How to tell deep sleep wake up reason between rising signal on wake up pin and RTC clock time out?

Firmware
2

Hi,

  1. The way I did it here, is to get Time.now() right before going to sleep, and then right after waking up. If less time elapsed than the timeout, then I assumed it was the pin. It works reliably for me.

  2. Another possibility is to read the state of the pin you are triggering on right after waking up. If you are waiting for a high or rising edge, and the pin is high, then you were probably awoken by the pin. However, I’m told this may not be reliable. I tested this method too, and it seemed reliable.

Anyway, I settled on using the first method above, and it has worked for me every 15 minutes for over 100 days now without getting it wrong.

  • Rich
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