How to periodically wake up the nrf52 from PM_STATE_SOFT_OFF?

[binhla]

Dear all,

My application is build on nrf52, nrf connect SDK v2.0.0.

For energy saving purpose, I put the nrf52 into sleep mode, using these code

const struct pm_state_info si = {PM_STATE_SOFT_OFF, 0, 0};
pm_state_force(0, &si);

And wake up via GPIOs.

But the wake up source via GPIOs may not available for a long time.

I want to have it wake up periodically, and the period should be configurable.

Please help.

Thank in advance.

[Kenneth]

I want to have it wake up periodically, and the period should be configurable.

Then you can't use system off, since system off can only wakeup from gpio, nfc and lpcomp.

Kenneth