@felmue thanks for this answer and the measurement results. 5 mA is a lot, and the calculations make sense to me.

So using M5.Power.timerSleep(x) causes a real shutdown + wake after x seconds? I didn´t use the M5 module, but I assume it uses the RTC to trigger the PMS150G after a certain amount of time to wake the ESP. Is this correct?

If so, how can I shut off the device? Is it enough to send a pulse (what is the timing for it) via GPIO44 (PWROFF_Pulse)?

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!