This usermod adds the temperature readout to the Info tab and also publishes that over the topic mcutemp topic.
A shown temp of 53,33°C might indicate that the internal temp is not supported.
ESP8266 does not have a internal temp sensor
ESP32S2 seems to crash on reading the sensor -> disabled
Add a build flag -D USERMOD_INTERNAL_TEMPERATURE to your platformio.ini (or platformio_override.ini).
Soeren Willrodt @lost-hope
Dimitry Zhemkov @dima-zhemkov