nrf52840 System ON Low power mode.

[Neeraj Dhekale]

Hello,

I am new in nordic previously I was working on Cypress controllers. I am trying to put the device in System ON Low power mode.

I have tried the below functions but there is not any effect on current consumption.

To make sure it will always be in an idle state, I am not doing anything in the main function is empty like below. But I am getting current consumption of around 430-440uA. When I remove cpuidle() function call then also current consumption remains the same.

void cpuidle(){

while (true)

{

k_cpu_idle();

}

}

void main(void)

{

cpuidle();

}

Also I have tried below function but I am getting undefined reference to `sd_app_evt_wait' error.

sd_app_evt_wait();

Please let me know am I doing anything wrong?

Thanks in advance.

Regards,

Neeraj Dhekale

[Vidar Berg]

Hello,

The high sleep current is  likely caused by the serial logging interface (UART) being enabled. Please try to disable it in your project by adding CONFIG_SERIAL=n to your prj.conf file.

Also, k_cpu_idle() is normally not used it the application code as we have the idle thread (CPU Idling) that gets executed whenever there are no pending tasks left.

Regards,

Vidar