If you have been tempted to try playing with cheap ESP8266 or ESP32 devices, give @esphome_ a try. It is so simple.
This is all what is needed to get a $3 ESP8266 track temp and humidity. 2/3rds is generated by the ESPHome wizard.
Auto-detected and integrated by @home_assistant
pic.twitter.com/aPSF8iRADM