Guidance on implementation of LOW POWER MODE In my ncs board, i am using the new ncs sdk

[Antony_augustine_1969]

hey! So i require some guidance regarding the implementation of system ON low power mode in my sdk.

1. I have configured interrupts for all button press, so that the interrupt handler function resets the timer and switches the device back into normal state.

2. I have also implemented a timer that expires after 60 seconds, whose expiry function should push the device into low power mode.

3. I am not understanding how to implement system wide low power mode including BLE being low powered, in my sdk.

[Menon]

Hello,

For putting the device into deep sleep mode using a timer expiry of 60 seconds, you can use the power management mechanism provided by Zephyr, as mentioned in the Bluetooth: Peripheral power profiling documentation. CPU enters the idle state when kernel has nothing to schedule. This is managed by the Power Management Subsystem in Zephyr. See this section, you can also watch this video from zephyr explaining this in bit more details. Refer to the RT1060 System Off demo documentation. In this example, the system is turned off after enabling wakeup through a button press.

Kind Regards,

Abhijith

[Antony_augustine_1969]

void expiry_function(struct k_timer *timer)
{
	printk("timer expired, entering deep sleep mode\n");
	timer_expired = true;
	rc = pm_device_action_run(cons, PM_DEVICE_ACTION_SUSPEND);
	if(rc<0){
		printk("could not suspend console\n");
	}
   sys_poweroff();
	
} 

i have written this as the expiry function for the code, would this work with the same functionality