Xiaomi SmartMi Humidifier 2 emulator for 100% tray sensor
Emulator for burned water level sensor. Always sends full water tray packet.
C# source and arduino project for ATTiny85 available.
The best place for this chip to be placed is instead of burned water level sensor, there are TX, GND and 5V.
On ATTiny85 use GND, 5V and P2 for TX
ATTiny85 https://s.click.aliexpress.com/e/_dTkNoDh
Video demonstration https://www.youtube.com/watch?v=Pm4rbp3xFk0