Thingy 91: Deep sleep firmware for nRF52840?

[Bjorn191023]

Hi,

We plan to measure the sleep current of the *whole* Thingy 91 system including nRF9160, nRF52840 and sensors. Do you have a firmware (sample app or similar) that puts the nRF52850 in deep sleep (the MCU including all peripehrals, GPIOs etc) so we can take this SoC out of the equation to begin with? 

BR / Björn

[Stian Røed Hafskjold]

Hi, sorry for the late reply. You can set the MCU to system OFF mode.

void main(void){
    NRF_REGULATORS->SYSTEMOFF = 1;
    for(;;){}
}

It will now consume around 1uA