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Linux/BEAGLEBK: RTC wakeup from low-power mode

Part Number: BEAGLEBK


Tool/software: Linux

Hi,

I am using a Beagle Bone Black and I am trying to get it to wake up from low power mode using 'RTCWake'

Doing so as follows:

root@beaglebone:/home/tony# rtcwake -m mem -s 20

The device goes to sleep and never wakes up, even though the -s 20 argument tells it that it should wake up in 20 seconds.

Doing some research I noted that you can apparently only wake it up using some form of external sourced wake up.

My question is: Is there a way to make it work so that it will wake up using a real-time clock (RTC)?

Ideally someone knows how to do that programmatically.

I'm running Debian:

> Linux beaglebone 4.9.78-ti-r94 #1 SMP PREEMPT Fri Jan 26 21:26:24 UTC 2018 armv7l