Flashing LYWSD03MMC temperature and humidity sensor

4 min read Home Automation
home-automation home-assistant

Xiaomi LYWSD03MMC

Xiaomi LYWSD03MMC sensors are ideal for monitoring temperature and humidity levels in your home. They are affordable and dependable. To connect them to Home Assistant, I opted to flash them with a custom firmware available in the project linked below:

Project: ATC_MiThermometer

To summarize the process:

  • Visit this link
  • Connect the device
  • Activate it
  • Flash the custom firmware: ATC_v47.bin
  • Begin the flashing process
  • After flashing, reconnect to the device (may require some waiting time) and set a new name

For additional guidance, check out this helpful thread: Home Assistant Xiaomi Mijia LYWSD03MMC Temperature and Humidity Sensor Tutorial