Powering on after calling shutdown() about m5epd HOT 2 CLOSED

Hi @uolot

from the M5Paper schematics there should be no difference about whether RTC (timer or alarm) or the power button is powering on the device. (I cannot test that myself as my M5Paper hasn't arrived yet.)

As an experiment, have you tried a timer wakeup using something like M5.shutdown(5)? Does that work as expected, i.e. wake up M5Paper after about 5 seconds?

BTW: judging from the picture on the back of the M5Paper the reset button has two functions depending on whether M5Paper is running from battery or USB. (Battery: turn off / USB: reset). So if your M5Paper is running from battery and in shutdown mode (turned off) already, pressing the reset button will do nothing.

Thanks
Felix

from m5epd.

I'm having a similar issue for a simple clock application that sleeps most of the time and wakes up once a minute and updates the time. Here are some steps that I did:

1. When the device wakes up I'm checking M5.BtnP.isPressed() and using it to distinguish between a manual turn on (the button is pressed) and an RTC wakeup, in which the button is not pressed.
2. I connected a LED to G32 to see when the RTC triggers and the device is turned on.

However, I'm stuck on the issue of how to send drawing commands to the EPD without doing M5.EPD.Clear(true). I.e. I'd like to update only a small region where I'm displaying the clock digits without clearing the whole screen. If I don't do M5.EPD.Clear() then there is garbage left in the display. Is there any solution to this?

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