RE: How to make Nrf51822 wake up by button, increment variable then sleep

Stefan Birnir Sverrisson — Tue, 11 Aug 2015 09:41:42 GMT

The system-on-wakeup-on-gpio is the most simple example for going to sleep, and wake up again on a button press. It is without using a softdevice. References to other useful examples can be fount in the current consumption guide, section "Measure current consumption"

RE: How to make Nrf51822 wake up by button, increment variable then sleep

michaeld — Tue, 11 Aug 2015 09:26:26 GMT

In my tests with the sleeping and system-off modes is that the devices automatically sleeps when it does nothing. This what the function power_manage() is for. I have seen hardly any difference in current consumption when sleeping or when in power_manage.

It's more power efficient to go to system-off but then you'll need to save all your values in flash or use pstorage.

If sleeping is enough for you then I would just add the button handler and increment when button is pushed.

You can use this: devzone.nordicsemi.com/.../

Or use App_button library there are many examples and questions about this topic that can help you.