Switching between power modes and soft reset (nRF51822)

[balaji]

Hi,

Is it possible to wakeup nrf51822 without using the GPIO peripheral's (i.e configuring a gpio button as a sense enabled)?

how to do soft reset?

Actually my requirement is, i need to put the controller in off mode for some minutes, then i need to wake it up without pressing any button's. Some sample codes will help me a lot.

Regards, Balaji

[Ole Morten]

In system off mode, all clocks will be turned off, and it is therefore not possible to wake up from this mode in any other way than by a GPIO or reset.

If you need to wake up after a certain time, you will have to use the RTC and system on, idle, mode. This can be done for example using the app_timer module, by just disabling the softdevice and all other peripherals that you don't need, start the timer and do sd_app_event_wait(). This should then consume 2-3 µA.

[balaji]

Thanks for your reply, Any sample code regarding your logic will give a clear idea to make it work on our project.