Determine deep sleep duration

[Mark Ruys]

I would like to know how long an xDot was in deep sleep after it waked up from an interrupt on the WAKE pin. clock() resets itself, as us_ticker_read() does.

And is there a way to determine whether the xDot was restarted after a deepsleep from an RTC_ALARM or because of an INTERRUPT?

Thanks, Mark

[Mike Fiore]

Mark,

You could use the RTC to see how long the xDot was sleeping. Just save the time to the EEPROM before going to sleep and compare to the time after you wake up.

We don’t currently have a method to let you know what the wakeup source was, but it’s on our list. I’ll see if I can get it into the next release.

Cheers,
Mike

[Mark Ruys]

I completely overlooked that the RTC survives a deepsleep. So time() is just what I need, thanks.

We expect our sensors to go to deepsleep about 50.000 times during their life time. EEPROM handles minimal 300.000 erase/write cycles, so we’re good 🙂

In our case I can determine the cause of the wake up by checking the WAKE pin.

Best,
Mark

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