wake from sys_poweroff()

[PeterRasmussen]

Hey

Im trying to as low power consumption as possible and for that i have found that sys_poweroff() gives me that. 

My problem is that i cannot get a pin state change to wake the system afterwards. 

I have the following logic:

int main(void) {

    // enable irq on gpio0, 23

    if (!pwr_btn_pressed()) {
        sys_poweroff();
    }
    
    // do stuff
}

Can anyone help me understand what im doing wrong? 

[Vidar Berg]

Hello,

Pins to be used for wake-up must be configured with the Pin sense mechanism enabled. The GPIOTE peripheral which enable pin interrupts when the chip is active or in System ON idle mode is not powered in System OFF mode. 

The sense mechanism is enabled when you configure the pins with gpio_pin_interrupt_configure_dt() using the *_LEVEL_* triggering flags as shown here: https://github.com/nrfconnect/sdk-zephyr/blob/0439c7a202372dad8b441c6b81509f04f6e751b1/samples/boards/nrf/system_off/src/main.c#L55C7-L55C38. Another alternative is to use the GPIO HALs to configure the pin: https://github.com/nrfconnect/sdk-zephyr/blob/0933a4b2949889ca924b10aff05b1093dabe7ba0/samples/boards/nrf/system_off/src/main.c#L67 

Best regards,

Vidar