diff --git a/lib/espMqttClient/src/Config.h b/lib/espMqttClient/src/Config.h
index 2e6d4dade..940c2dea8 100644
--- a/lib/espMqttClient/src/Config.h
+++ b/lib/espMqttClient/src/Config.h
@@ -8,10 +8,6 @@ the LICENSE file.
 
 #pragma once
 
-#if CONFIG_IDF_TARGET_ESP32S3
-// #define EMC_CLIENT_SECURE
-#endif
-
 #ifndef EMC_TX_TIMEOUT
 #define EMC_TX_TIMEOUT 2000
 #endif
diff --git a/lib/espMqttClient/src/Transport/ClientSecureSync.h b/lib/espMqttClient/src/Transport/ClientSecureSync.h
index c29b03d2f..77d425efb 100644
--- a/lib/espMqttClient/src/Transport/ClientSecureSync.h
+++ b/lib/espMqttClient/src/Transport/ClientSecureSync.h
@@ -11,11 +11,7 @@ the LICENSE file.
 #if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
 
 #include "../Config.h"
-#if defined(EMC_CLIENT_SECURE)
 #include <WiFiClientSecure.h>  // includes IPAddress
-#else
-#include <WiFiClient.h>
-#endif
 
 #include "Transport.h"
 
@@ -31,11 +27,7 @@ class ClientSecureSync : public Transport {
   void stop() override;
   bool connected() override;
   bool disconnected() override;
-#if defined(EMC_CLIENT_SECURE)
   WiFiClientSecure client;
-#else
-  WiFiClient client;
-#endif
 };
 
 }  // namespace espMqttClientInternals
diff --git a/lib/espMqttClient/src/espMqttClient.cpp b/lib/espMqttClient/src/espMqttClient.cpp
index bd9b6935a..833ece10b 100644
--- a/lib/espMqttClient/src/espMqttClient.cpp
+++ b/lib/espMqttClient/src/espMqttClient.cpp
@@ -78,37 +78,27 @@ espMqttClientSecure::espMqttClientSecure(uint8_t priority, uint8_t core)
 }
 
 espMqttClientSecure& espMqttClientSecure::setInsecure() {
-#if defined(EMC_CLIENT_SECURE)
   _client.client.setInsecure();
-#endif
   return *this;
 }
 
 espMqttClientSecure& espMqttClientSecure::setCACert(const char* rootCA) {
-#if defined(EMC_CLIENT_SECURE)
   _client.client.setCACert(rootCA);
-#endif
   return *this;
 }
 
 espMqttClientSecure& espMqttClientSecure::setCertificate(const char* clientCa) {
-#if defined(EMC_CLIENT_SECURE)
   _client.client.setCertificate(clientCa);
-#endif
   return *this;
 }
 
 espMqttClientSecure& espMqttClientSecure::setPrivateKey(const char* privateKey) {
-#if defined(EMC_CLIENT_SECURE)
   _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);
-#endif
   return *this;
 }
 
diff --git a/platformio.ini b/platformio.ini
index 349365e6c..dc7cdad3d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -33,7 +33,7 @@ build_flags =
   -D NO_GLOBAL_ARDUINOOTA
   -D ARDUINOJSON_ENABLE_STD_STRING=1
   -D ARDUINOJSON_USE_DOUBLE=0
-  -D CONFIG_UART_ISR_IN_IRAM
+  ;-D CONFIG_UART_ISR_IN_IRAM
 
 unbuild_flags =
   ${common.core_unbuild_flags}
@@ -41,7 +41,6 @@ unbuild_flags =
 [espressi32_base]
 platform = espressif32@6.4.0
 framework = arduino
-board_build.filesystem = littlefs
 build_flags = ${common.build_flags}
 build_unflags = ${common.unbuild_flags}
 extra_scripts =
@@ -50,11 +49,10 @@ extra_scripts =
 
 [espressi32_base_tasmota]
 ; use Tasmota's libary which removes some libs (like mbedtsl) and increases available heap
-; platform = https://github.com/tasmota/platform-espressif32.git ; latest development
-platform = https://github.com/tasmota/platform-espressif32/releases/download/2023.10.03/platform-espressif32-2023.10.03.zip ; latest stable
-; platform = https://github.com/tasmota/platform-espressif32/releases/download/2023.10.02/platform-espressif32.zip
+; based on Core 2.0.12/ESP-IDF v4.4.5 https://github.com/espressif/arduino-esp32/releases/tag/2.0.12 use https://github.com/tasmota/platform-espressif32/archive/refs/tags/2023.09.00.zip
+; based on Core 2.0.13/ESP-IDF v4.4.5 https://github.com/espressif/arduino-esp32/releases/tag/2.0.13 use https://github.com/tasmota/platform-espressif32/releases/download/2023.09.01/platform-espressif32-2023.09.01.zip
+platform = https://github.com/tasmota/platform-espressif32/archive/refs/tags/2023.09.00.zip
 framework = arduino
-board_build.filesystem = littlefs
 build_flags = ${common.build_flags}
 build_unflags = ${common.unbuild_flags}
 extra_scripts =
@@ -67,6 +65,8 @@ monitor_raw = yes
 upload_speed = 921600
 build_type = release
 lib_ldf_mode = chain+
+; board_build.flash_mode = qio
+
 check_tool = cppcheck, clangtidy
 check_severity = high, medium
 check_flags =
@@ -76,25 +76,22 @@ check_flags =
 ; build for GitHub Actions CI
 ; the Web interface is built seperately
 [env:ci]
-platform = https://github.com/tasmota/platform-espressif32.git
-framework = arduino
+extends = espressi32_base_tasmota
 extra_scripts = scripts/rename_fw.py
 board = esp32dev
 board_build.partitions = esp32_partition_4M.csv
+board_build.filesystem = littlefs
 build_flags = ${common.build_flags}
 build_unflags = ${common.unbuild_flags}
 
 [env:ci_s3]
-platform = https://github.com/tasmota/platform-espressif32.git
-framework = arduino
+extends = espressi32_base
 extra_scripts = scripts/rename_fw.py
 board = lolin_s3
 board_build.f_cpu = 240000000L
 board_upload.flash_size = 16MB
 board_build.partitions = esp32_partition_16M.csv
-build_flags =
-  ${common.build_flags}
-  -O2
+build_flags = ${common.build_flags} -O2
 build_unflags = ${common.unbuild_flags}
 
 [env:esp32_4M]
@@ -102,24 +99,28 @@ extends = espressi32_base_tasmota
 board = esp32dev
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
+build_flags = ${common.build_flags} -Os
 
 [env:esp32_4Mplus]
 extends = espressi32_base_tasmota
 board = esp32dev
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_asym_partition_4M.csv
+build_flags = ${common.build_flags}
 
 [env:esp32_16M]
 extends = espressi32_base_tasmota
 board = esp32dev
 board_upload.flash_size = 16MB
 board_build.partitions = esp32_partition_16M.csv
+build_flags = ${common.build_flags}
 
 [env:lolin_c3_mini]
 extends = espressi32_base_tasmota
 board = lolin_c3_mini
 board_upload.flash_size = 4MB
-board_build.partitions = esp32_partition_4M.csv
+board_build.partitions = esp32_asym_partition_4M.csv
+build_flags = ${common.build_flags}
 
 ; lolin C3 mini v1 needs special wifi init.
 ; https://www.wemos.cc/en/latest/c3/c3_mini_1_0_0.html#about-wifi
@@ -127,16 +128,15 @@ board_build.partitions = esp32_partition_4M.csv
 extends = espressi32_base_tasmota
 board = lolin_c3_mini
 board_upload.flash_size = 4MB
-board_build.partitions = esp32_partition_4M.csv
-build_flags =
-  ${common.build_flags}
-  -DBOARD_C3_MINI_V1
+board_build.partitions = esp32_asym_partition_4M.csv
+build_flags = ${common.build_flags} -DBOARD_C3_MINI_V1
 
 [env:lolin_s2_mini]
 extends = espressi32_base_tasmota
 board = lolin_s2_mini
 board_upload.flash_size = 4MB
-board_build.partitions = esp32_partition_4M.csv
+board_build.partitions = esp32_asym_partition_4M.csv
+build_flags = ${common.build_flags}
 
 [env:lolin_s3]
 extends = espressi32_base
@@ -146,9 +146,7 @@ board_upload.flash_size = 16MB
 board_build.partitions = esp32_partition_16M.csv
 board_upload.use_1200bps_touch = false
 board_upload.wait_for_upload_port = false
-build_flags =
-  ${common.build_flags}
-  -O2
+build_flags = ${common.build_flags} -O2
 
 ; to build and run: pio run -e standalone -t exec
 [env:standalone]
@@ -183,4 +181,4 @@ build_src_filter =
   +<../lib/espMqttClient/src>
   +<../lib/espMqttClient/src/Transport>
 lib_compat_mode = off
-lib_ldf_mode = off
+lib_ldf_mode = off
\ No newline at end of file