From d83b56a13cb18f6cc382970241237b0ae2b52fbf Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Sat, 27 Jun 2026 13:03:10 +0200
Subject: [PATCH] calcutae dewtemp for Easycontrol, #3135

---
 CHANGELOG_LATEST.md        |  1 +
 src/core/roomcontrol.h     |  4 ++--
 src/devices/thermostat.cpp | 17 ++++++++---------
 src/emsesp_version.h       |  2 +-
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/CHANGELOG_LATEST.md b/CHANGELOG_LATEST.md
index 1d968a2b6..ce20c2f80 100644
--- a/CHANGELOG_LATEST.md
+++ b/CHANGELOG_LATEST.md
@@ -18,3 +18,4 @@ For more details go to [emsesp.org](https://emsesp.org/).
 ## Changed
 
 - call compute value direct, enlarge TCP stack [#3127](https://github.com/emsesp/EMS-ESP32/discussions/3127)
+- Dewtemperature for Easycontrol calculated by ems-esp [3135](https://github.com/emsesp/EMS-ESP32/issues/3135)
diff --git a/src/core/roomcontrol.h b/src/core/roomcontrol.h
index 5b361cfe3..2bc61c1e5 100644
--- a/src/core/roomcontrol.h
+++ b/src/core/roomcontrol.h
@@ -34,7 +34,8 @@ class Roomctrl {
     static bool is_remote(const uint8_t hc) {
         return (hc < 4 && remotetemp_[hc] != EMS_VALUE_INT16_NOTSET);
     }
-    static void set_timeout(uint8_t t);
+    static void    set_timeout(uint8_t t);
+    static int16_t calc_dew(int16_t temp, uint8_t hum);
 
   private:
     static constexpr uint32_t SEND_INTERVAL = 15000; // 15 sec
@@ -50,7 +51,6 @@ class Roomctrl {
     static void    nack_write();
     static void    ack_write();
     static void    replyF7(uint8_t addr, uint8_t dst, uint8_t offset, uint8_t typehh, uint8_t typeh, uint8_t typel, uint8_t hc);
-    static int16_t calc_dew(int16_t temp, uint8_t hum);
 
     static bool     switch_off_[HCS];
     static uint32_t send_time_[HCS];
diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index eb9b2ef01..8f5441cc3 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -810,16 +810,15 @@ void Thermostat::process_RemoteTemp(std::shared_ptr<const Telegram> telegram) {
 // e.g. "38 10 FF 00 03 7B 08 24 00 4B"
 void Thermostat::process_RemoteHumidity(std::shared_ptr<const Telegram> telegram) {
     // has_update(telegram, dewtemperature_, 0); // this is int8
-    has_update(telegram, humidity_, 1);
-    has_update(telegram, dewtemperature_, 2); // this is int16
     // some thermostats use short telegram with int8 dewpoint, https://github.com/emsesp/EMS-ESP32/issues/1491
-    if (telegram->offset == 0 && telegram->message_length < 4) {
-        int8_t dew = dewtemperature_ / 10;
-        telegram->read_value(dew, 0);
-        if (dew != EMS_VALUE_INT8_NOTSET && dewtemperature_ != dew * 10) {
-            dewtemperature_ = dew * 10;
-            has_update(dewtemperature_);
-        }
+    // but it's not a dewpoint in offset 0, removed, see https://github.com/emsesp/EMS-ESP32/issues/3135
+    has_update(telegram, humidity_, 1);
+    // has_update(telegram, dewtemperature_, 2); // this is int16
+    int16_t dew = EMS_VALUE_INT16_NOTSET;
+    if (telegram->read_value(dew, 2)) {
+        has_update(dewtemperature_, dew);
+    } else if (telegram->offset == 0 && telegram->message_length < 4) {
+        has_update(dewtemperature_, Roomctrl::calc_dew(tempsensor1_, humidity_));
     }
 }
 
diff --git a/src/emsesp_version.h b/src/emsesp_version.h
index 74e1e397b..3928edd22 100644
--- a/src/emsesp_version.h
+++ b/src/emsesp_version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "3.8.3-dev.7"
+#define EMSESP_APP_VERSION "3.8.3-dev.8"