simple platform.io project, build for a 01Space/ESP32-C3-0.42LCD development board used with a DHT11 Sensor to measure temperature+humidity and publish it to a mqtt server, for cosumption by Home Assistants MQTT integration (supports discovery).

Clone project, copy include/config.h-dist to include/config.h, edit config to fit your setup (PIN, Wifi, MQTT Server/Sensor Name/ID) get dependenies with platform io, build and flash to your development board.

It should flash a connecting to Wi-Fi message a few times (if it keeps doing that it can’t), then it will flash a connecting to MQTT server (if it keeps doing that it can’t), and ultimately it will publish and show the measured temperature and humidity (if constant at -1 while not being at -1, then its not reading anything).

Temperature is always in celsius.

All you need to do is have an MQTT Broker available (I use the mosquito add-on for home assistant), the MQTT Integration enabled, and discover mode on, and the sensor will automatically appear as an entity, if everything is working.

MIT style, see LICENSE.md file

• Author Peter Petermann
• Framework used PlatformIO
• Development Board 01Space/ESP32-C3-0.42LCD – Buy Here
• Sensor DHT11
• Home Assistant