Hi,

I bought a M5PaperS3 to built a mobile WebDAV based calendar but I ran into some battery issues which I can´t explain. The device run for ~4 days before it becomes empty. I think either the MCU or another component doesn´t go to sleep.

It´s a minimal project that uses LVGL and FastEPD for the display.

What have I tested?

• I´ve checked the datasheet of the IMU to be sure it is in power down mode by default because I don´t use it yet (suspend mode after PoR)
• Disable WiFi, GPIO, etc. in ESP firmware
• Disable the eInk Display (added epaper.einkPower(false) to the ESP firmware)

Has someone done something similar and run into the same issues or can me help figuring out whats wrong here?

You can find the code here:
https://github.com/Kampi/Calendar

Thanks!