This add-on allows you to manage and program your ESP8266 and ESP32 based microcontrollers directly through Home Assistant with no programming experience required. All you need to do is write YAML configuration files; the rest (over-the-air updates, compiling) is all handled by ESPHome.
View the ESPHome documentation
With ESPHome, you can go from a few lines of YAML straight to a custom-made firmware. For example, to include a DHT22. temperature and humidity sensor, you just need to include 8 lines of YAML in your configuration file:
Then just click UPLOAD and the sensor will magically appear in Home Assistant:
