hope soon will post my current project - "Level sensor for water softener". The device is ready and it is under testing now. It has to measure fluid level in the water softener, and to send notification if level is too low. This is the first time when I use deep-sleep mode for ESP32 board. So it is very interesting for how long my device will stay alive with one 18650 battery.
If this project was interesting for you, you could buy me a cofee :)