From 1ae2a624f768d22a0bcd6f5a349f5f8e1b2a90a1 Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Mon, 11 Dec 2023 09:12:23 +0100
Subject: [PATCH] add back lowres dewtemp, #1491

---
 src/devices/thermostat.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index c0f6176bb..30602656a 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -712,6 +712,15 @@ 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_INT_NOTSET && dewtemperature_ != dew * 10) {
+            dewtemperature_ = dew * 10;
+            has_update(dewtemperature_);
+        }
+    }
 }
 
 // 0x273 - for reading temperaturcorrection from the RC100H remote thermostat (0x38, 0x39, ..)