINO_USB_CDC_ON_BOOT=1",
        "-DARDUINO_USB_MODE=0"
      ],
--- a/boards/s3_32M_P.json
+++ b/boards/s3_32M_P.json
@@ -21,7 +21,7 @@
      "arduino",
      "espidf"
    ],
-    "name": "Espressif ESP32-S3 32M Flash OPI PSRAM, 4608KB Code/OTA, 2MB FS",
+    "name": "Tasmota ESP32-S3 32M Flash OPI PSRAM, 4608KB Code/OTA, 2MB FS",
    "upload": {
      "flash_size": "32MB",
      "maximum_ram_size": 327680,
--- a/boards/s_16M.json
+++ b/boards/s_16M.json
@@ -1,7 +1,7 @@
 {
    "build": {
      "core": "esp32",
-      "extra_flags": "-DTASMOTA_SDK",
+      "extra_flags": "-DNO_TLS_SUPPORT",
      "f_cpu": "240000000L",
      "f_flash": "40000000L",
      "flash_mode": "dio",
@@ -19,7 +19,7 @@
      "arduino",
      "espidf"
    ],
-    "name": "Espressif ESP32 16M Flash, 4608KB Code/OTA, 2MB FS",
+    "name": "Tasmota ESP32 16M Flash, 4608KB Code/OTA, 2MB FS",
    "upload": {
      "flash_size": "16MB",
      "maximum_ram_size": 327680,
--- a/boards/s_16M_P.json
+++ b/boards/s_16M_P.json
@@ -19,7 +19,7 @@
      "arduino",
      "espidf"
    ],
-    "name": "Espressif ESP32 16M Flash DIO PSRAM, 4608KB Code/OTA, 2MB FS",
+    "name": "Tasmota ESP32 16M Flash DIO PSRAM, 4608KB Code/OTA, 2MB FS",
    "upload": {
      "flash_size": "16MB",
      "maximum_ram_size": 327680,
--- a/boards/s_4M.json
+++ b/boards/s_4M.json
@@ -1,7 +1,7 @@
 {
    "build": {
      "core": "esp32",
-      "extra_flags": "-DTASMOTA_SDK",
+      "extra_flags": "-DNO_TLS_SUPPORT",
      "f_cpu": "240000000L",
      "f_flash": "40000000L",
      "flash_mode": "dio",
--- a/boards/seeed_xiao_esp32c6.json
+++ b/boards/seeed_xiao_esp32c6.json
@@ -2,6 +2,7 @@
  "build": {
    "core": "esp32",
    "extra_flags": [
+      "-DNO_TLS_SUPPORT",
      "-DARDUINO_XIAO_ESP32C6",
      "-DARDUINO_USB_MODE=1",
      "-DARDUINO_USB_CDC_ON_BOOT=1"
--- a/docs/dump_telegrams.csv
+++ b/docs/dump_telegrams.csv
@@ -171,7 +171,6 @@ telegram_type_id,name,is_fetched
 0x0468,HPSet, 
 0x0469,HPSet, 
 0x046A,HPSet, 
-0x0470,RC300Summer2, 
 0x0471,RC300Summer2, 
 0x0472,RC300Summer2, 
 0x0473,RC300Summer2, 
@@ -179,6 +178,7 @@ telegram_type_id,name,is_fetched
 0x0475,RC300Summer2, 
 0x0476,RC300Summer2, 
 0x0477,RC300Summer2, 
+0x0478,RC300Summer2, 
 0x047B,HP2, 
 0x0484,HPSilentMode,fetched
 0x0485,HpCooling,fetched
--- a/interface/package.json
+++ b/interface/package.json
@@ -30,7 +30,7 @@
    "@mui/material": "^9.0.0",
    "@preact/compat": "^18.3.2",
    "@table-library/react-table-library": "4.1.15",
-    "alova": "3.5.1",
+    "alova": "^3.5.1",
    "async-validator": "^4.2.5",
    "etag": "^1.8.1",
    "formidable": "^3.5.4",
@@ -64,8 +64,7 @@
    "terser": "^5.46.1",
    "typescript-eslint": "^8.59.0",
    "vite": "^8.0.9",
-    "vite-plugin-imagemin": "^0.6.1",
-    "vite-tsconfig-paths": "^6.1.1"
+    "vite-plugin-imagemin": "^0.6.1"
  },
  "packageManager": "pnpm@10.33.1+sha512.05ba3c1d5d1c18f68df06470d74055e62d41fc110a0c660db1b2dfb2785327f04cf0f68345d4609bc52089e7fa0343c31593b2f9594e2c5d5da426230acc9820"
 }
--- a/interface/pnpm-lock.yaml
+++ b/interface/pnpm-lock.yaml
@@ -30,7 +30,7 @@ importers:
        specifier: 4.1.15
        version: 4.1.15(@emotion/react@11.14.0(@types/react@19.2.14)(react@19.2.5))(react-dom@19.2.5(react@19.2.5))(react@19.2.5)
      alova:
-        specifier: 3.5.1
+        specifier: ^3.5.1
        version: 3.5.1
      async-validator:
        specifier: ^4.2.5
@@ -126,9 +126,6 @@ importers:
      vite-plugin-imagemin:
        specifier: ^0.6.1
        version: 0.6.1(vite@8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1))
-      vite-tsconfig-paths:
-        specifier: ^6.1.1
-        version: 6.1.1(typescript@6.0.3)(vite@8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1))

 packages:

@@ -1986,9 +1983,6 @@ packages:
    resolution: {integrity: sha512-7dUi7RvCoT/xast/o/dLN53oqND4yk0nsHkhRgn9w65C4PofCLOoJ39iSOg+qVDdWQPIEj+eszMHQ+aLVwwQSg==}
    engines: {node: '>=8'}

-  globrex@0.1.2:
-    resolution: {integrity: sha512-uHJgbwAMwNFf5mLst7IWLNg14x1CkeqglJb/K3doi4dw6q2IvAAmM/Y81kevy83wP+Sst+nutFTYOGg3d1lsxg==}
-
  gopd@1.2.0:
    resolution: {integrity: sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg==}
    engines: {node: '>= 0.4'}
@@ -3176,16 +3170,6 @@ packages:
    peerDependencies:
      typescript: '>=4.8.4'

-  tsconfck@3.1.6:
-    resolution: {integrity: sha512-ks6Vjr/jEw0P1gmOVwutM3B7fWxoWBL2KRDb1JfqGVawBmO5UsvmWOQFGHBPl5yxYz4eERr19E6L7NMv+Fej4w==}
-    engines: {node: ^18 || >=20}
-    hasBin: true
-    peerDependencies:
-      typescript: ^5.0.0
-    peerDependenciesMeta:
-      typescript:
-        optional: true
-
  tslib@2.8.1:
    resolution: {integrity: sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==}

@@ -3274,11 +3258,6 @@ packages:
    peerDependencies:
      vite: 5.x || 6.x || 7.x || 8.x

-  vite-tsconfig-paths@6.1.1:
-    resolution: {integrity: sha512-2cihq7zliibCCZ8P9cKJrQBkfgdvcFkOOc3Y02o3GWUDLgqjWsZudaoiuOwO/gzTzy17cS5F7ZPo4bsnS4DGkg==}
-    peerDependencies:
-      vite: '*'
-
  vite@8.0.9:
    resolution: {integrity: sha512-t7g7GVRpMXjNpa67HaVWI/8BWtdVIQPCL2WoozXXA7LBGEFK4AkkKkHx2hAQf5x1GZSlcmEDPkVLSGahxnEEZw==}
    engines: {node: ^20.19.0 || >=22.12.0}
@@ -5265,8 +5244,6 @@ snapshots:
      merge2: 1.4.1
      slash: 3.0.0

-  globrex@0.1.2: {}
-
  gopd@1.2.0: {}

  got@7.1.0:
@@ -6400,10 +6377,6 @@ snapshots:
    dependencies:
      typescript: 6.0.3

-  tsconfck@3.1.6(typescript@6.0.3):
-    optionalDependencies:
-      typescript: 6.0.3
-
  tslib@2.8.1: {}

  tunnel-agent@0.6.0:
@@ -6516,16 +6489,6 @@ snapshots:
      stack-trace: 1.0.0-pre2
      vite: 8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1)

-  vite-tsconfig-paths@6.1.1(typescript@6.0.3)(vite@8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1)):
-    dependencies:
-      debug: 4.4.3
-      globrex: 0.1.2
-      tsconfck: 3.1.6(typescript@6.0.3)
-      vite: 8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1)
-    transitivePeerDependencies:
-      - supports-color
-      - typescript
-
  vite@8.0.9(@types/node@25.6.0)(esbuild@0.27.4)(terser@5.46.1):
    dependencies:
      lightningcss: 1.32.0
--- a/interface/src/app/main/types.ts
+++ b/interface/src/app/main/types.ts
@@ -43,6 +43,16 @@ export interface Settings {
  modbus_port: number;
  modbus_max_clients: number;
  modbus_timeout: number;
+  email_enabled: boolean;
+  email_ssl?: boolean;
+  email_starttls?: boolean;
+  email_server: string;
+  email_port: number;
+  email_login: string;
+  email_pass: string;
+  email_sender: string;
+  email_recp: string;
+  email_subject: string;
  developer_mode: boolean;
 }

--- a/interface/src/app/settings/ApplicationSettings.tsx
+++ b/interface/src/app/settings/ApplicationSettings.tsx
@@ -28,6 +28,7 @@ import {
  FormLoader,
  MessageBox,
  SectionContent,
+  ValidatedPasswordField,
  ValidatedTextField,
  useLayoutTitle
 } from 'components';
@@ -351,6 +352,156 @@ const ApplicationSettings = () => {
            </Grid>
          </Grid>
        )}
+        <Typography color="secondary">eMail</Typography>
+        <BlockFormControlLabel
+          control={
+            <Checkbox
+              checked={data.email_enabled}
+              onChange={updateFormValue}
+              name="email_enabled"
+              disabled={!hardwareData.psram}
+            />
+          }
+          label={
+            <Typography color={!hardwareData.psram ? 'grey' : 'default'}>
+              Enable eMail notification
+              {!hardwareData.psram && (
+                <Typography variant="caption">
+                  &nbsp; &#40;{LL.IS_REQUIRED('PSRAM')}&#41;
+                </Typography>
+              )}
+            </Typography>
+          }
+        />
+        {data.email_enabled && (
+          <>
+            <Grid
+              container
+              spacing={2}
+              direction="row"
+              justifyContent="flex-start"
+              alignItems="flex-start"
+            >
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_server"
+                  label="SMTP Server"
+                  variant="outlined"
+                  value={data.email_server}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  sx={{ width: '12ch' }}
+                  name="email_port"
+                  variant="outlined"
+                  label="Port"
+                  value={numberValue(data.email_port)}
+                  type="number"
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+              <Grid size={4} mt={!data.email_ssl && !data.email_starttls ? 0 : 3}>
+                {!data.email_starttls && (
+                  <BlockFormControlLabel
+                    sx={{ width: '12ch' }}
+                    control={
+                      <Checkbox
+                        checked={data.email_ssl}
+                        onChange={updateFormValue}
+                        name="email_ssl"
+                        disabled={
+                          data.email_starttls || data.email_ssl === undefined
+                        }
+                      />
+                    }
+                    label="SSL/TLS"
+                  />
+                )}
+                {!data.email_ssl && (
+                  <BlockFormControlLabel
+                    sx={{ width: '12ch' }}
+                    control={
+                      <Checkbox
+                        checked={data.email_starttls}
+                        onChange={updateFormValue}
+                        name="email_starttls"
+                        disabled={
+                          data.email_ssl || data.email_starttls === undefined
+                        }
+                      />
+                    }
+                    label="STARTTLS"
+                  />
+                )}
+              </Grid>
+            </Grid>
+            <Grid container spacing={2} rowSpacing={0}>
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_login"
+                  label="Login"
+                  variant="outlined"
+                  value={data.email_login}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+              <Grid>
+                <ValidatedPasswordField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_pass"
+                  label="Password"
+                  variant="outlined"
+                  value={data.email_pass}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+            </Grid>
+            <Grid container spacing={2} rowSpacing={0}>
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_sender"
+                  label="From"
+                  variant="outlined"
+                  value={data.email_sender}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_recp"
+                  label="To"
+                  variant="outlined"
+                  value={data.email_recp}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+              <Grid>
+                <ValidatedTextField
+                  fieldErrors={fieldErrors || {}}
+                  name="email_subject"
+                  label="Subject"
+                  variant="outlined"
+                  value={data.email_subject}
+                  onChange={updateFormValue}
+                  margin="normal"
+                />
+              </Grid>
+            </Grid>
+          </>
+        )}
        <Typography sx={{ pb: 1, pt: 2 }} variant="h6" color="primary">
          {LL.SENSORS()}
        </Typography>
--- a/interface/src/app/status/Version.tsx
+++ b/interface/src/app/status/Version.tsx
@@ -315,22 +315,13 @@ const InstallDialog = memo(
              fetchDevVersion ? latestDevVersion?.name : latestVersion?.name
            )}
          </Typography>
+
+          {upgradeImportantMessageType === 1 && LL.UPGRADE_IMPORTANT_MESSAGES_1()}
          {upgradeImportantMessageType === 2 && LL.UPGRADE_IMPORTANT_MESSAGES_2()}
-          {upgradeImportantMessageType === 1 && (
-            <>
-              {LL.UPGRADE_IMPORTANT_MESSAGES_1()}
-              <Typography sx={{ mt: 2 }}>
-                <Link to="/settings/downloadUpload" style={{ color: 'lightblue' }}>
-                  {LL.DOWNLOAD_SYSTEM_BACKUP()}
-                </Link>
-              </Typography>
-            </>
-          )}
          <Typography sx={{ mt: 2 }}>
            <Link
-              to="https://docs.emsesp.org/FAQ#upgrading-the-firmware"
              target="_blank"
-              rel="noreferrer"
+              to="https://docs.emsesp.org/FAQ#upgrading-the-firmware"
              style={{ color: 'lightblue' }}
            >
              {LL.ONLINE_HELP()}
--- a/lib/espMqttClient/src/Config.h
+++ b/lib/espMqttClient/src/Config.h
@@ -49,6 +49,10 @@ the LICENSE file.
 #define EMC_CLIENTID_LENGTH 23 + 1
 #endif

+#ifdef EMSESP_MQTT_STACKSIZE
+#define EMC_TASK_STACK_SIZE EMSESP_MQTT_STACKSIZE
+#endif
+
 #ifndef EMC_TASK_STACK_SIZE
 #define EMC_TASK_STACK_SIZE 5120
 #endif
@@ -66,14 +70,10 @@ the LICENSE file.
 #endif

 #if EMC_USE_MEMPOOL
-  #ifndef EMC_NUM_POOL_ELEMENTS
-    #define EMC_NUM_POOL_ELEMENTS 32
-  #endif
-  #ifndef EMC_SIZE_POOL_ELEMENTS
-    #define EMC_SIZE_POOL_ELEMENTS 128
-  #endif
+#ifndef EMC_NUM_POOL_ELEMENTS
+#define EMC_NUM_POOL_ELEMENTS 32
+#endif
+#ifndef EMC_SIZE_POOL_ELEMENTS
+#define EMC_SIZE_POOL_ELEMENTS 128
 #endif
-
-#ifndef  TASMOTA_SDK
-#define EMC_CLIENT_SECURE
 #endif
--- a/lib/espMqttClient/src/MqttClient.cpp
+++ b/lib/espMqttClient/src/MqttClient.cpp
@@ -62,7 +62,11 @@ MqttClient::MqttClient(espMqttClientTypes::UseInternalTask useInternalTask, uint
  _xSemaphore = xSemaphoreCreateMutex();
  EMC_SEMAPHORE_GIVE();  // release before first use
  if (_useInternalTask == espMqttClientTypes::UseInternalTask::YES) {
-    xTaskCreatePinnedToCore((TaskFunction_t)_loop, "mqttclient", EMC_TASK_STACK_SIZE, this, priority, &_taskHandle, core);
+    if (core > 1) {
+      xTaskCreate((TaskFunction_t)_loop, "mqttclient", EMC_TASK_STACK_SIZE, this, priority, &_taskHandle);
+    } else {
+      xTaskCreatePinnedToCore((TaskFunction_t)_loop, "mqttclient", EMC_TASK_STACK_SIZE, this, priority, &_taskHandle, core);
+    }
  }
 #else
  (void) useInternalTask;
@@ -70,6 +74,7 @@ MqttClient::MqttClient(espMqttClientTypes::UseInternalTask useInternalTask, uint
  (void) core;
 #endif
  _clientId = _generatedClientId;
+  _core = core;
 }

 MqttClient::~MqttClient() {
--- a/lib/espMqttClient/src/MqttClient.h
+++ b/lib/espMqttClient/src/MqttClient.h
@@ -69,7 +69,17 @@ class MqttClient {
  const char* getClientId() const;
  size_t queueSize();  // No const because of mutex
  void loop();
-
+  uint32_t stack() {
+#ifndef EMSESP_STANDALONE
+   return uxTaskGetStackHighWaterMark(_taskHandle);
+#else
+    return 0;
+#endif
+  }
+  uint8_t core() {
+   return  _core;
+  }
+    
 protected:
  explicit MqttClient(espMqttClientTypes::UseInternalTask useInternalTask, uint8_t priority = 1, uint8_t core = 1);
  espMqttClientTypes::UseInternalTask _useInternalTask;
@@ -98,6 +108,7 @@ class MqttClient {
  uint8_t _willQos;
  bool _willRetain;
  uint32_t _timeout;
+  uint8_t _core;

  // state is protected to allow state changes by the transport system, defined in child classes
  // eg. to allow AsyncTCP
--- a/lib/espMqttClient/src/Transport/ClientPosix.cpp
+++ b/lib/espMqttClient/src/Transport/ClientPosix.cpp
@@ -8,7 +8,7 @@ the LICENSE file.

 #include "ClientPosix.h"

-#if defined(__linux__)
+#if defined(__linux__) || defined(__APPLE__)

 namespace espMqttClientInternals {

--- a/lib/espMqttClient/src/Transport/ClientPosix.h
+++ b/lib/espMqttClient/src/Transport/ClientPosix.h
@@ -8,7 +8,7 @@ the LICENSE file.

 #pragma once

-#if defined(__linux__)
+#if defined(__linux__) || defined(__APPLE__)

 #include <stdio.h>
 #include <stdlib.h>
--- a/lib/espMqttClient/src/Transport/ClientSecureSync.cpp
+++ b/lib/espMqttClient/src/Transport/ClientSecureSync.cpp
@@ -6,66 +6,65 @@ For a copy, see <https://opensource.org/licenses/MIT> or
 the LICENSE file.
 */

-#if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
+#ifndef NO_TLS_SUPPORT

 #include "ClientSecureSync.h"
-#include <lwip/sockets.h>  // socket options
+#include <lwip/sockets.h>
+#include "../Config.h"

 namespace espMqttClientInternals {

 ClientSecureSync::ClientSecureSync()
-: client() {
-  // empty
+    : client() {
+    client.setClient(&basic_client, true);
+    client.setBufferSizes(EMC_RX_BUFFER_SIZE, EMC_TX_BUFFER_SIZE);
+    client.setSessionTimeout(120); // Set the timeout in seconds (>=120 seconds)
+}
+
+ClientSecureSync::~ClientSecureSync() {
+    stop();
 }

 bool ClientSecureSync::connect(IPAddress ip, uint16_t port) {
-  bool ret = client.connect(ip, port);  // implicit conversion of return code int --> bool
-  if (ret) {
-    #if defined(ARDUINO_ARCH_ESP8266)
-    client.setNoDelay(true);
-    #elif defined(ARDUINO_ARCH_ESP32)
-    // Set TCP option directly to bypass lack of working setNoDelay for WiFiClientSecure
-    int val = true;
-    client.setSocketOption(IPPROTO_TCP, TCP_NODELAY, &val, sizeof(int));
-    #endif
-  }
-  return ret;
+    bool ret = client.connect(ip, port); // implicit conversion of return code int --> bool
+    if (ret) {
+        // Set TCP option directly to bypass lack of working setNoDelay for WiFiClientSecure
+        int val = true;
+        basic_client.setSocketOption(IPPROTO_TCP, TCP_NODELAY, &val, sizeof(int));
+    }
+    return ret;
 }

-bool ClientSecureSync::connect(const char* host, uint16_t port) {
-  bool ret = client.connect(host, port);  // implicit conversion of return code int --> bool
-  if (ret) {
-    #if defined(ARDUINO_ARCH_ESP8266)
-    client.setNoDelay(true);
-    #elif defined(ARDUINO_ARCH_ESP32)
-    // Set TCP option directly to bypass lack of working setNoDelay for WiFiClientSecure
-    int val = true;
-    client.setSocketOption(IPPROTO_TCP, TCP_NODELAY, &val, sizeof(int));
-    #endif
-  }
-  return ret;
+bool ClientSecureSync::connect(const char * host, uint16_t port) {
+    bool ret = client.connect(host, port); // implicit conversion of return code int --> bool
+    if (ret) {
+        // Set TCP option directly to bypass lack of working setNoDelay for WiFiClientSecure
+        int val = true;
+        basic_client.setSocketOption(IPPROTO_TCP, TCP_NODELAY, &val, sizeof(int));
+    }
+    return ret;
 }

-size_t ClientSecureSync::write(const uint8_t* buf, size_t size) {
-  return client.write(buf, size);
+size_t ClientSecureSync::write(const uint8_t * buf, size_t size) {
+    return client.write(buf, size);
 }

-int ClientSecureSync::read(uint8_t* buf, size_t size) {
-  return client.read(buf, size);
+int ClientSecureSync::read(uint8_t * buf, size_t size) {
+    return client.read(buf, size);
 }

 void ClientSecureSync::stop() {
-  client.stop();
+    client.stop();
 }

 bool ClientSecureSync::connected() {
-  return client.connected();
+    return client.connected();
 }

 bool ClientSecureSync::disconnected() {
-  return !client.connected();
+    return !client.connected();
 }

-}  // namespace espMqttClientInternals
+} // namespace espMqttClientInternals

-#endif
+#endif
--- a/lib/espMqttClient/src/Transport/ClientSecureSync.h
+++ b/lib/espMqttClient/src/Transport/ClientSecureSync.h
@@ -8,15 +8,11 @@ the LICENSE file.

 #pragma once

-#if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
+#ifndef NO_TLS_SUPPORT

-// Added for EMS-ESP
-#include "../Config.h"
-#if defined(EMC_CLIENT_SECURE)
-#include <WiFiClientSecure.h> // includes IPAddress
-#else
+// #include "esp_tls.h"
 #include <WiFiClient.h>
-#endif
+#include <ESP_SSLClient.h>
 #include "Transport.h"

 namespace espMqttClientInternals {
@@ -24,6 +20,7 @@ namespace espMqttClientInternals {
 class ClientSecureSync : public Transport {
  public:
    ClientSecureSync();
+    ~ClientSecureSync();
    bool   connect(IPAddress ip, uint16_t port) override;
    bool   connect(const char * host, uint16_t port) override;
    size_t write(const uint8_t * buf, size_t size) override;
@@ -31,14 +28,11 @@ class ClientSecureSync : public Transport {
    void   stop() override;
    bool   connected() override;
    bool   disconnected() override;
-    // added for EMS-ESP
-#if defined(EMC_CLIENT_SECURE)
-    WiFiClientSecure client;
-#else
-    WiFiClient client;
-#endif
+
+    WiFiClient    basic_client;
+    ESP_SSLClient client;
 };

 } // namespace espMqttClientInternals

-#endif
+#endif
--- a/lib/espMqttClient/src/espMqttClient.cpp
+++ b/lib/espMqttClient/src/espMqttClient.cpp
@@ -8,50 +8,6 @@ the LICENSE file.

 #include "espMqttClient.h"

-#if defined(ARDUINO_ARCH_ESP8266)
-espMqttClient::espMqttClient()
-    : MqttClientSetup(espMqttClientTypes::UseInternalTask::NO)
-    , _client() {
-    _transport = &_client;
-}
-
-espMqttClientSecure::espMqttClientSecure()
-    : MqttClientSetup(espMqttClientTypes::UseInternalTask::NO)
-    , _client() {
-    _transport = &_client;
-}
-
-espMqttClientSecure & espMqttClientSecure::setInsecure() {
-    _client.client.setInsecure();
-    return *this;
-}
-
-espMqttClientSecure & espMqttClientSecure::setFingerprint(const uint8_t fingerprint[20]) {
-    _client.client.setFingerprint(fingerprint);
-    return *this;
-}
-
-espMqttClientSecure & espMqttClientSecure::setTrustAnchors(const X509List * ta) {
-    _client.client.setTrustAnchors(ta);
-    return *this;
-}
-
-espMqttClientSecure & espMqttClientSecure::setClientRSACert(const X509List * cert, const PrivateKey * sk) {
-    _client.client.setClientRSACert(cert, sk);
-    return *this;
-}
-
-espMqttClientSecure & espMqttClientSecure::setClientECCert(const X509List * cert, const PrivateKey * sk, unsigned allowed_usages, unsigned cert_issuer_key_type) {
-    _client.client.setClientECCert(cert, sk, allowed_usages, cert_issuer_key_type);
-    return *this;
-}
-
-espMqttClientSecure & espMqttClientSecure::setCertStore(CertStoreBase * certStore) {
-    _client.client.setCertStore(certStore);
-    return *this;
-}
-#endif
-
 #if defined(ARDUINO_ARCH_ESP32)
 espMqttClient::espMqttClient(espMqttClientTypes::UseInternalTask useInternalTask)
    : MqttClientSetup(useInternalTask)
@@ -78,51 +34,45 @@ espMqttClientSecure::espMqttClientSecure(uint8_t priority, uint8_t core)
 }

 espMqttClientSecure & espMqttClientSecure::setInsecure() {
-#if defined(EMC_CLIENT_SECURE)
+#ifndef NO_TLS_SUPPORT
    _client.client.setInsecure();
 #endif
    return *this;
 }

 espMqttClientSecure & espMqttClientSecure::setCACert(const char * rootCA) {
-#if defined(EMC_CLIENT_SECURE)
+#ifndef NO_TLS_SUPPORT
    _client.client.setCACert(rootCA);
 #endif
    return *this;
 }

 espMqttClientSecure & espMqttClientSecure::setCertificate(const char * clientCa) {
-#if defined(EMC_CLIENT_SECURE)
+#ifndef NO_TLS_SUPPORT
    _client.client.setCertificate(clientCa);
 #endif
    return *this;
 }

 espMqttClientSecure & espMqttClientSecure::setPrivateKey(const char * privateKey) {
-#if defined(EMC_CLIENT_SECURE)
+#ifndef NO_TLS_SUPPORT
    _client.client.setPrivateKey(privateKey);
 #endif
    return *this;
 }

 espMqttClientSecure & espMqttClientSecure::setPreSharedKey(const char * pskIdent, const char * psKey) {
-#if defined(EMC_CLIENT_SECURE)
-    _client.client.setPreSharedKey(pskIdent, psKey);
+#ifndef NO_TLS_SUPPORT
 #endif
    return *this;
 }

 #endif

-#if defined(__linux__)
+#if defined(__linux__) || defined(__APPLE__)
 espMqttClient::espMqttClient()
    : MqttClientSetup(espMqttClientTypes::UseInternalTask::NO)
    , _client() {
    _transport = &_client;
 }
-#elif defined(_WIN32) || defined(__APPLE__)
-// Windows
-espMqttClient::espMqttClient()
-    : MqttClientSetup(espMqttClientTypes::UseInternalTask::NO) {
-}
 #endif
--- a/lib/espMqttClient/src/espMqttClient.h
+++ b/lib/espMqttClient/src/espMqttClient.h
@@ -14,7 +14,7 @@ the LICENSE file.
 #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
 #include "Transport/ClientSync.h"
 #include "Transport/ClientSecureSync.h"
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__APPLE__)
 #include "Transport/ClientPosix.h"
 #endif

@@ -65,10 +65,16 @@ class espMqttClientSecure : public MqttClientSetup<espMqttClientSecure> {
    espMqttClientSecure & setPreSharedKey(const char * pskIdent, const char * psKey);

  protected:
+#ifndef NO_TLS_SUPPORT
    espMqttClientInternals::ClientSecureSync _client;
+#else
+    espMqttClientInternals::ClientSync _client;
+#endif
 };

-#elif defined(__linux__)
+#endif
+
+#if defined(__linux__) || defined(__APPLE__)
 class espMqttClient : public MqttClientSetup<espMqttClient> {
  public:
    espMqttClient();
@@ -76,10 +82,4 @@ class espMqttClient : public MqttClientSetup<espMqttClient> {
  protected:
    espMqttClientInternals::ClientPosix _client;
 };
-#elif defined(_WIN32) || defined(__APPLE__)
-class espMqttClient : public MqttClientSetup<espMqttClient> {
-  public:
-    espMqttClient();
-};
-
 #endif
--- a/platformio.ini
+++ b/platformio.ini
@@ -21,7 +21,7 @@ extra_configs =
  pio_local.ini

 [common]
-core_build_flags = -std=gnu++2a -O3 -flto=auto -Wno-type-limits -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -Wno-format -Wno-missing-field-initializers
+core_build_flags = -std=gnu++20 -O3 -flto=auto -Wno-type-limits -Wall -Wextra -Wno-unused-parameter -Wno-unused-variable -Wno-format -Wno-missing-field-initializers
 core_unbuild_flags = -std=gnu++11 -std=gnu++14 -std=gnu++17 -fno-lto

 my_build_flags =
@@ -53,13 +53,21 @@ build_flags =
 unbuild_flags =
  ${common.core_unbuild_flags}

+; 4MB Flash variants
+[espressif32_base_4M]
+framework = arduino
+board_build.partitions = partitions/esp32_partition_4M.csv
+board_upload.flash_size = 4MB
+board_build.app_partition_name = app0
+platform = https://github.com/tasmota/platform-espressif32/releases/download/2026.04.50/platform-espressif32.zip ; Platform 2026.04.50 Tasmota Arduino Core 3.3.8 based on IDF 5.5.4.260407
+
 ; 16MB Flash variants
 [espressif32_base_16M]
 framework = arduino
 board_build.partitions = partitions/esp32_partition_16M.csv
 board_upload.flash_size = 16MB
 board_build.app_partition_name = app0
-platform = espressif32@6.13.0 ; Arduino Core 2.0.17 / IDF 4.4.7
+platform = https://github.com/tasmota/platform-espressif32/releases/download/2026.04.50/platform-espressif32.zip ; Platform 2026.04.50 Tasmota Arduino Core 3.3.8 based on IDF 5.5.4.260407

 ; 32MB Flash variants
 [espressif32_base_32M]
@@ -67,29 +75,7 @@ framework = arduino
 board_build.partitions = partitions/esp32_partition_32M.csv
 board_upload.flash_size = 32MB
 board_build.app_partition_name = app0
-platform = espressif32@6.13.0 ; Arduino Core 2.0.17 / IDF 4.4.7
-
-; use Tasmota's library for 4MB Flash variants.
-; Removes libs (like mbedtsl, so no WiFi_secure.h) to increase available heap
-[espressif32_base_T_4M]
-framework = arduino
-board_build.partitions = partitions/esp32_partition_4M.csv
-board_upload.flash_size = 4MB
-board_build.app_partition_name = app0
-platform = https://github.com/tasmota/platform-espressif32/releases/download/2024.06.00/platform-espressif32.zip  ; Arduino Core 2.0.18 with IPv6 support, based on IDF 4.4.8
-; Tasmota Arduino Core 3.1.3.250302 based on IDF 5.3.2.250228
-; platform = https://github.com/tasmota/platform-espressif32/releases/download/2025.03.30/platform-espressif32.zip
-
-; use Tasmota's library for 16MB Flash variants.
-; Removes libs (like mbedtsl, so no WiFi_secure.h) to increase available heap
-[espressif32_base_T_16M]
-framework = arduino
-board_build.partitions = partitions/esp32_partition_16M.csv
-board_upload.flash_size = 16MB
-board_build.app_partition_name = app0
-platform = https://github.com/tasmota/platform-espressif32/releases/download/2024.06.00/platform-espressif32.zip ; Arduino Core 2.0.18 with IPv6 support, based on IDF 4.4.8
-; Tasmota Arduino Core 3.1.3.250302 based on IDF 5.3.2.250228
-; platform = https://github.com/tasmota/platform-espressif32/releases/download/2025.03.30/platform-espressif32.zip
+platform = https://github.com/tasmota/platform-espressif32/releases/download/2026.04.50/platform-espressif32.zip ; Platform 2026.04.50 Tasmota Arduino Core 3.3.8 based on IDF 5.5.4.260407

 [env]
 build_flags =
@@ -106,6 +92,8 @@ lib_deps =
  bblanchon/ArduinoJson @ 7.4.3
  ESP32Async/AsyncTCP @ 3.4.10
  ESP32Async/ESPAsyncWebServer @ 3.10.3
+  https://github.com/mobizt/ReadyMail.git @ 0.4.0
+  https://github.com/mobizt/ESP_SSLClient.git @ 3.1.3
  ; https://github.com/emsesp/EMS-ESP-Modules.git @ 1.0.8

 ; builds the web interface only, not the firmware
@@ -118,18 +106,17 @@ build_src_filter = -<*>

 ;
 ; Builds for different board types
-; We use Tasmota for boards without PSRAM as this framework has mbedtls removed to save memory.
 ; If you're building for a single target environment, we recommend creating a pio_local.ini (see example file)
 ;

 [env:s_4M]
-; 4MB ESP32 - no SSL, no PSRAM - like a BBQKees older S32 and E32 models - uses Tasmota
-extends = espressif32_base_T_4M
+; 4MB ESP32 - no SSL, no PSRAM - like a BBQKees older S32 and E32 models
+extends = espressif32_base_4M
 board = s_4M

 [env:s_16M]
-; 16MB ESP32 - no PSRAM - like a BBQKees later S32 V2 models - uses Tasmota
-extends = espressif32_base_T_16M
+; 16MB ESP32 - no PSRAM - like a BBQKees later S32 V2 models
+extends = espressif32_base_16M
 board = s_16M

 [env:s_16M_P]
@@ -148,24 +135,30 @@ extends = espressif32_base_32M
 board = s3_32M_P

 [env:s2_4M_P]
-; based on lolin_s2_mini 4MB with 2MB PSRAM - uses Tasmota
-extends = espressif32_base_T_4M
+; based on lolin_s2_mini 4MB with 2MB PSRAM
+extends = espressif32_base_4M
 board = s2_4M_P

 [env:c3_mini_4M]
-; based on lolin_c3_mini 4MB, no PSRAM - uses Tasmota
-extends = espressif32_base_T_4M
+; based on lolin_c3_mini 4MB, no PSRAM
+extends = espressif32_base_4M
 board = c3_mini_4M

 ; lolin C3 mini v1 needs special wifi initialization
 ; https://www.wemos.cc/en/latest/c3/c3_mini_1_0_0.html#about-wifi
 [env:c3_miniv1_4M]
-extends = espressif32_base_T_4M
+extends = espressif32_base_4M
 board = c3_mini_4M
 build_flags =
  ${common.build_flags}
  -DBOARD_C3_MINI_V1

+; XIAO ESP32C - 512KB SRAM & 4MB Flash - https://wiki.seeedstudio.com/xiao_esp32c6_getting_started/
+[env:c6_xiao_4M]
+extends = espressif32_base_4M
+board_build.app_partition_name = app0
+board = seeed_xiao_esp32c6
+
 ; foundation for building and testing natively, standalone without an ESP32
 ; use the `standalone` environment instead of `native` for testing
 [env:native]
@@ -175,7 +168,8 @@ build_flags =
 build_src_flags =
  -DEMSESP_STANDALONE -DEMSESP_TEST
  -DARDUINOJSON_ENABLE_ARDUINO_STRING=1
-  -std=gnu++2a -Og -ggdb
+  -DNO_TLS_SUPPORT
+  -std=gnu++20 -Og -ggdb
  -Wall -Wextra
  -Wno-unused-parameter -Wno-sign-compare -Wno-missing-braces
  -Wno-vla-cxx-extension -Wno-tautological-constant-out-of-range-compare
@@ -213,8 +207,9 @@ build_src_flags =
  -DEMSESP_STANDALONE -DEMSESP_TEST
  -DEMSESP_UNITY
  -DARDUINOJSON_ENABLE_ARDUINO_STRING=1
+  -DNO_TLS_SUPPORT
  -DEMSESP_DEFAULT_LOCALE=\"en\" -DEMSESP_DEFAULT_BOARD_PROFILE=\"S32\"
-  -std=gnu++2a -Og -ggdb
+  -std=gnu++20 -Og -ggdb
  -Wall -Wextra
  -Wno-unused-parameter -Wno-sign-compare -Wno-missing-braces
  -Wno-vla-cxx-extension -Wno-tautological-constant-out-of-range-compare
--- a/src/ESP32React/APSettingsService.cpp
+++ b/src/ESP32React/APSettingsService.cpp
@@ -10,7 +10,6 @@ APSettingsService::APSettingsService(AsyncWebServer * server, FS * fs, SecurityM
    , _reconfigureAp(false)
    , _connected(0) {
    addUpdateHandler([this] { reconfigureAP(); }, false);
-    WiFi.onEvent([this](WiFiEvent_t event, WiFiEventInfo_t info) { WiFiEvent(event); });
 }

 void APSettingsService::begin() {
@@ -19,39 +18,27 @@ void APSettingsService::begin() {
    // reconfigureAP();
 }

-// wait 10 sec on STA disconnect before starting AP
-void APSettingsService::WiFiEvent(WiFiEvent_t event) {
-    const uint8_t was_connected = _connected;
-    switch (event) {
-    case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
-        _connected &= ~1U;
-        break;
-    case ARDUINO_EVENT_ETH_DISCONNECTED:
-        _connected &= ~2U;
-        break;
-    case ARDUINO_EVENT_WIFI_STA_GOT_IP:
-    case ARDUINO_EVENT_WIFI_STA_GOT_IP6:
-        _connected |= 1U;
-        break;
-    case ARDUINO_EVENT_ETH_GOT_IP:
-    case ARDUINO_EVENT_ETH_GOT_IP6:
-        _connected |= 2U;
-        break;
-    default:
-        return;
-    }
-    // wait 10 sec before starting AP
-    if (was_connected && !_connected) {
-        _lastManaged = uuid::get_uptime();
-    }
-}
-
 void APSettingsService::reconfigureAP() {
    _lastManaged   = uuid::get_uptime() - MANAGE_NETWORK_DELAY;
    _reconfigureAp = true;
 }

 void APSettingsService::loop() {
+    const uint8_t was_connected = _connected;
+    if (WiFi.isConnected()) {
+        _connected |= 1U;
+    } else {
+        _connected &= ~1U;
+    }
+    if (ETH.connected()) {
+        _connected |= 2U;
+    } else {
+        _connected &= ~2U;
+    }
+    // wait 10 sec before starting AP
+    if (was_connected && !_connected) {
+        _lastManaged = uuid::get_uptime();
+    }
    const unsigned long currentMillis = uuid::get_uptime();
    if ((currentMillis - _lastManaged) >= MANAGE_NETWORK_DELAY) {
        _lastManaged = currentMillis;
@@ -76,11 +63,7 @@ void APSettingsService::manageAP() {
 }

 void APSettingsService::startAP() {
-#if ESP_IDF_VERSION_MAJOR < 5
-    WiFi.softAPenableIpV6(); // force IPV6, same as for WiFi - fixes https://github.com/emsesp/EMS-ESP32/issues/1922
-#else
    WiFi.softAPenableIPv6(); // force IPV6, same as for WiFi - fixes https://github.com/emsesp/EMS-ESP32/issues/1922
-#endif
    WiFi.softAPConfig(_state.localIP, _state.gatewayIP, _state.subnetMask);
    esp_wifi_set_bandwidth(static_cast<wifi_interface_t>(ESP_IF_WIFI_AP), WIFI_BW_HT20);
    WiFi.softAP(_state.ssid.c_str(), _state.password.c_str(), _state.channel, _state.ssidHidden, _state.maxClients);
--- a/src/ESP32React/APSettingsService.h
+++ b/src/ESP32React/APSettingsService.h
@@ -104,7 +104,6 @@ class APSettingsService : public StatefulService<APSettings> {
    void startAP();
    void stopAP();
    void handleDNS();
-    void WiFiEvent(WiFiEvent_t event);
 };

 #endif
--- a/src/ESP32React/ESP32React.cpp
+++ b/src/ESP32React/ESP32React.cpp
@@ -6,7 +6,7 @@

 static constexpr const char CACHE_CONTROL[] = "public,max-age=60";

-// Single static-content handler serving all assets embedded in WWWData.h.
+// Single static-content handler serving all assets embedded in WWWData.h
 class StaticContentHandler : public AsyncWebHandler {
  public:
    bool canHandle(AsyncWebServerRequest * request) const override {
@@ -15,8 +15,7 @@ class StaticContentHandler : public AsyncWebHandler {
    }

    void handleRequest(AsyncWebServerRequest * request) override {
-        // OPTIONS is handled generically - the server-level CORS headers are
-        // attached via DefaultHeaders in ESP32React::begin().
+        // OPTIONS is handled generically - the server-level CORS headers are attached via DefaultHeaders in ESP32React::begin().
        if (request->method() == HTTP_OPTIONS) {
            request->send(200);
            return;
@@ -57,8 +56,7 @@ class StaticContentHandler : public AsyncWebHandler {
    }

    // Returns the /index.html asset, used as the SPA fallback for any GET
-    // that didn't match an embedded asset (React Router handles routing on
-    // the client side).
+    // that didn't match an embedded asset (React Router handles routing on the client side).
    static const WWWAsset * index_asset() {
        static const WWWAsset * cached = nullptr;
        if (cached == nullptr) {
@@ -106,4 +104,5 @@ void ESP32React::loop() {
    _networkSettingsService.loop();
    _apSettingsService.loop();
    _mqttSettingsService.loop();
+    _ntpSettingsService.loop();
 }
--- a/src/ESP32React/MqttSettingsService.cpp
+++ b/src/ESP32React/MqttSettingsService.cpp
@@ -9,7 +9,6 @@ MqttSettingsService::MqttSettingsService(AsyncWebServer * server, FS * fs, Secur
    , _disconnectedAt(0)
    , _disconnectReason(espMqttClientTypes::DisconnectReason::TCP_DISCONNECTED)
    , _mqttClient(nullptr) {
-    WiFi.onEvent([this](WiFiEvent_t event, WiFiEventInfo_t info) { WiFiEvent(event); });
    addUpdateHandler([this] { onConfigUpdated(); }, false);
 }

@@ -29,6 +28,7 @@ MqttSettingsService::~MqttSettingsService() {
 void MqttSettingsService::begin() {
    _fsPersistence.readFromFS();
    startClient();
+    _reconfigureMqtt = true;
 }

 void MqttSettingsService::startClient() {
@@ -41,7 +41,7 @@ void MqttSettingsService::startClient() {
        delete _mqttClient;
        _mqttClient = nullptr;
    }
-#ifndef TASMOTA_SDK
+#ifndef NO_TLS_SUPPORT
    if (_state.enableTLS) {
        isSecure = true;
        if (emsesp::EMSESP::system_.PSram() == 0) {
@@ -79,6 +79,10 @@ void MqttSettingsService::startClient() {
 }

 void MqttSettingsService::loop() {
+    if (_state.enabled && _mqttClient && _mqttClient->connected() && !emsesp::EMSESP::system_.network_connected()) {
+        // emsesp::EMSESP::logger().info("Network connection dropped, stopping MQTT client");
+        _mqttClient->disconnect(true);
+    }
    if (_reconfigureMqtt || (_disconnectedAt && static_cast<uint32_t>(uuid::get_uptime() - _disconnectedAt) >= MQTT_RECONNECTION_DELAY)) {
        // reconfigure MQTT client
        _disconnectedAt  = configureMqtt() ? 0 : uuid::get_uptime();
@@ -142,28 +146,6 @@ void MqttSettingsService::onConfigUpdated() {
    emsesp::EMSESP::mqtt_.start(); // reload EMS-ESP MQTT settings
 }

-void MqttSettingsService::WiFiEvent(WiFiEvent_t event) {
-    switch (event) {
-    case ARDUINO_EVENT_WIFI_STA_GOT_IP:
-    case ARDUINO_EVENT_ETH_GOT_IP:
-    case ARDUINO_EVENT_ETH_GOT_IP6:
-    case ARDUINO_EVENT_WIFI_STA_GOT_IP6:
-        if (_state.enabled && !_mqttClient->connected()) {
-            onConfigUpdated();
-        }
-        break;
-    case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
-    case ARDUINO_EVENT_ETH_DISCONNECTED:
-        if (_state.enabled) {
-            _mqttClient->disconnect(true);
-        }
-        break;
-
-    default:
-        break;
-    }
-}
-
 bool MqttSettingsService::configureMqtt() {
    // disconnect if already connected
    if (_mqttClient->connected()) {
@@ -182,7 +164,7 @@ bool MqttSettingsService::configureMqtt() {
        }

        _reconfigureMqtt = false;
-#ifndef TASMOTA_SDK
+#ifndef NO_TLS_SUPPORT
        if (_state.enableTLS) {
            if (_state.rootCA == "insecure") {
                emsesp::EMSESP::logger().debug("Start insecure MQTT");
@@ -219,7 +201,7 @@ bool MqttSettingsService::configureMqtt() {
 }

 void MqttSettings::read(MqttSettings & settings, JsonObject root) {
-#ifndef TASMOTA_SDK
+#ifndef NO_TLS_SUPPORT
    root["enableTLS"] = settings.enableTLS;
    root["rootCA"]    = settings.rootCA;
 #endif
@@ -258,7 +240,7 @@ StateUpdateResult MqttSettings::update(JsonObject root, MqttSettings & settings)
    MqttSettings newSettings;
    bool         changed = false;

-#ifndef TASMOTA_SDK
+#ifndef NO_TLS_SUPPORT
    newSettings.enableTLS = root["enableTLS"];
    newSettings.rootCA    = root["rootCA"] | "";
 #else
@@ -389,7 +371,7 @@ StateUpdateResult MqttSettings::update(JsonObject root, MqttSettings & settings)
        emsesp::EMSESP::mqtt_.set_publish_time_heartbeat(newSettings.publish_time_heartbeat);
    }

-#ifndef TASMOTA_SDK
+#ifndef NO_TLS_SUPPORT
    // strip down to certificate only
    newSettings.rootCA.replace("\r", "");
    newSettings.rootCA.replace("\n", "");
--- a/src/ESP32React/MqttSettingsService.h
+++ b/src/ESP32React/MqttSettingsService.h
@@ -134,7 +134,6 @@ class MqttSettingsService : public StatefulService<MqttSettings> {
    // the MQTT client instance
    MqttClient * _mqttClient;

-    void WiFiEvent(WiFiEvent_t event);
    void onMqttConnect(bool sessionPresent);
    void onMqttDisconnect(espMqttClientTypes::DisconnectReason reason);
    void
--- a/src/ESP32React/NTPSettingsService.cpp
+++ b/src/ESP32React/NTPSettingsService.cpp
@@ -11,36 +11,17 @@ NTPSettingsService::NTPSettingsService(AsyncWebServer * server, FS * fs, Securit
        configureTime(request, json);
    });

-    WiFi.onEvent([this](WiFiEvent_t event, WiFiEventInfo_t info) { WiFiEvent(event); });
    addUpdateHandler([this] { configureNTP(); }, false);
 }

 void NTPSettingsService::begin() {
    _fsPersistence.readFromFS();
-    configureNTP();
 }

-// handles both WiFI and Ethernet
-void NTPSettingsService::WiFiEvent(WiFiEvent_t event) {
-    switch (event) {
-    case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
-    case ARDUINO_EVENT_ETH_DISCONNECTED:
-        if (_connected && emsesp::EMSESP::system_.ntp_connected()) {
-            emsesp::EMSESP::logger().info("WiFi connection dropped, stopping NTP");
-            _connected = false;
-            configureNTP();
-        }
-        break;
-
-    case ARDUINO_EVENT_WIFI_STA_GOT_IP:
-    case ARDUINO_EVENT_ETH_GOT_IP:
-        // emsesp::EMSESP::logger().info("Got IP address, starting NTP synchronization");
-        _connected = true;
+void NTPSettingsService::loop() {
+    if (_connected != emsesp::EMSESP::system_.network_connected()) {
+        _connected = emsesp::EMSESP::system_.network_connected();
        configureNTP();
-        break;
-
-    default:
-        break;
    }
 }

@@ -55,7 +36,9 @@ void NTPSettingsService::configureNTP() {
    } else {
        setenv("TZ", _state.tzFormat.c_str(), 1);
        tzset();
-        esp_sntp_stop();
+        if (esp_sntp_enabled()) {
+            esp_sntp_stop();
+        }
    }
 }

@@ -68,7 +51,12 @@ void NTPSettingsService::configureTime(AsyncWebServerRequest * request, JsonVari
            tm.tm_isdst         = -1; // not set by strptime, tells mktime to determine daylightsaving
            time_t         time = mktime(&tm);
            struct timeval now  = {.tv_sec = time, .tv_usec = {}};
+#if CONFIG_IDF_TARGET_ESP32C3
+            // settimeofday and adjtime() does not work, unknown how to set time
+            emsesp::EMSESP::logger().warning("manual clock setting not possible");
+#else
            settimeofday(&now, nullptr);
+#endif
            AsyncWebServerResponse * response = request->beginResponse(200);
            request->send(response);
            return;
--- a/src/ESP32React/NTPSettingsService.h
+++ b/src/ESP32React/NTPSettingsService.h
@@ -44,6 +44,7 @@ class NTPSettingsService : public StatefulService<NTPSettings> {
    NTPSettingsService(AsyncWebServer * server, FS * fs, SecurityManager * securityManager);

    void        begin();
+    void        loop();
    static void ntp_received(struct timeval * tv);

  private:
@@ -51,7 +52,6 @@ class NTPSettingsService : public StatefulService<NTPSettings> {
    FSPersistence<NTPSettings> _fsPersistence;
    volatile bool              _connected;

-    void WiFiEvent(WiFiEvent_t event);
    void configureNTP();
    void configureTime(AsyncWebServerRequest * request, JsonVariant json);
 };
--- a/src/ESP32React/NetworkSettingsService.cpp
+++ b/src/ESP32React/NetworkSettingsService.cpp
@@ -9,7 +9,7 @@ NetworkSettingsService::NetworkSettingsService(AsyncWebServer * server, FS * fs,
    , _stopping(false) {
    addUpdateHandler([this] { reconfigureWiFiConnection(); }, false);
    // Eth is also bound to the WifiGeneric event handler
-    WiFi.onEvent([this](WiFiEvent_t event, WiFiEventInfo_t info) { WiFiEvent(event, info); });
+    // Network.onEvent([this](arduino_event_id_t event, arduino_event_info_t info) { WiFiEvent(event, info); });
 }

 static bool formatBssid(const String & bssid, uint8_t (&mac)[6]) {
@@ -34,8 +34,8 @@ void NetworkSettingsService::begin() {
    WiFi.persistent(false);
    WiFi.setAutoReconnect(false);

-    WiFi.mode(WIFI_MODE_MAX);
-    WiFi.mode(WIFI_MODE_NULL);
+    WiFi.mode(WIFI_STA);
+    WiFi.mode(WIFI_OFF);

    // scan settings give connect issues since arduino 2.0.14 and arduino 3.x.x with some wifi systems
    // WiFi.setScanMethod(WIFI_ALL_CHANNEL_SCAN); // default is FAST_SCAN
@@ -62,28 +62,124 @@ void NetworkSettingsService::loop() {
        _lastConnectionAttempt = currentMillis;
        manageSTA();
    }
+    static uint8_t connect = 0;
+    enum uint8_t {
+        CONNECT_IDLE = 0,
+        CONNECT_WAIT_ETH,
+        CONNECT_WAIT_IP4,
+        CONNECT_WAIT_ETH_IP4,
+        CONNECT_WAIT_IP6,
+        CONNECT_WAIT_ETH_IP6,
+        CONNECT_ETH_ACTIVE,
+        CONNECT_WIFI_ACTIVE
+    };
+    switch (connect) {
+    default:
+        connect = CONNECT_IDLE;
+        break;
+    case CONNECT_IDLE:
+        if (ETH.started() && _state.ssid.length() == 0) {
+            emsesp::EMSESP::logger().info("ETH started");
+            ETH.setHostname(emsesp::EMSESP::system_.hostname().c_str());
+            ETH.enableIPv6(true);
+            if (_state.staticIPConfig) {
+                ETH.config(_state.localIP, _state.gatewayIP, _state.subnetMask, _state.dnsIP1, _state.dnsIP2);
+            }
+            connect = CONNECT_WAIT_ETH;
+        }
+        if (WiFi.isConnected()) {
+            emsesp::EMSESP::logger().info("Wifi connected");
+            if (_state.tx_power == 0) {
+                setWiFiPowerOnRSSI();
+            }
+            mDNS_start();
+            emsesp::EMSESP::system_.has_ipv6(true);
+            connect = CONNECT_WAIT_IP4;
+        }
+        break;
+    case CONNECT_WAIT_ETH:
+        if (ETH.connected()) {
+            emsesp::EMSESP::logger().info("ETH connected");
+            emsesp::EMSESP::system_.ethernet_connected(true);
+            mDNS_start();
+            emsesp::EMSESP::system_.has_ipv6(true);
+            connect = CONNECT_WAIT_ETH_IP4;
+        }
+        break;
+    case CONNECT_WAIT_ETH_IP4:
+        if (ETH.hasIP()) {
+            emsesp::EMSESP::logger().info("ETH IPv4: %s", ETH.localIP().toString().c_str());
+            connect = CONNECT_WAIT_ETH_IP6;
+        }
+        if (!ETH.connected()) {
+            connect = CONNECT_ETH_ACTIVE;
+        }
+        break;
+    case CONNECT_WAIT_ETH_IP6:
+        if (ETH.hasLinkLocalIPv6() && ETH.hasGlobalIPv6()) {
+            emsesp::EMSESP::system_.has_ipv6(true);
+            connect = CONNECT_ETH_ACTIVE;
+        }
+        if (!ETH.connected()) {
+            connect = CONNECT_ETH_ACTIVE;
+        }
+        break;
+    case CONNECT_ETH_ACTIVE:
+        if (!ETH.connected()) {
+            emsesp::EMSESP::logger().info("ETH disconnected");
+            emsesp::EMSESP::system_.ethernet_connected(false);
+            emsesp::EMSESP::system_.has_ipv6(false);
+            connect = CONNECT_IDLE;
+        }
+        break;
+    case CONNECT_WAIT_IP4:
+        if (!WiFi.localIP().toString().isEmpty()) {
+            emsesp::EMSESP::logger().info("Wifi IPv4: %s", WiFi.localIP().toString().c_str());
+            connect = CONNECT_WAIT_IP6;
+        }
+        if (!WiFi.isConnected()) {
+            connect = CONNECT_ETH_ACTIVE;
+        }
+        break;
+    case CONNECT_WAIT_IP6:
+        if (WiFi.linkLocalIPv6().toString() != "::" && WiFi.globalIPv6().toString() != "::") {
+            emsesp::EMSESP::logger().info("Wifi IPv6: %s, %s", WiFi.linkLocalIPv6().toString().c_str(), WiFi.globalIPv6().toString().c_str());
+            emsesp::EMSESP::system_.has_ipv6(true);
+            connect = CONNECT_WIFI_ACTIVE;
+        }
+        if (!WiFi.isConnected()) {
+            connect = CONNECT_WIFI_ACTIVE;
+        }
+        break;
+    case CONNECT_WIFI_ACTIVE:
+        if (!WiFi.isConnected()) {
+            emsesp::EMSESP::logger().info("WiFi disconnected");
+            if (_stopping) {
+                _lastConnectionAttempt = 0;
+                _stopping              = false;
+            }
+            emsesp::EMSESP::system_.has_ipv6(false);
+            connect = CONNECT_IDLE;
+        }
+        break;
+    }
 }

 void NetworkSettingsService::manageSTA() {
    // Abort if already connected, or if we have no SSID
    if (WiFi.isConnected() || _state.ssid.length() == 0) {
-#if ESP_IDF_VERSION_MAJOR >= 5
-        if (_state.ssid.length() == 0) {
-            ETH.enableIPv6(true);
-        }
-#endif
        return;
    }

    // Connect or reconnect as required
    if ((WiFi.getMode() & WIFI_STA) == 0) {
-#if ESP_IDF_VERSION_MAJOR >= 5
+        WiFi.setHostname(_state.hostname.c_str());     // updates shared default_hostname buffer
+        WiFi.enableSTA(true);                          // creates the STA netif
+        WiFi.STA.setHostname(_state.hostname.c_str()); // pushes to esp_netif_set_hostname
        WiFi.enableIPv6(true);
-#endif
        if (_state.staticIPConfig) {
            WiFi.config(_state.localIP, _state.gatewayIP, _state.subnetMask, _state.dnsIP1, _state.dnsIP2); // configure for static IP
        }
-        WiFi.setHostname(_state.hostname.c_str()); // set hostname

        // www.esp32.com/viewtopic.php?t=12055
        if (_state.bandwidth20) {
@@ -293,7 +389,7 @@ const char * NetworkSettingsService::disconnectReason(uint8_t code) {
 }

 // handles both WiFI and Ethernet
-void NetworkSettingsService::WiFiEvent(WiFiEvent_t event, WiFiEventInfo_t info) {
+void NetworkSettingsService::WiFiEvent(arduino_event_id_t event, arduino_event_info_t info) {
 #ifndef EMSESP_STANDALONE

    switch (event) {
@@ -305,7 +401,7 @@ void NetworkSettingsService::WiFiEvent(WiFiEvent_t event, WiFiEventInfo_t info)
        break;

    case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
-        connectcount_++; // count the number of WiFi reconnects
+        connectcount_ = connectcount_ + 1; // count the number of WiFi reconnects
        emsesp::EMSESP::logger().warning("WiFi disconnected (#%d). Reason: %s (%d)",
                                         connectcount_,
                                         disconnectReason(info.wifi_sta_disconnected.reason),
@@ -325,11 +421,11 @@ void NetworkSettingsService::WiFiEvent(WiFiEvent_t event, WiFiEventInfo_t info)
        break;

    case ARDUINO_EVENT_ETH_START:
-        // configure for static IP
+        // apply hostname FIRST so DHCP DISCOVER carries the correct name
+        ETH.setHostname(emsesp::EMSESP::system_.hostname().c_str());
        if (_state.staticIPConfig) {
            ETH.config(_state.localIP, _state.gatewayIP, _state.subnetMask, _state.dnsIP1, _state.dnsIP2);
        }
-        ETH.setHostname(emsesp::EMSESP::system_.hostname().c_str());
        break;

    case ARDUINO_EVENT_ETH_GOT_IP:
@@ -360,25 +456,15 @@ void NetworkSettingsService::WiFiEvent(WiFiEvent_t event, WiFiEventInfo_t info)
        if (_state.tx_power == 0) {
            setWiFiPowerOnRSSI();
        }
-#if ESP_IDF_VERSION_MAJOR < 5
-        WiFi.enableIpV6(); // force ipv6
-#endif
        break;

    case ARDUINO_EVENT_ETH_CONNECTED:
-#if ESP_IDF_VERSION_MAJOR < 5
-        ETH.enableIpV6(); // force ipv6
-#endif
        break;

        // IPv6 specific - WiFi/Eth
    case ARDUINO_EVENT_WIFI_STA_GOT_IP6:
    case ARDUINO_EVENT_ETH_GOT_IP6: {
-#if !TASMOTA_SDK && ESP_IDF_VERSION_MAJOR < 5
-        auto ip6 = IPv6Address((uint8_t *)info.got_ip6.ip6_info.ip.addr).toString();
-#else
-        auto ip6 = IPAddress(IPv6, (uint8_t *)info.got_ip6.ip6_info.ip.addr, 0).toString();
-#endif
+        auto         ip6  = IPAddress(IPv6, (uint8_t *)info.got_ip6.ip6_info.ip.addr, 0).toString();
        const char * link = event == ARDUINO_EVENT_ETH_GOT_IP6 ? "Eth" : "WiFi";
        if (ip6.startsWith("fe80")) {
            emsesp::EMSESP::logger().info("IPv6 (%s) local: %s", link, ip6.c_str());
--- a/src/ESP32React/NetworkSettingsService.h
+++ b/src/ESP32React/NetworkSettingsService.h
@@ -107,7 +107,7 @@ class NetworkSettingsService : public StatefulService<NetworkSettings> {

    volatile uint16_t connectcount_ = 0; // number of wifi reconnects

-    void         WiFiEvent(WiFiEvent_t event, WiFiEventInfo_t info);
+    void         WiFiEvent(arduino_event_id_t event, arduino_event_info_t info);
    void         mDNS_start() const;
    const char * disconnectReason(uint8_t code);
    void         reconfigureWiFiConnection();
--- a/src/ESP32React/NetworkStatus.cpp
+++ b/src/ESP32React/NetworkStatus.cpp
@@ -2,7 +2,7 @@

 #include <emsesp.h>

-#ifdef TASMOTA_SDK
+#ifdef NO_TLS_SUPPORT
 #include "lwip/dns.h"
 #endif

@@ -31,22 +31,13 @@ void NetworkStatus::networkStatus(AsyncWebServerRequest * request) {
    // for both connections show ethernet
    if (ethernet_connected) {
        // Ethernet
-        root["local_ip"] = ETH.localIP().toString();
-#if ESP_IDF_VERSION_MAJOR < 5
-        root["local_ipv6"] = ETH.localIPv6().toString();
-#else
-        root["local_ipv6"] = ETH.linkLocalIPv6().toString();
-#endif
+        root["local_ip"]    = ETH.localIP().toString();
+        root["local_ipv6"]  = ETH.linkLocalIPv6().toString();
        root["mac_address"] = ETH.macAddress();
        root["subnet_mask"] = ETH.subnetMask().toString();
        root["gateway_ip"]  = ETH.gatewayIP().toString();
-#ifdef TASMOTA_SDK
-        IPAddress dnsIP1 = IPAddress(dns_getserver(0));
-        IPAddress dnsIP2 = IPAddress(dns_getserver(1));
-#else
-        IPAddress dnsIP1 = ETH.dnsIP(0);
-        IPAddress dnsIP2 = ETH.dnsIP(1);
-#endif
+        IPAddress dnsIP1    = ETH.dnsIP(0);
+        IPAddress dnsIP2    = ETH.dnsIP(1);
        if (IPUtils::isSet(dnsIP1)) {
            root["dns_ip_1"] = dnsIP1.toString();
        }
@@ -54,12 +45,8 @@ void NetworkStatus::networkStatus(AsyncWebServerRequest * request) {
            root["dns_ip_2"] = dnsIP2.toString();
        }
    } else if (wifi_status == WL_CONNECTED) {
-        root["local_ip"] = WiFi.localIP().toString();
-#if ESP_IDF_VERSION_MAJOR < 5
-        root["local_ipv6"] = WiFi.localIPv6().toString();
-#else
-        root["local_ipv6"] = WiFi.linkLocalIPv6().toString();
-#endif
+        root["local_ip"]        = WiFi.localIP().toString();
+        root["local_ipv6"]      = WiFi.linkLocalIPv6().toString();
        root["mac_address"]     = WiFi.macAddress();
        root["rssi"]            = WiFi.RSSI();
        root["ssid"]            = WiFi.SSID();
@@ -71,14 +58,8 @@ void NetworkStatus::networkStatus(AsyncWebServerRequest * request) {
        if (WiFi.gatewayIP() != INADDR_NONE) {
            root["gateway_ip"] = WiFi.gatewayIP().toString();
        }
-
-#ifdef TASMOTA_SDK
-        IPAddress dnsIP1 = IPAddress(dns_getserver(0));
-        IPAddress dnsIP2 = IPAddress(dns_getserver(1));
-#else
        IPAddress dnsIP1 = WiFi.dnsIP(0);
        IPAddress dnsIP2 = WiFi.dnsIP(1);
-#endif
        if (dnsIP1 != INADDR_NONE) {
            root["dns_ip_1"] = dnsIP1.toString();
        }
--- a/src/core/analogsensor.cpp
+++ b/src/core/analogsensor.cpp
@@ -347,23 +347,13 @@ void AnalogSensor::reload(bool get_nvs) {
            sensor.polltime_ = sensor.value() != 0 ? uuid::get_uptime() + (sensor.factor() * 1000) : 0;
        } else if (sensor.type() >= AnalogType::PWM_0 && sensor.type() <= AnalogType::PWM_2) {
            LOG_DEBUG("PWM output on GPIO %02d", sensor.gpio());
-#if ESP_IDF_VERSION_MAJOR >= 5
            ledcAttach(sensor.gpio(), sensor.factor(), 13);
-#else
-            uint8_t channel = sensor.type() - AnalogType::PWM_0;
-            ledcSetup(channel, sensor.factor(), 13);
-            ledcAttachPin(sensor.gpio(), channel);
-#endif
            if (sensor.offset() > 100) {
                sensor.set_offset(100);
            } else if (sensor.offset() < 0) {
                sensor.set_offset(0);
            }
-#if ESP_IDF_VERSION_MAJOR >= 5
            ledcWrite(sensor.gpio(), (uint32_t)(sensor.offset() * 8191 / 100));
-#else
-            ledcWrite(channel, (uint32_t)(sensor.offset() * 8191 / 100));
-#endif
            sensor.set_value(sensor.offset());
            sensor.set_uom(DeviceValueUOM::PERCENT);
            publish_sensor(sensor);
@@ -1041,12 +1031,7 @@ bool AnalogSensor::command_setvalue(const char * value, const int8_t gpio) {
                }
                sensor.set_offset(val);
                sensor.set_value(val);
-#if ESP_IDF_VERSION_MAJOR >= 5
                ledcWrite(sensor.gpio(), (uint32_t)(sensor.offset() * 8191 / 100));
-#else
-                uint8_t channel = sensor.type() - AnalogType::PWM_0;
-                ledcWrite(channel, (uint32_t)(val * 8191 / 100));
-#endif
            } else {
                return false;
            }
--- a/src/core/default_settings.h
+++ b/src/core/default_settings.h
@@ -285,6 +285,8 @@ enum {
 #define EMSESP_PLATFORM "ESP32S3"
 #elif CONFIG_IDF_TARGET_ESP32 || EMSESP_STANDALONE
 #define EMSESP_PLATFORM "ESP32"
+#elif CONFIG_IDF_TARGET_ESP32C6
+#define EMSESP_PLATFORM "ESP32C6"
 #else
 #error Target CONFIG_IDF_TARGET is not supported
 #endif
@@ -293,12 +295,9 @@ enum {
 #ifndef STRINGIZE
 #define STRINGIZE(s) #s
 #endif
-#ifdef TASMOTA_SDK
+
 #define ARDUINO_VERSION_STR(major, minor, patch) "Tasmota Arduino v" STRINGIZE(major) "." STRINGIZE(minor) "." STRINGIZE(patch)
-#else
-#define ARDUINO_VERSION_STR(major, minor, patch) "ESP32 Arduino v" STRINGIZE(major) "." STRINGIZE(minor) "." STRINGIZE(patch)
-#endif
 #define ARDUINO_VERSION ARDUINO_VERSION_STR(ESP_ARDUINO_VERSION_MAJOR, ESP_ARDUINO_VERSION_MINOR, ESP_ARDUINO_VERSION_PATCH)
-#endif

 #endif
+#endif
--- a/src/core/emsesp.cpp
+++ b/src/core/emsesp.cpp
@@ -1727,6 +1727,8 @@ void EMSESP::start() {
 #ifndef EMSESP_STANDALONE
    if (factory_settings) {
        LOG_WARNING("No settings found on filesystem. Using factory settings.");
+        // make sure OTAdata is updated with core3 format
+        esp_ota_set_boot_partition(esp_ota_get_running_partition());
    }
 #endif

--- a/src/core/shuntingYard.cpp
+++ b/src/core/shuntingYard.cpp
@@ -380,11 +380,15 @@ std::string commands(std::string & expr, bool quotes) {
            if (return_code != CommandRet::OK && return_code != CommandRet::NO_VALUE) {
                return expr = "";
            }
-
-            std::string data = output["api_data"] | "";
-            if (!isnum(data) && quotes) {
-                data.insert(data.begin(), '"');
-                data.insert(data.end(), '"');
+            std::string data;
+            if (output["api_data"].is<std::string>()) {
+                data = output["api_data"].as<std::string>();
+                if (!isnum(data) && quotes) {
+                    data.insert(data.begin(), '"');
+                    data.insert(data.end(), '"');
+                }
+            } else {
+                serializeJson(output, data);
            }
            expr.replace(f, l, data);
            e        = f + data.length();
@@ -700,8 +704,7 @@ std::string compute(const std::string & expr) {
        std::string  cmd = expr_new.substr(f, e - f).c_str();
        JsonDocument doc;
        if (DeserializationError::Ok == deserializeJson(doc, cmd)) {
-            HTTPClient * http = new HTTPClient;
-            std::string  url, header_s, value_s, method_s, key_s, keys_s;
+            std::string url, header_s, value_s, method_s, key_s, keys_s;
            // search keys lower case
            for (JsonPair p : doc.as<JsonObject>()) {
                if (Helpers::toLower(p.key().c_str()) == "url") {
@@ -720,58 +723,150 @@ std::string compute(const std::string & expr) {
                    keys_s = p.key().c_str();
                }
            }
-            if (http->begin(url.c_str())) {
-                int httpResult = 0;
-                for (JsonPair p : doc[header_s].as<JsonObject>()) {
-                    http->addHeader(p.key().c_str(), p.value().as<std::string>().c_str());
+            bool        content_set = false;
+            std::string value       = doc[value_s] | "";
+            std::string method      = doc[method_s] | "GET";
+            if (value.length()) {
+                method = "POST";
+            }
+            std::string result;
+            int         httpResult = 0;
+#ifndef NO_TLS_SUPPORT
+            if (Helpers::toLower(url.c_str()).starts_with("https://")) {
+                WiFiClient *    basic_client = new WiFiClient;
+                ESP_SSLClient * ssl_client   = new ESP_SSLClient;
+                ssl_client->setInsecure(); // with root CA we should set here: ssl_client->setCACert(rootCACert);
+                ssl_client->setBufferSizes(1024, 1024);
+                ssl_client->setSessionTimeout(120); // Set the timeout in seconds (>=120 seconds)
+                url.replace(0, 8, "");
+                std::string host  = url;
+                auto        index = url.find_first_of('/');
+                if (index != std::string::npos) {
+                    host = url.substr(0, index);
+                    url.replace(0, index, "");
                }
-                std::string value  = doc[value_s] | "";
-                std::string method = doc[method_s] | "get";
-
-                // if there is data, force a POST
-                if (value.length() || Helpers::toLower(method) == "post") {
-                    if (value.find_first_of('{') != std::string::npos) {
-                        http->addHeader(asyncsrv::T_Content_Type, asyncsrv::T_application_json, false); // auto-set to JSON
-                    }
-                    httpResult = http->POST(value.c_str());
-                } else {
-                    httpResult = http->GET(); // normal GET
+                /*
+                index = host.find_first_of('@');
+                std::string auth;
+                if (index != std::string::npos) {
+                    auth = base64::encode(host.substr(0, index));
+                    host.replace(0, index, "");
                }
-
-                if (httpResult > 0) {
-                    std::string  result = http->getString().c_str();
-                    std::string  key    = doc[key_s] | "";
-                    JsonDocument keys_doc; // JsonDocument to hold "keys" after doc is parsed with HTTP body
-                    if (doc[keys_s].is<JsonArray>()) {
-                        keys_doc.set(doc[keys_s].as<JsonArray>());
-                    }
-                    JsonArray keys = keys_doc.as<JsonArray>();
-
-                    if (key.length() || !keys.isNull()) {
-                        doc.clear();
-                        if (DeserializationError::Ok == deserializeJson(doc, result)) {
-                            if (key.length()) {
-                                result = doc[key.c_str()].as<std::string>();
+                */
+                ssl_client->setClient(basic_client);
+                if (ssl_client->connect(host.c_str(), 443)) {
+                    if (value.length() || Helpers::toLower(method) == "post") {
+                        ssl_client->print("POST ");
+                        ssl_client->print(url.c_str());
+                        ssl_client->println(" HTTP/1.1");
+                        ssl_client->print("Host: ");
+                        ssl_client->println(host.c_str());
+                        for (JsonPair p : doc[header_s].as<JsonObject>()) {
+                            content_set |= (emsesp::Helpers::toLower(p.key().c_str()) == "content-type");
+                            ssl_client->print(p.key().c_str());
+                            ssl_client->print(": ");
+                            ssl_client->println(p.value().as<std::string>().c_str());
+                        }
+                        if (!content_set) {
+                            ssl_client->print("Content-Type: ");
+                            if (value.starts_with('{')) {
+                                ssl_client->println(asyncsrv::T_application_json);
                            } else {
-                                JsonVariant json = doc.as<JsonVariant>();
-                                for (JsonVariant keys_key : keys) {
-                                    if (keys_key.is<std::string>() && json.is<JsonObject>()) {
-                                        json = json[keys_key.as<std::string>()].as<JsonVariant>();
-                                    } else if (keys_key.is<int>() && json.is<JsonArray>()) {
-                                        json = json[keys_key.as<int>()].as<JsonVariant>();
-                                    } else {
-                                        break; // type mismatch
-                                    }
-                                }
-                                result = json.as<std::string>();
+                                ssl_client->println(asyncsrv::T_text_plain);
                            }
                        }
+                        ssl_client->print("Content-Length: ");
+                        ssl_client->println(value.length());
+                        ssl_client->println("Connection: close");
+                        ssl_client->print("\r\n");
+                        ssl_client->print(value.c_str());
+                    } else {
+                        ssl_client->print("GET ");
+                        ssl_client->print(url.c_str());
+                        ssl_client->println(" HTTP/1.1");
+                        ssl_client->print("Host: ");
+                        ssl_client->println(host.c_str());
+                        for (JsonPair p : doc[header_s].as<JsonObject>()) {
+                            ssl_client->print(p.key().c_str());
+                            ssl_client->print(": ");
+                            ssl_client->println(p.value().as<std::string>().c_str());
+                        }
+                        ssl_client->println("Connection: close");
+                    }
+                    auto ms = millis();
+                    while (!ssl_client->available() && millis() - ms < 3000) {
+                        delay(0);
+                    }
+                    while (ssl_client->available()) {
+                        result += (char)ssl_client->read();
+                    }
+                    ssl_client->stop();
+                    index = result.find_first_of(' ');
+                    if (index != std::string::npos) {
+                        httpResult = stoi(result.substr(index + 1, 3));
+                    }
+                    index = result.find("\r\n\r\n");
+                    if (index != std::string::npos) {
+                        result.replace(0, index + 4, "");
+                    }
+                }
+                delete ssl_client;
+                delete basic_client;
+            } else
+#endif
+                if (Helpers::toLower(url.c_str()).starts_with("http://")) {
+                HTTPClient * http = new HTTPClient;
+                if (http->begin(url.c_str())) {
+                    for (JsonPair p : doc[header_s].as<JsonObject>()) {
+                        http->addHeader(p.key().c_str(), p.value().as<std::string>().c_str());
+                        content_set |= (emsesp::Helpers::toLower(p.key().c_str()) == "content-type");
+                    }
+                    if (value.length() || Helpers::toLower(method) == "post") {
+                        if (!content_set) {
+                            http->addHeader("Content-Type", value.starts_with('{') ? asyncsrv::T_application_json : asyncsrv::T_text_plain);
+                        }
+                        httpResult = http->POST(value.c_str());
+                    } else {
+                        httpResult = http->GET(); // normal GET
+                    }
+                    if (httpResult > 0) {
+                        result = http->getString().c_str();
                    }
-                    expr_new.replace(f, e - f, result.c_str());
                }
                http->end();
                delete http;
            }
+            if (httpResult == 200) {
+                std::string  key = doc[key_s] | "";
+                JsonDocument keys_doc; // JsonDocument to hold "keys" after doc is parsed with HTTP body
+                if (doc[keys_s].is<JsonArray>()) {
+                    keys_doc.set(doc[keys_s].as<JsonArray>());
+                }
+                JsonArray keys = keys_doc.as<JsonArray>();
+                if (key.length() || !keys.isNull()) {
+                    doc.clear();
+                    if (DeserializationError::Ok == deserializeJson(doc, result)) {
+                        if (key.length()) {
+                            result = doc[key.c_str()].as<std::string>();
+                        } else {
+                            JsonVariant json = doc.as<JsonVariant>();
+                            for (JsonVariant keys_key : keys) {
+                                if (keys_key.is<std::string>() && json.is<JsonObject>()) {
+                                    json = json[keys_key.as<std::string>()].as<JsonVariant>();
+                                } else if (keys_key.is<int>() && json.is<JsonArray>()) {
+                                    json = json[keys_key.as<int>()].as<JsonVariant>();
+                                } else {
+                                    break; // type mismatch
+                                }
+                            }
+                            result = json.as<std::string>();
+                        }
+                    }
+                }
+                expr_new.replace(f, e - f, result);
+            } else if (httpResult != 0) {
+                EMSESP::logger().warning("URL command failed with https code: %d, response: %s", httpResult, result.c_str());
+            }
        }
        f = expr_new.find_first_of('{', e);
    }
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -37,6 +37,15 @@
 #include "../test/test.h"
 #endif

+#ifndef NO_TLS_SUPPORT
+#define ENABLE_SMTP
+#define USE_ESP_SSLCLIENT
+#define READYCLIENT_SSL_CLIENT ESP_SSLClient
+#define READYCLIENT_TYPE_1 // TYPE 1 when using ESP_SSLClient
+#include <ESP_SSLClient.h>
+#include <ReadyMail.h>
+#endif
+
 namespace emsesp {

 // Languages supported. Note: the order is important
@@ -105,6 +114,115 @@ bool System::command_send(const char * value, const int8_t id) {
    return EMSESP::txservice_.send_raw(value); // ignore id
 }

+bool System::command_sendmail(const char * value, const int8_t id) {
+    bool     enabled = false;
+    bool     ssl, starttls;
+    uint16_t port;
+    String   server, login, pass, sender, recp, subject;
+    EMSESP::webSettingsService.read([&](WebSettings & settings) {
+        enabled  = settings.email_enabled;
+        ssl      = settings.email_ssl;
+        starttls = settings.email_starttls;
+        server   = settings.email_server;
+        port     = settings.email_port;
+        login    = settings.email_login;
+        pass     = settings.email_pass;
+        sender   = settings.email_sender;
+        recp     = settings.email_recp;
+        subject  = settings.email_subject;
+    });
+    if (!enabled) {
+        return false;
+    }
+    LOG_DEBUG("Command sendmail port %d%s called with '%s'", port, ssl ? " (SSL)" : starttls ? " (STARTTLS)" : "", value);
+    // LOG_DEBUG("Command sendmail port %d called with '%s'", port, value);
+    bool success = false;
+
+#ifndef NO_TLS_SUPPORT
+    WiFiClient *    basic_client = new WiFiClient;
+    ESP_SSLClient * ssl_client   = new ESP_SSLClient;
+    ReadyClient *   r_client     = new ReadyClient(*ssl_client);
+    SMTPClient *    smtp         = new SMTPClient(*r_client);
+
+    ssl_client->setClient(basic_client);
+    ssl_client->setInsecure();
+    ssl_client->setBufferSizes(1024, 1024);
+    r_client->addPort(port, starttls ? readymail_protocol_tls : ssl ? readymail_protocol_ssl : readymail_protocol_plain_text);
+
+    // smtp->connect(server, port, sendmailCallback);
+    smtp->connect(server, port);
+    if (!smtp->isConnected()) {
+        LOG_ERROR("Sendmail connection error");
+        delete smtp;
+        delete r_client;
+        delete ssl_client;
+        delete basic_client;
+        return false;
+    }
+
+    // LOG_INFO("authenticate %s:%s", login.c_str(), pass.c_str());
+    smtp->authenticate(login, pass, readymail_auth_password);
+    if (!smtp->isAuthenticated()) {
+        LOG_ERROR("Sendmail authenticate error");
+        delete smtp;
+        delete r_client;
+        delete ssl_client;
+        delete basic_client;
+        return false;
+    }
+    JsonDocument doc;
+    String       body = value;
+    if (body.length()) {
+        auto error = deserializeJson(doc, (const char *)value);
+        if (!error && doc.as<JsonObject>().size() >= 0) {
+            subject = doc["subject"] | subject;
+            recp    = doc["to"] | recp;
+            sender  = doc["from"] | sender;
+            body    = doc["body"] | body;
+        }
+    }
+
+    SMTPMessage & msg = smtp->getMessage();
+    msg.headers.add(rfc822_subject, subject);
+    msg.headers.add(rfc822_from, sender);
+    msg.headers.add(rfc822_to, recp);
+
+    // Use addCustom to add custom header e.g. Importance and Priority.
+    // msg.headers.addCustom("Importance", PRIORITY);
+    // msg.headers.addCustom("X-MSMail-Priority", PRIORITY);
+    // msg.headers.addCustom("X-Priority", PRIORITY_NUM);
+    EMSESP::webSchedulerService.computed_value.clear();
+    EMSESP::webSchedulerService.raw_value = body.c_str();
+    for (uint16_t wait = 0; wait < 2000 && !EMSESP::webSchedulerService.raw_value.empty(); wait++) {
+        delay(1);
+    }
+    if (!EMSESP::webSchedulerService.computed_value.empty()) {
+        body = EMSESP::webSchedulerService.computed_value.c_str();
+        EMSESP::webSchedulerService.computed_value.clear();
+        EMSESP::webSchedulerService.computed_value.shrink_to_fit(); // free allocated memory
+    }
+    msg.text.body(body);
+
+    // bodyText.replace("\r\n", "<br>\r\n");
+    // msg.html.body("<html><body><div style=\"color:#cc0066;\">" + bodyText + "</div></body></html>");
+    // msg.html.transferEncoding("base64");
+
+    // With embedFile function, the html message will send as attachment.
+    // if (EMBED_MESSAGE)
+    //    msg.html.embedFile(true, "msg.html", embed_message_type_attachment);
+
+    msg.timestamp = time(nullptr);
+
+    success = smtp->send(msg);
+
+    delete smtp;
+    delete r_client;
+    delete ssl_client;
+    delete basic_client;
+#endif
+    return success;
+}
+
 // return string of languages and count
 std::string System::languages_string() {
    std::string languages_string = std::to_string(NUM_LANGUAGES) + " languages (";
@@ -237,7 +355,8 @@ bool System::command_message(const char * value, const int8_t id, JsonObject out
    LOG_INFO("Message: %s", EMSESP::webSchedulerService.computed_value.c_str());  // send to log
    Mqtt::queue_publish(F_(message), EMSESP::webSchedulerService.computed_value); // send to MQTT if enabled
    output["api_data"] = EMSESP::webSchedulerService.computed_value;              // send to API
-
+    EMSESP::webSchedulerService.computed_value.clear();
+    EMSESP::webSchedulerService.computed_value.shrink_to_fit();
    return true;
 }

@@ -461,7 +580,6 @@ void System::system_restart(const char * partitionname) {

    Mqtt::disconnect(); // gracefully disconnect MQTT, needed for QOS1
    EMSuart::stop();    // stop UART so there is no interference
-
 #ifndef EMSESP_STANDALONE
    delay(1000);   // wait 1 second
    ESP.restart(); // ka-boom! - this is the only place where the ESP32 restart is called
@@ -563,7 +681,6 @@ void System::store_settings(WebSettings & settings) {

    locale_         = settings.locale;
    developer_mode_ = settings.developer_mode;
-
    // start services
    if (settings.modbus_enabled) {
        if (EMSESP::modbus_ == nullptr) {
@@ -605,20 +722,11 @@ void System::start() {
    appfree_ = esp_ota_get_running_partition()->size / 1024 - appused_;
    refreshHeapMem(); // refresh free heap and max alloc heap
 #if CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S2
-#if ESP_IDF_VERSION_MAJOR < 5
-    temp_sensor_config_t temp_sensor = TSENS_CONFIG_DEFAULT();
-    temp_sensor_get_config(&temp_sensor);
-    temp_sensor.dac_offset = TSENS_DAC_DEFAULT; // DEFAULT: range:-10℃ ~  80℃, error < 1℃.
-    temp_sensor_set_config(temp_sensor);
-    temp_sensor_start();
-    temp_sensor_read_celsius(&temperature_);
-#else
    temperature_sensor_config_t temp_sensor_config = TEMPERATURE_SENSOR_CONFIG_DEFAULT(-10, 80);
    temperature_sensor_install(&temp_sensor_config, &temperature_handle_);
    temperature_sensor_enable(temperature_handle_);
    temperature_sensor_get_celsius(temperature_handle_, &temperature_);
 #endif
-#endif
 #endif

    EMSESP::esp32React.getNetworkSettingsService()->read([&](NetworkSettings & networkSettings) {
@@ -839,16 +947,9 @@ void System::send_info_mqtt() {
        doc["IPv4 gateway"]    = uuid::printable_to_string(WiFi.gatewayIP());
        doc["IPv4 nameserver"] = uuid::printable_to_string(WiFi.dnsIP());

-#if ESP_IDF_VERSION_MAJOR < 5
-        if (WiFi.localIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && WiFi.localIPv6().toString() != "::") {
-            doc["IPv6 address"] = uuid::printable_to_string(WiFi.localIPv6());
-        }
-#else
        if (WiFi.linkLocalIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && WiFi.linkLocalIPv6().toString() != "::") {
            doc["IPv6 address"] = uuid::printable_to_string(WiFi.linkLocalIPv6());
        }
-
-#endif
    }
 #endif
    Mqtt::queue_publish_retain(F_(info), doc.as<JsonObject>()); // topic called "info" and it's Retained
@@ -957,12 +1058,11 @@ void System::network_init() {
        delay(500);
        digitalWrite(eth_power_, HIGH);
    }
-
-#if ESP_IDF_VERSION_MAJOR < 5
-    eth_present_ = ETH.begin(phy_addr, power, mdc, mdio, type, clock_mode);
-#else
    eth_present_ = ETH.begin(type, phy_addr, mdc, mdio, power, clock_mode);
-#endif
+    if (eth_present_) {
+        // Push hostname to the ETH netif immediately after it's created
+        ETH.setHostname(hostname_.c_str());
+    }
 #endif
 }

@@ -974,13 +1074,9 @@ void System::system_check() {

 #ifndef EMSESP_STANDALONE
 #if CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S2
-#if ESP_IDF_VERSION_MAJOR < 5
-        temp_sensor_read_celsius(&temperature_);
-#else
        temperature_sensor_get_celsius(temperature_handle_, &temperature_);
 #endif
 #endif
-#endif

 #ifdef EMSESP_PINGTEST
        static uint64_t ping_count = 0;
@@ -1032,6 +1128,7 @@ void System::commands_init() {
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(read), System::command_read, FL_(read_cmd), CommandFlag::ADMIN_ONLY);
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(send), System::command_send, FL_(send_cmd), CommandFlag::ADMIN_ONLY);
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(fetch), System::command_fetch, FL_(fetch_cmd), CommandFlag::ADMIN_ONLY);
+    Command::add(EMSdevice::DeviceType::SYSTEM, F_(sendmail), System::command_sendmail, FL_(sendmail_cmd), CommandFlag::ADMIN_ONLY);
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(restart), System::command_restart, FL_(restart_cmd), CommandFlag::ADMIN_ONLY);
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(format), System::command_format, FL_(format_cmd), CommandFlag::ADMIN_ONLY);
    Command::add(EMSdevice::DeviceType::SYSTEM, F_(txpause), System::command_txpause, FL_(txpause_cmd), CommandFlag::ADMIN_ONLY);
@@ -1280,16 +1377,9 @@ void System::show_system(uuid::console::Shell & shell) {
        shell.printfln(" IPv4 address: %s/%s", uuid::printable_to_string(WiFi.localIP()).c_str(), uuid::printable_to_string(WiFi.subnetMask()).c_str());
        shell.printfln(" IPv4 gateway: %s", uuid::printable_to_string(WiFi.gatewayIP()).c_str());
        shell.printfln(" IPv4 nameserver: %s", uuid::printable_to_string(WiFi.dnsIP()).c_str());
-#if ESP_IDF_VERSION_MAJOR < 5
-        if (WiFi.localIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && WiFi.localIPv6().toString() != "::") {
-            shell.printfln(" IPv6 address: %s", uuid::printable_to_string(WiFi.localIPv6()).c_str());
-        }
-#else
        if (WiFi.linkLocalIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && WiFi.linkLocalIPv6().toString() != "::") {
            shell.printfln(" IPv6 address: %s", uuid::printable_to_string(WiFi.linkLocalIPv6()).c_str());
        }
-#endif
-
        break;

    case WL_CONNECT_FAILED:
@@ -1320,15 +1410,9 @@ void System::show_system(uuid::console::Shell & shell) {
        shell.printfln(" IPv4 address: %s/%s", uuid::printable_to_string(ETH.localIP()).c_str(), uuid::printable_to_string(ETH.subnetMask()).c_str());
        shell.printfln(" IPv4 gateway: %s", uuid::printable_to_string(ETH.gatewayIP()).c_str());
        shell.printfln(" IPv4 nameserver: %s", uuid::printable_to_string(ETH.dnsIP()).c_str());
-#if ESP_IDF_VERSION_MAJOR < 5
-        if (ETH.localIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && ETH.localIPv6().toString() != "::") {
-            shell.printfln(" IPv6 address: %s", uuid::printable_to_string(ETH.localIPv6()).c_str());
-        }
-#else
        if (ETH.linkLocalIPv6().toString() != "0000:0000:0000:0000:0000:0000:0000:0000" && ETH.linkLocalIPv6().toString() != "::") {
            shell.printfln(" IPv6 address: %s", uuid::printable_to_string(ETH.linkLocalIPv6()).c_str());
        }
-#endif
    }
    shell.println();

@@ -1350,10 +1434,10 @@ void System::show_system(uuid::console::Shell & shell) {
    }

    shell.println();
-
 #endif
 }

+
 // see if there is a restore of an older settings file that needs to be applied
 // note there can be only one file at a time
 bool System::check_restore() {
@@ -1653,8 +1737,8 @@ bool System::check_upgrade() {
    return false; // no reboot required
 }

-// map each config filename to its human-readable section key
 #ifndef EMSESP_STANDALONE
+// map each config filename to its human-readable section key
 static const std::pair<const char *, const char *> SECTION_MAP[] = {
    {NETWORK_SETTINGS_FILE, "Network"},
    {AP_SETTINGS_FILE, "AP"},
@@ -1713,7 +1797,7 @@ void System::exportSystemBackup(JsonObject output) {
    output["version"] = EMSESP_APP_VERSION; // add the version to the output

 #ifndef EMSESP_STANDALONE
-        // add date/time if NTP enabled and active
+    // add date/time if NTP enabled and active
    if ((esp_sntp_enabled()) && (EMSESP::system_.ntp_connected())) {
        time_t now = time(nullptr);
        if (now > 1500000000L) {
@@ -1769,27 +1853,16 @@ void System::exportSystemBackup(JsonObject output) {

    const char *   nvs_part = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, "nvs1") ? "nvs1" : "nvs"; // nvs1 is on 16MBs
    nvs_iterator_t it       = nullptr;
-#if ESP_IDF_VERSION_MAJOR < 5
-    it = nvs_entry_find(nvs_part, "ems-esp", NVS_TYPE_ANY);
-    if (it == nullptr) {
-#else
-    esp_err_t err = nvs_entry_find(nvs_part, "ems-esp", NVS_TYPE_ANY, &it);
+    esp_err_t      err      = nvs_entry_find(nvs_part, "ems-esp", NVS_TYPE_ANY, &it);
    if (err != ESP_OK) {
-#endif
        LOG_ERROR("Failed to find NVS entry for %s", nvs_part);
        return;
    }

    JsonArray entries = node["nvs"].to<JsonArray>();
-#if ESP_IDF_VERSION_MAJOR < 5
-    while (it != nullptr) {
-        nvs_entry_info_t info;
-        nvs_entry_info(it, &info);
-#else
    while (err == ESP_OK) {
        nvs_entry_info_t info;
        nvs_entry_info(it, &info);
-#endif
        JsonObject entry = entries.add<JsonObject>();
        entry["type"]    = info.type;
        entry["key"]     = info.key;
@@ -1824,14 +1897,8 @@ void System::exportSystemBackup(JsonObject output) {
            entry["value"] = EMSESP::nvs_.getString(info.key);
            break;
        }
-
-#if ESP_IDF_VERSION_MAJOR < 5
-        it = nvs_entry_next(it);
-    }
-#else
        err = nvs_entry_next(&it);
    }
-#endif

    if (it != nullptr) {
        nvs_release_iterator(it);
@@ -2633,12 +2700,12 @@ bool System::command_info(const char * value, const int8_t id, JsonObject output
        node["maxWebLogBuffer"] = settings.weblog_buffer;

        /*
-#if defined(EMSESP_UNITY)
-        node["webLogBuffer"] = 0;
-#else
-        node["webLogBuffer"] = EMSESP::webLogService.num_log_messages();
-#endif
-*/
+ #if defined(EMSESP_UNITY)
+         node["webLogBuffer"] = 0;
+ #else
+         node["webLogBuffer"] = EMSESP::webLogService.num_log_messages();
+ #endif
+ */
        node["modbusEnabled"]   = settings.modbus_enabled;
        node["forceHeatingOff"] = settings.boiler_heatingoff;
        node["developerMode"]   = settings.developer_mode;
@@ -3266,7 +3333,7 @@ void System::set_valid_system_gpios() {
    valid_system_gpios_ = string_range_to_vector("0-21", "2, 8, 12-17, 18-19");

 #elif CONFIG_IDF_TARGET_ESP32S2
-        // https://docs.espressif.com/projects/esp-idf/en/stable/esp32s2/api-reference/peripherals/gpio.html
+    // https://docs.espressif.com/projects/esp-idf/en/stable/esp32s2/api-reference/peripherals/gpio.html
    // excluded:
    // GPIO26 - GPIO32 = SPI flash and PSRAM
    // GPIO45 - GPIO46 = strapping pins
@@ -3279,7 +3346,7 @@ void System::set_valid_system_gpios() {
    valid_system_gpios_ = string_range_to_vector("0-46", "19, 20, 26-32, 45-46, 39-42, 22-25");

 #elif CONFIG_IDF_TARGET_ESP32S3
-        // https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-reference/peripherals/gpio.html
+    // https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-reference/peripherals/gpio.html
    // excluded:
    // GPIO3, GPIO45 - GPIO46 = strapping pins
    // GPIO26 - GPIO32 = SPI flash and PSRAM and not recommended
@@ -3298,7 +3365,7 @@ void System::set_valid_system_gpios() {
    }

 #elif CONFIG_IDF_TARGET_ESP32
-        // https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/peripherals/gpio.html
+    // https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/peripherals/gpio.html
    // excluded:
    // GPIO6 - GPIO11, GPIO16 - GPIO17 = used for SPI flash and PSRAM (dio mode only GPIO06-GPIO08, GPIO11)
    // GPIO20, GPIO24, GPIO28 - GPIO31 = don't exist
@@ -3329,6 +3396,10 @@ void System::set_valid_system_gpios() {
    } else {
        valid_system_gpios_ = string_range_to_vector("0-39", "6-11, 20, 24, 28-31");
    }
+#elif CONFIG_IDF_TARGET_ESP32C6
+    // https://docs.espressif.com/projects/esp-idf/en/v5.5.3/esp32c6/api-reference/peripherals/gpio.html
+    // 24-30 used for flash, 12-13 USB, 16-17 uart0
+    valid_system_gpios_ = string_range_to_vector("0-30", "12-13, 16-17, 24-30");
 #elif defined(EMSESP_STANDALONE)
    valid_system_gpios_ = string_range_to_vector("0-39");
 #endif
--- a/src/core/system.h
+++ b/src/core/system.h
@@ -37,11 +37,7 @@
 #include <uuid/log.h>
 #include <PButton.h>

-#if ESP_ARDUINO_VERSION_MAJOR < 3
-#define EMSESP_RGB_WRITE neopixelWrite
-#else
 #define EMSESP_RGB_WRITE rgbLedWrite
-#endif

 #if CONFIG_IDF_TARGET_ESP32
 // there is no official API available on the original ESP32
@@ -49,12 +45,8 @@ extern "C" {
 uint8_t temprature_sens_read();
 }
 #elif CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S2
-#if ESP_IDF_VERSION_MAJOR < 5
-#include "driver/temp_sensor.h"
-#else
 #include "driver/temperature_sensor.h"
 #endif
-#endif

 using uuid::console::Shell;

@@ -103,6 +95,7 @@ class System {
    static bool command_info(const char * value, const int8_t id, JsonObject output);
    static bool command_response(const char * value, const int8_t id, JsonObject output);
    static bool command_service(const char * cmd, const char * value);
+    static bool command_sendmail(const char * value, const int8_t id);
    static bool command_txpause(const char * value, const int8_t id);

    static bool        get_value_info(JsonObject root, const char * cmd);
@@ -502,9 +495,7 @@ class System {
    uint32_t appfree_;

 #if CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S2
-#if ESP_IDF_VERSION_MAJOR >= 5
    temperature_sensor_handle_t temperature_handle_ = NULL;
-#endif
 #endif
    float temperature_ = 0;
 };
--- a/src/core/telegram.h
+++ b/src/core/telegram.h
@@ -159,10 +159,11 @@ class EMSbus {
  public:
    static uuid::log::Logger logger_;

-    static constexpr uint8_t EMS_MASK_UNSET     = 0xFF; // EMS bus type (budrus/junkers) hasn't been detected yet
-    static constexpr uint8_t EMS_MASK_HT3       = 0x80; // EMS bus type Junkers/HT3
-    static constexpr uint8_t EMS_MASK_BUDERUS   = 0xFF; // EMS bus type Buderus
-    static constexpr uint8_t EMS_TX_ERROR_LIMIT = 10;   // % limit of failed Tx read/write attempts before showing a warning
+    static constexpr uint8_t EMS_MASK_UNSET       = 0xFF; // EMS bus type (budrus/junkers) hasn't been detected yet
+    static constexpr uint8_t EMS_MASK_HT3         = 0x80; // EMS bus type Junkers/HT3
+    static constexpr uint8_t EMS_MASK_BUDERUS     = 0xFF; // EMS bus type Buderus
+    static constexpr uint8_t EMS_TX_ERROR_LIMIT   = 10;   // % limit of failed Tx read/write attempts before showing a warning
+    static constexpr uint8_t EMS_POLL_MATCH_LIMIT = 3;    // consecutive poll matches needed before declaring bus connected

    static bool is_ht3() {
        return (ems_mask_ == EMS_MASK_HT3);
@@ -210,7 +211,6 @@ class EMSbus {
        if (!last_bus_activity_) {
            bus_uptime_start_ = timestamp;
        }
-
        last_bus_activity_ = timestamp;
        bus_connected_     = true;
    }
--- a/src/devices/connect.cpp
+++ b/src/devices/connect.cpp
@@ -39,11 +39,11 @@ Connect::Connect(uint8_t device_type, uint8_t device_id, uint8_t product_id, con
                          DeviceValueUOM::DEGREES);
    // Roomthermostats
    for (uint8_t i = 0; i < 16; i++) {
-        register_telegram_type(0x0BDD + i, "Room", false, MAKE_PF_CB(process_roomThermostat));                 // broadcasted
-        register_telegram_type(0x0B3D + i, "Roomname", false, MAKE_PF_CB(process_roomThermostatName), 100);         // fetch for active circuits
+        register_telegram_type(0x0BDD + i, "Room", false, MAKE_PF_CB(process_roomThermostat));                    // broadcasted
+        register_telegram_type(0x0B3D + i, "Roomname", false, MAKE_PF_CB(process_roomThermostatName), 100);       // fetch for active circuits
        register_telegram_type(0x0BB5 + i, "Roomsettings", false, MAKE_PF_CB(process_roomThermostatSettings), 8); // fetch for active circuits
-        register_telegram_type(0x1230 + i, "Roomparams", false, MAKE_PF_CB(process_roomThermostatParam));      // fetch for active circuits
-        register_telegram_type(0x1244 + i, "Roomdata", false, MAKE_PF_CB(process_roomThermostatData));         // broadcasted
+        register_telegram_type(0x1230 + i, "Roomparams", false, MAKE_PF_CB(process_roomThermostatParam));         // fetch for active circuits
+        register_telegram_type(0x1244 + i, "Roomdata", false, MAKE_PF_CB(process_roomThermostatData));            // broadcasted
    }
    register_telegram_type(0xDB65, "Roomschedule", true, MAKE_PF_CB(process_roomSchedule));
    // 0x2040, broadcast 36 bytes:
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -173,7 +173,7 @@ Thermostat::Thermostat(uint8_t device_type, uint8_t device_id, uint8_t product_i
        for (uint8_t i = 0; i < monitor_size; i++) {
            register_telegram_type(monitor_typeids[i], "RC300Monitor", false, MAKE_PF_CB(process_RC300Monitor), 33);
            register_telegram_type(set_typeids[i], "RC300Set", false, MAKE_PF_CB(process_RC300Set), 29);
-            register_telegram_type(summer_typeids[i], "RC300Summer", false, MAKE_PF_CB(process_RC300Summer), 14);
+            register_telegram_type(summer_typeids[i], "RC300Summer", false, MAKE_PF_CB(process_RC300Summer), 13);
            register_telegram_type(curve_typeids[i], "RC300Curves", false, MAKE_PF_CB(process_RC300Curve), 9);
            register_telegram_type(summer2_typeids[i], "RC300Summer2", false, MAKE_PF_CB(process_RC300Summer2), 8);
        }
--- a/src/emsesp_version.h
+++ b/src/emsesp_version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "3.8.2-dev.19"
+#define EMSESP_APP_VERSION "3.9.0-dev.0"
--- a/src/uart/emsuart_esp32.cpp
+++ b/src/uart/emsuart_esp32.cpp
@@ -39,7 +39,7 @@ uint32_t             inverse_mask = 0;
 // receive task, wait for break and call incoming_telegram
 void EMSuart::uart_event_task(void * pvParameters) {
    uart_event_t event;
-    uint8_t      telegram[UART_FIFO_LEN + 1]; // same size as in driver_install
+    uint8_t      telegram[UART_HW_FIFO_LEN(EMSUART_NUM) + 1]; // same size as in driver_install
    uint8_t      length = 0;

    while (1) {
@@ -66,18 +66,23 @@ void EMSuart::uart_event_task(void * pvParameters) {
 // initialize UART driver
 void EMSuart::start(const uint8_t tx_mode, const uint8_t rx_gpio, const uint8_t tx_gpio) {
    if (tx_mode_ == EMS_TXMODE_INIT) {
+#if CONFIG_IDF_TARGET_ESP32C6
+        uart_config_t uart_config = {.baud_rate           = EMSUART_BAUD,
+                                     .data_bits           = UART_DATA_8_BITS,
+                                     .parity              = UART_PARITY_DISABLE,
+                                     .stop_bits           = UART_STOP_BITS_1,
+                                     .flow_ctrl           = UART_HW_FLOWCTRL_DISABLE,
+                                     .rx_flow_ctrl_thresh = 0};
+#else
        uart_config_t uart_config = {.baud_rate           = EMSUART_BAUD,
                                     .data_bits           = UART_DATA_8_BITS,
                                     .parity              = UART_PARITY_DISABLE,
                                     .stop_bits           = UART_STOP_BITS_1,
                                     .flow_ctrl           = UART_HW_FLOWCTRL_DISABLE,
                                     .rx_flow_ctrl_thresh = 0,
-                                     .source_clk          = UART_SCLK_APB
-#if ESP_ARDUINO_VERSION_MAJOR >= 3
-                                     ,
-                                     .flags = {0}
+                                     .source_clk          = UART_SCLK_APB,
+                                     .flags               = {0}};
 #endif
-        };
 #if defined(EMSUART_RX_INVERT)
        inverse_mask |= UART_SIGNAL_RXD_INV;
 #endif
@@ -87,7 +92,12 @@ void EMSuart::start(const uint8_t tx_mode, const uint8_t rx_gpio, const uint8_t
        uart_param_config(EMSUART_NUM, &uart_config);
        uart_set_pin(EMSUART_NUM, tx_gpio, rx_gpio, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
        uart_set_line_inverse(EMSUART_NUM, inverse_mask);
-        uart_driver_install(EMSUART_NUM, UART_FIFO_LEN + 1, 0, UART_FIFO_LEN + 3, &uart_queue, 0); // buffer must be > fifo, queue can hold data+break+overflow message
+        uart_driver_install(EMSUART_NUM,
+                            UART_HW_FIFO_LEN(EMSUART_NUM) + 1,
+                            0,
+                            UART_HW_FIFO_LEN(EMSUART_NUM) + 3,
+                            &uart_queue,
+                            0); // buffer must be > fifo, queue can hold data+break+overflow message
        uart_set_rx_full_threshold(EMSUART_NUM, 1);
        uart_set_rx_timeout(EMSUART_NUM, 0); // disable

--- a/src/web/WebCustomizationService.cpp
+++ b/src/web/WebCustomizationService.cpp
@@ -54,10 +54,10 @@ void WebCustomization::read(WebCustomization & customizations, JsonObject root)
    JsonArray sensorsJson = root["ts"].to<JsonArray>();
    for (const SensorCustomization & sensor : customizations.sensorCustomizations) {
        JsonObject sensorJson   = sensorsJson.add<JsonObject>();
-        sensorJson["id"]        = (const char *)sensor.id;   // ID of chip
+        sensorJson["id"]        = (const char *)sensor.id;   // ID of dallas temperature sensor chip
        sensorJson["name"]      = (const char *)sensor.name; // n
        sensorJson["offset"]    = sensor.offset;             // o
-        sensorJson["is_system"] = sensor.is_system;          // s for core_voltage, supply_voltage
+        sensorJson["is_system"] = sensor.is_system;          // s for gateway_temperature
    }

    // Analog Sensor customization
--- a/src/web/WebSchedulerService.cpp
+++ b/src/web/WebSchedulerService.cpp
@@ -352,7 +352,6 @@ bool WebSchedulerService::command(const char * name, const std::string & command
    // parse json
    JsonDocument doc;
    if (deserializeJson(doc, cmd) == DeserializationError::Ok) {
-        HTTPClient  * http = new HTTPClient;
        std::string url = doc["url"] | "";
        // for a GET with parameters replace commands with values
        // don't search the complete url, it may contain a devicename in path
@@ -363,40 +362,139 @@ bool WebSchedulerService::command(const char * name, const std::string & command
            commands(s, false);
            url.replace(q + 1, l, s);
        }
-        if (http->begin(url.c_str())) {
-            // add any given headers
-            for (JsonPair p : doc["header"].as<JsonObject>()) {
-                http->addHeader(p.key().c_str(), p.value().as<String>().c_str());
+        std::string value  = doc["value"] | data;   // extract value if its in the command, or take the data
+        std::string method = doc["method"] | "GET"; // default GET
+        commands(value, false);
+        if (value.length()) {
+            method = "POST";
+        }
+        std::string result;
+        int         httpResult = 0;
+#ifndef NO_TLS_SUPPORT
+        if (Helpers::toLower(url.c_str()).starts_with("https://")) {
+            WiFiClient *    basic_client = new WiFiClient;
+            ESP_SSLClient * ssl_client   = new ESP_SSLClient;
+            ssl_client->setInsecure(); // with root CA we should set here: ssl_client->setCACert(rootCACert);
+            ssl_client->setBufferSizes(1024, 1024);
+            ssl_client->setSessionTimeout(120); // Set the timeout in seconds (>=120 seconds)
+            url.replace(0, 8, "");
+            std::string host  = url;
+            auto        index = url.find_first_of('/');
+            if (index != std::string::npos) {
+                host = url.substr(0, index);
+                url.replace(0, index, "");
            }
-            std::string value  = doc["value"] | data.c_str(); // extract value if its in the command, or take the data
-            std::string method = doc["method"] | "GET";       // default GET
-
-            commands(value, false);
-            // if there is data, force a POST
-            int httpResult = 0;
-            if (value.length() || method == "post") { // we have all lowercase
-                if (value.find_first_of('{') != std::string::npos) {
-                    http->addHeader(asyncsrv::T_Content_Type, asyncsrv::T_application_json, false); // auto-set to JSON
+            // EMSESP::logger().debug("Host: %s, URL: %s", host.c_str(), url.c_str());
+            ssl_client->setClient(basic_client);
+            if (ssl_client->connect(host.c_str(), 443)) {
+                if (value.length() || Helpers::toLower(method) == "post") {
+                    // EMSESP::logger().debug("POST %s HTTP/1.1", url.c_str());
+                    ssl_client->print("POST ");
+                    ssl_client->print(url.c_str());
+                    ssl_client->println(" HTTP/1.1");
+                    ssl_client->print("Host: ");
+                    ssl_client->println(host.c_str());
+                    bool content_set = false;
+                    for (JsonPair p : doc["header"].as<JsonObject>()) {
+                        content_set |= (emsesp::Helpers::toLower(p.key().c_str()) == "content-type");
+                        ssl_client->print(p.key().c_str());
+                        ssl_client->print(": ");
+                        ssl_client->println(p.value().as<std::string>().c_str());
+                    }
+                    if (!content_set) {
+                        ssl_client->print("Content-Type: ");
+                        if (value.starts_with('{')) {
+                            ssl_client->println(asyncsrv::T_application_json);
+                        } else {
+                            ssl_client->println(asyncsrv::T_text_plain);
+                        }
+                    }
+                    ssl_client->print("Content-Length: ");
+                    ssl_client->println(value.length());
+                    ssl_client->println("Connection: close");
+                    ssl_client->print("\r\n");
+                    ssl_client->print(value.c_str());
+                } else {
+                    // EMSESP::logger().debug("GET %s HTTP/1.1", url.c_str());
+                    ssl_client->print("GET ");
+                    ssl_client->print(url.c_str());
+                    ssl_client->println(" HTTP/1.1");
+                    ssl_client->print("Host: ");
+                    ssl_client->println(host.c_str());
+                    for (JsonPair p : doc["header"].as<JsonObject>()) {
+                        ssl_client->print(p.key().c_str());
+                        ssl_client->print(": ");
+                        ssl_client->println(p.value().as<std::string>().c_str());
+                    }
+                    ssl_client->println("Connection: close");
+                }
+                auto ms = millis();
+                while (ssl_client->connected() && !ssl_client->available() && millis() - ms < 3000) {
+                    delay(0);
+                }
+                while (ssl_client->available()) {
+                    result += (char)ssl_client->read();
+                }
+                ssl_client->stop();
+                // EMSESP::logger().debug("HTTPS response: %s", result.c_str());
+                index = result.find_first_of(' ');
+                if (index != std::string::npos) {
+                    httpResult = stoi(result.substr(index + 1, 3));
+                    // EMSESP::logger().debug("HTTPS code: %i", httpResult);
+                }
+                index = result.find("\r\n\r\n");
+                if (index != std::string::npos) {
+                    result.replace(0, index + 4, "");
+                    // EMSESP::logger().debug("HTTPS response: %s", result.c_str());
                }
-                httpResult = http->POST(value.c_str());
            } else {
-                httpResult = http->GET(); // normal GET
+                EMSESP::logger().warning("HTTPS connection failed");
            }
-
-            http->end();
-            delete http;
-
+            delete ssl_client;
+            delete basic_client;
            // check HTTP return code
            if (httpResult != 200) {
-                char error[100];
-                snprintf(error, sizeof(error), "Schedule %s: URL command failed with http code %d", name, httpResult);
-                EMSESP::logger().warning(error);
+                EMSESP::logger().warning("Schedule '%s': URL command failed with http code %d", name, httpResult);
+                return false;
+            }
+            return true;
+        } else
+#endif
+            if (Helpers::toLower(url.c_str()).starts_with("http://")) {
+            HTTPClient * http = new HTTPClient;
+            if (http->begin(url.c_str())) {
+                bool content_set = false;
+                for (JsonPair p : doc["header"].as<JsonObject>()) {
+                    http->addHeader(p.key().c_str(), p.value().as<std::string>().c_str());
+                    content_set |= p.key() == "content-type";
+                }
+                // if there is data, force a POST
+                if (Helpers::toLower(method) == "post") { // we have all lowercase
+                    if (!content_set) {
+                        // http->addHeader("Content-Type", value.find_first_of('{') != std::string::npos ? "application/json" : "text/plain");
+                        if (value.starts_with('{')) {
+                            http->addHeader(asyncsrv::T_Content_Type, asyncsrv::T_application_json, false); // auto-set to JSON
+                        } else {
+                            http->addHeader(asyncsrv::T_Content_Type, asyncsrv::T_text_plain, false); // auto-set to JSON
+                        }
+                    }
+                    httpResult = http->POST(value.c_str());
+                } else {
+                    httpResult = http->GET(); // normal GET
+                    if (httpResult > 0) {
+                        result = http->getString().c_str();
+                    }
+                }
+            }
+            http->end();
+            delete http;
+            // check HTTP return code
+            if (httpResult != 200) {
+                EMSESP::logger().warning("Schedule '%s': URL command failed with http code %d", name, httpResult);
                return false;
            }
 #if defined(EMSESP_DEBUG)
-            char msg[100];
-            snprintf(msg, sizeof(msg), "Schedule %s: URL command successful with http code %d", name, httpResult);
-            EMSESP::logger().debug(msg);
+            EMSESP::logger().debug("Schedule %s: URL '%s' command successful with http code %d", name, url.c_str(), httpResult);
 #endif
            return true;
        }
--- a/src/web/WebSettingsService.cpp
+++ b/src/web/WebSettingsService.cpp
@@ -83,6 +83,20 @@ void WebSettings::read(WebSettings & settings, JsonObject root) {
    root["modbus_max_clients"]    = settings.modbus_max_clients;
    root["modbus_timeout"]        = settings.modbus_timeout;
    root["developer_mode"]        = settings.developer_mode;
+#ifndef NO_TLS_SUPPORT
+    root["email_enabled"] = settings.email_enabled;
+#else
+    root["email_enabled"] = false;
+#endif
+    root["email_ssl"]      = settings.email_ssl;
+    root["email_starttls"] = settings.email_starttls;
+    root["email_server"]   = settings.email_server;
+    root["email_port"]     = settings.email_port;
+    root["email_login"]    = settings.email_login;
+    root["email_pass"]     = settings.email_pass;
+    root["email_sender"]   = settings.email_sender;
+    root["email_recp"]     = settings.email_recp;
+    root["email_subject"]  = settings.email_subject;
 }

 // call on initialization and also when settings are updated/saved via web or console
@@ -242,14 +256,10 @@ StateUpdateResult WebSettings::update(JsonObject root, WebSettings & settings) {
    check_flag(original_settings.low_clock, settings.low_clock, ChangeFlags::RESTART);

    // Modbus settings
-    settings.modbus_enabled = root["modbus_enabled"] | EMSESP_DEFAULT_MODBUS_ENABLED;
-    check_flag(original_settings.modbus_enabled, settings.modbus_enabled, ChangeFlags::RESTART);
-    settings.modbus_port = root["modbus_port"] | EMSESP_DEFAULT_MODBUS_PORT;
-    check_flag(original_settings.modbus_port, settings.modbus_port, ChangeFlags::RESTART);
+    settings.modbus_enabled     = root["modbus_enabled"] | EMSESP_DEFAULT_MODBUS_ENABLED;
+    settings.modbus_port        = root["modbus_port"] | EMSESP_DEFAULT_MODBUS_PORT;
    settings.modbus_max_clients = root["modbus_max_clients"] | EMSESP_DEFAULT_MODBUS_MAX_CLIENTS;
-    check_flag(original_settings.modbus_max_clients, settings.modbus_max_clients, ChangeFlags::RESTART);
-    settings.modbus_timeout = root["modbus_timeout"] | EMSESP_DEFAULT_MODBUS_TIMEOUT;
-    check_flag(original_settings.modbus_timeout, settings.modbus_timeout, ChangeFlags::RESTART);
+    settings.modbus_timeout     = root["modbus_timeout"] | EMSESP_DEFAULT_MODBUS_TIMEOUT;

    //
    // these may need mqtt restart to rebuild HA discovery topics
@@ -300,6 +310,20 @@ StateUpdateResult WebSettings::update(JsonObject root, WebSettings & settings) {
    settings.weblog_level   = root["weblog_level"] | EMSESP_DEFAULT_WEBLOG_LEVEL;
    settings.weblog_compact = root["weblog_compact"] | EMSESP_DEFAULT_WEBLOG_COMPACT;

+    settings.email_enabled  = root["email_enabled"] | FACTORY_EMAIL_ENABLE;
+    settings.email_ssl      = root["email_ssl"] | FACTORY_EMAIL_SSL;
+    settings.email_starttls = root["email_starttls"] | FACTORY_EMAIL_STARTTLS;
+    settings.email_server   = root["email_server"] | FACTORY_EMAIL_SERVER;
+    settings.email_port     = root["email_port"] | FACTORY_EMAIL_PORT;
+    settings.email_login    = root["email_login"] | FACTORY_EMAIL_LOGIN;
+    settings.email_pass     = root["email_pass"] | FACTORY_EMAIL_PASSWORD;
+    settings.email_sender   = root["email_sender"] | FACTORY_EMAIL_FROM;
+    settings.email_recp     = root["email_recp"] | FACTORY_EMAIL_TO;
+    settings.email_subject  = root["email_subject"] | FACTORY_EMAIL_SUBJECT;
+
+    if (settings.email_ssl && settings.email_starttls) {
+        settings.email_ssl = false;
+    }
    // if no psram limit weblog buffer to 25 messages
    if (EMSESP::system_.PSram() > 0) {
        settings.weblog_buffer = root["weblog_buffer"] | EMSESP_DEFAULT_WEBLOG_BUFFER;
@@ -458,23 +482,14 @@ void WebSettings::set_board_profile(WebSettings & settings) {
 #if CONFIG_IDF_TARGET_ESP32
        // check for no PSRAM, could be a E32 or S32?
        if (!ESP.getPsramSize()) {
-#if ESP_ARDUINO_VERSION_MAJOR < 3
-            if (ETH.begin(1, 16, 23, 18, ETH_PHY_LAN8720, ETH_CLOCK_GPIO0_IN)) {
-#else
            if (ETH.begin(ETH_PHY_LAN8720, 1, 23, 18, 16, ETH_CLOCK_GPIO0_IN)) {
-#endif
                settings.board_profile = "E32"; // Ethernet without PSRAM
            } else {
                settings.board_profile = "S32"; // ESP32 standard WiFi without PSRAM
            }
        } else {
-// check for boards with PSRAM, could be a E32V2 otherwise default back to the S32
-#if ESP_ARDUINO_VERSION_MAJOR < 3
-            if (ETH.begin(0, 15, 23, 18, ETH_PHY_LAN8720, ETH_CLOCK_GPIO0_OUT)) {
-#else
+            // check for boards with PSRAM, could be a E32V2 otherwise default back to the S32
            if (ETH.begin(ETH_PHY_LAN8720, 0, 23, 18, 15, ETH_CLOCK_GPIO0_OUT)) {
-#endif
-
                if (analogReadMilliVolts(39) > 700) {   // core voltage > 2.6V
                    settings.board_profile = "E32V2_2"; // Ethernet, PSRAM, internal sensors
                } else {
--- a/src/web/WebSettingsService.h
+++ b/src/web/WebSettingsService.h
@@ -26,6 +26,36 @@
 #define EMSESP_SETTINGS_SERVICE_PATH "/rest/settings"
 #define EMSESP_BOARD_PROFILE_SERVICE_PATH "/rest/boardProfile"

+#ifndef FACTORY_EMAIL_ENABLE
+#define FACTORY_EMAIL_ENABLE false
+#endif
+#ifndef FACTORY_EMAIL_SSL
+#define FACTORY_EMAIL_SSL false
+#endif
+#ifndef FACTORY_EMAIL_STARTTLS
+#define FACTORY_EMAIL_STARTTLS true
+#endif
+#ifndef FACTORY_EMAIL_PORT
+#define FACTORY_EMAIL_PORT 587
+#endif
+#ifndef FACTORY_EMAIL_SERVER
+#define FACTORY_EMAIL_SERVER "smtp.example.net"
+#endif
+#ifndef FACTORY_EMAIL_LOGIN
+#define FACTORY_EMAIL_LOGIN ""
+#endif
+#ifndef FACTORY_EMAIL_PASSWORD
+#define FACTORY_EMAIL_PASSWORD ""
+#endif
+#ifndef FACTORY_EMAIL_FROM
+#define FACTORY_EMAIL_FROM "ems-esp@example.net"
+#endif
+#ifndef FACTORY_EMAIL_TO
+#define FACTORY_EMAIL_TO ""
+#endif
+#ifndef FACTORY_EMAIL_SUBJECT
+#define FACTORY_EMAIL_SUBJECT "ems-esp notification"
+#endif
 namespace emsesp {

 class WebSettings {
@@ -77,6 +107,16 @@ class WebSettings {
    uint16_t modbus_port;
    uint8_t  modbus_max_clients;
    uint32_t modbus_timeout;
+    bool     email_enabled;
+    bool     email_ssl;
+    bool     email_starttls;
+    String   email_server;
+    uint16_t email_port;
+    String   email_login;
+    String   email_pass;
+    String   email_sender;
+    String   email_recp;
+    String   email_subject;

    uint8_t phy_type;
    int8_t  eth_power; // -1 means disabled
Author	SHA1	Message	Date
Proddy	d18e5b1f14	Merge pull request #3041 from proddy/core3 Core3 sync	2026-04-22 16:09:58 +02:00
proddy	20327d817d	async-validator fixes	2026-04-22 16:07:59 +02:00
proddy	051c332426	package update	2026-04-22 15:43:46 +02:00
proddy	a09258325e	remove YIELD	2026-04-22 15:43:36 +02:00
proddy	61dca0cbda	https://github.com/emsesp/EMS-ESP32/issues/2686	2026-04-22 15:43:10 +02:00
Proddy	2bff299193	Merge pull request #3037 from MichaelDvP/core3 Core3 update	2026-04-22 15:26:26 +02:00
MichaelDvP	1329b13db3	Merge branch 'dev' into core3	2026-04-22 15:05:39 +02:00
MichaelDvP	9dd894f0fe	Merge branch 'dev' of https://github.com/emsesp/EMS-ESP32 into core3	2026-04-22 10:14:34 +02:00
MichaelDvP	30d1ae5642	update otadata when littlefs fails	2026-04-22 08:21:29 +02:00
MichaelDvP	79aceef382	Merge branch 'core3' of https://github.com/emsesp/EMS-ESP32 into core3	2026-04-22 07:51:58 +02:00
MichaelDvP	a28e52210a	Merge branch 'dev' into core3	2026-04-22 07:50:43 +02:00
MichaelDvP	08eb294213	update readymail	2026-04-22 07:26:17 +02:00
MichaelDvP	888baed81a	pkg update	2026-04-21 21:39:10 +02:00
MichaelDvP	4de3955db2	set partition after update	2026-04-21 21:38:52 +02:00
MichaelDvP	25f08c7624	Merge branch 'dev' into core3	2026-04-21 20:44:02 +02:00
proddy	1e8013100c	rename build-webUI with build_webUI	2026-04-20 15:46:54 +02:00
proddy	62c8f55568	package update (vite fix)	2026-04-20 15:46:39 +02:00
Proddy	c40d828749	Merge pull request #3031 from proddy/core3 build_webUI -> build-webUI	2026-04-19 19:15:28 +02:00
proddy	84ad08887a	build_webUI -> build-webUI	2026-04-19 19:13:15 +02:00
MichaelDvP	ed0a678020	Merge branch 'dev' of https://github.com/emsesp/EMS-ESP32 into core3	2026-04-19 15:49:36 +02:00
Proddy	37107d8500	Merge pull request #3029 from proddy/core3 sync memory optimizations from dev-16 to core3	2026-04-19 15:15:14 +02:00
proddy	dde6a8c5db	close dialog after download	2026-04-19 15:10:51 +02:00
proddy	e2750b8572	don't show system backup as its the same page!	2026-04-19 15:10:41 +02:00
proddy	acd23925b5	download text changes	2026-04-19 15:10:20 +02:00
proddy	b0db054e11	fix firmware install date (was using UTC as TZ not initialised)	2026-04-19 14:17:31 +02:00
proddy	51cea8e757	no need to call ntp on begin as its in the loop	2026-04-19 13:15:11 +02:00
proddy	bbb086ea41	add back NTP	2026-04-19 13:14:54 +02:00
proddy	539e6ed080	remove lazy loading	2026-04-19 10:17:10 +02:00
proddy	1d33a26318	fix dns name being set to "tasmota"	2026-04-18 19:42:45 +02:00
proddy	86a20fc97a	sync with dev-16	2026-04-18 18:54:33 +02:00
proddy	d6e00c4534	UART_FIFO_LEN is deprecated	2026-04-18 18:50:08 +02:00
Proddy	a813d38108	Merge pull request #3025 from MichaelDvP/core3 Core3	2026-04-17 15:44:51 +02:00
MichaelDvP	685a49c212	Merge branch 'dev' into core3, formatting, add back sendmail settings	2026-04-17 12:28:41 +02:00
Proddy	2c8eb534af	Merge pull request #3022 from proddy/core3 fix merge errors	2026-04-16 08:46:06 +02:00
proddy	5210fab4cb	switch to C++20 for string find commands	2026-04-16 08:45:07 +02:00
proddy	49787d27f1	add missing code lost in merge	2026-04-16 08:44:55 +02:00
proddy	dfe7b46461	remove unused http	2026-04-16 08:44:44 +02:00
Proddy	f8257de0dd	Merge pull request #3009 from MichaelDvP/core3 https client for scheduler/shuntingYard	2026-04-15 21:34:03 +02:00
Proddy	3b3ecc9f1d	Merge branch 'core3' into core3	2026-04-15 21:33:27 +02:00
proddy	84105acf5d	3.9.0-dev.0	2026-04-15 20:48:11 +02:00
proddy	def5173692	fix merge issues	2026-04-15 20:37:33 +02:00
proddy	6b31fef1af	build on mac osx	2026-04-15 20:37:27 +02:00
Proddy	c9c059ca65	Merge pull request #3020 from proddy/core3 sync with dev	2026-04-15 09:26:32 +02:00
proddy	4d3b31e5a1	sync with dev	2026-04-15 09:25:38 +02:00
MichaelDvP	51d90095aa	https client for scheduler/shuntingYard	2026-04-04 11:39:43 +02:00
Proddy	16c0370443	Merge pull request #3005 from proddy/core3 Core3 updates	2026-03-30 23:25:22 +02:00
proddy	67bb38dcf4	updated test data	2026-03-30 23:24:35 +02:00
proddy	049231a36e	minor text changes	2026-03-30 23:15:18 +02:00
proddy	349d6b7375	package update	2026-03-30 23:15:07 +02:00
proddy	b72b368d3c	ArduinoJson @ 7.4.3	2026-03-30 23:15:00 +02:00
proddy	7f9fd44a02	C14	2026-03-30 21:27:26 +02:00
proddy	a400c5974c	comment change	2026-03-30 21:09:59 +02:00
proddy	afca995fe5	remove poll check	2026-03-30 21:06:08 +02:00
proddy	81504fedc5	package update	2026-03-30 21:05:55 +02:00
proddy	3da3345683	fix poll_match_count	2026-03-29 16:30:38 +02:00
Proddy	c6c2889306	Merge branch 'dev' into core3	2026-03-29 15:58:45 +02:00
proddy	b60f0d260a	updated tests	2026-03-29 15:55:02 +02:00
proddy	cd750e4777	text change	2026-03-29 15:44:39 +02:00
proddy	4e5d503b35	remove mbedtls, update ArduinoJson	2026-03-29 15:44:27 +02:00
proddy	bd09e17e49	3.8.2-dev.C13	2026-03-29 15:43:44 +02:00
proddy	835eb743bb	backup/restore #3002	2026-03-29 15:43:35 +02:00
proddy	69a129d80e	move NVS initisalisation higher, add check for poll_id == bus ID	2026-03-29 15:43:03 +02:00
proddy	434bf483fd	added comment	2026-03-29 15:41:57 +02:00
proddy	2b8e170b40	text changes	2026-03-29 15:41:46 +02:00
proddy	dc9b95f3e7	updated to prevent warning on WiFI mode (shown in debug mode)	2026-03-29 15:41:23 +02:00
proddy	1616b0da0a	package update	2026-03-29 15:41:03 +02:00
proddy	91c457b22b	don't show EMS bus error on Dashboard, only devices	2026-03-29 15:40:40 +02:00
proddy	70c60647c7	refresh changed from 3 to 5 seconds	2026-03-29 15:40:19 +02:00
Proddy	c0bea66d27	Merge pull request #2996 from MichaelDvP/core3	2026-03-22 10:12:08 +01:00
MichaelDvP	ed7cc078ed	fix testdata	2026-03-22 09:53:21 +01:00
Proddy	60b7d6d795	Merge pull request #2995 from MichaelDvP/core3 Core3 updates, adapt to c6 and c3 chips	2026-03-21 18:02:49 +01:00
MichaelDvP	947f29cca0	Merge branch 'core3' of https://github.com/emsesp/EMS-ESP32 into core3	2026-03-21 16:47:05 +01:00
MichaelDvP	d2a13ec0da	core3 adaptions for c3 and c6, compiles for all chips	2026-03-21 16:23:07 +01:00
proddy	cc39ba409e	package update	2026-03-21 15:49:14 +01:00
MichaelDvP	ac9db6256e	Merge branch 'dev' into core3	2026-03-21 11:19:05 +01:00
MichaelDvP	096f628d97	Merge branch 'core3' of https://github.com/emsesp/EMS-ESP32 into core3	2026-03-21 11:02:41 +01:00
proddy	22312812bb	system backup	2026-03-20 17:14:58 +01:00
MichaelDvP	3584975acb	env: c6	2026-03-19 16:43:18 +01:00
MichaelDvP	30b9ca4e6c	Merge branch 'core3' of https://github.com/emsesp/EMS-ESP32 into core3	2026-03-19 16:41:21 +01:00
MichaelDvP	7c6ff01ebe	reset reason, uart adapt for C6	2026-03-19 16:39:27 +01:00
proddy	a54edcaf5b	formatting	2026-03-18 20:51:40 +01:00
proddy	e446954844	#2971	2026-03-18 20:45:36 +01:00
proddy	4a2d0d6787	package update	2026-03-18 20:35:55 +01:00
proddy	9725314135	Platform 2026.03.50 Tasmota Arduino Core 3.3.7 based on IDF 5.5.3.260313 and ESP32Async/ESPAsyncWebServer @ 3.10.3	2026-03-18 20:18:59 +01:00
MichaelDvP	e610f0d57f	Merge branch 'core3' of https://github.com/emsesp/EMS-ESP32 into core3	2026-03-18 14:21:59 +01:00
MichaelDvP	8244af2940	Merge branch 'dev' into core3, fix #2988	2026-03-18 11:47:16 +01:00
proddy	40f371d23b	remove check for downloadOnly	2026-03-17 22:01:38 +01:00
proddy	817b791e59	remove flto	2026-03-17 21:47:12 +01:00
proddy	25a7aac360	lint warning fix	2026-03-17 21:47:01 +01:00
proddy	37115a174d	show size of firmware not partition	2026-03-17 21:46:51 +01:00
proddy	1397f81fd0	add C in version so we know its Core	2026-03-17 21:46:27 +01:00
proddy	56365cb403	formatting	2026-03-17 21:46:15 +01:00
proddy	dfd245ee7b	rename common.h	2026-03-17 21:45:12 +01:00
proddy	9c81e4b34d	optimize for vite v8	2026-03-17 21:44:38 +01:00
proddy	67676df131	package update	2026-03-17 21:44:29 +01:00
proddy	a73b129596	update vite v8	2026-03-17 21:44:17 +01:00
Proddy	4600d886b5	Merge pull request #2986 from MichaelDvP/core3 update Core3, change TLS library	2026-03-17 20:27:45 +01:00
MichaelDvP	0fe45a2405	use ESP_SSLClient for mqtt, add sendmail command (using readymail)	2026-03-17 18:53:37 +01:00
MichaelDvP	db87213242	Merge branch 'dev' into core3	2026-03-17 10:19:26 +01:00
MichaelDvP	5c3c010d5a	Merge branch 'dev' into core3	2026-03-16 14:02:02 +01:00
MichaelDvP	c804cedd7a	update changelog	2026-03-16 14:01:45 +01:00
MichaelDvP	aa30ca99bf	update core	2026-03-15 21:41:18 +01:00
MichaelDvP	c0ca9d1069	update pkg	2026-03-15 16:13:50 +01:00
MichaelDvP	5e79e1d57f	more messages on network connect	2026-03-15 16:13:21 +01:00
MichaelDvP	8c732f9f1e	allow modbus start/stop without reboot	2026-03-15 16:12:50 +01:00
MichaelDvP	5e94c2f636	Merge branch 'dev' into core3	2026-03-15 16:11:36 +01:00
MichaelDvP	64e5d29996	fix typo in HA-climate creation	2026-02-17 09:23:20 +01:00
Proddy	b320d8ded2	Merge pull request #2963 from MichaelDvP/core3 Core3 network fixes	2026-02-16 18:12:33 +01:00
MichaelDvP	0be1b20996	statemachine for network connection replaces onEvent	2026-02-16 10:37:28 +01:00
MichaelDvP	6c55460622	Merge branch 'dev' into core3	2026-02-16 08:34:23 +01:00
MichaelDvP	d627404dc2	skip onEvent for AP, MQTT, NTP	2026-02-16 07:47:13 +01:00
proddy	f317123c26	fix standalone	2026-02-15 15:27:11 +01:00
proddy	e4df1887b0	remove	2026-02-15 14:16:55 +01:00
proddy	34142c3e85	use Tasmota everywhere	2026-02-15 14:16:50 +01:00
proddy	6e7f8bdf02	add -DNO_TLS_SUPPORT	2026-02-15 14:16:27 +01:00
proddy	3dd9fcfb58	update	2026-02-15 14:16:04 +01:00
proddy	35e2954b8b	fix lint errors	2026-02-15 14:15:55 +01:00
proddy	59aa63db0f	package update	2026-02-15 14:15:43 +01:00
proddy	7a41a190f8	support s3	2026-02-15 14:15:13 +01:00
proddy	6741232450	WIP: ESP-IDF Core 3 migration - mbedtls SSL, module library, board configs, MQTT and network updates	2026-02-15 13:53:13 +01:00