"floor" current of 2.9 mA with code migrated to SDK15 (from SDK12)

[ThierryC]

I have an existing Firmware (build on Crossworks) that has correct "floor" power consumption (< 10 uA during sd_app_evt_wait() on my setup).

I migrate my code to rune with SDK15 (mainly changed SoftDevice API) and after that, I have a constant current consumption of about 2.9 mA !

Note that after SYSTEMOFF, I can correctly be < 1 uA.

So apparently I missed something during my porting and it seems that a resource is constantly alive. But I cannot figure out what it is.

Any hint to debug such issues ? Any register to check and see which resources are activated ?

Any suggestion or link to similar issue is welcome to help me to progress on this issue.

[Kenneth]

In general you may check out:
https://devzone.nordicsemi.com/b/blog/posts/optimizing-power-on-nrf52-designs

You may also take a look at the nrf_pwr_mgmt_run() implementation from the nRF SDK.

[ThierryC]

Thanks for the link.
On my case, I'm not using the nrf_power_mgmt module. I'm calling directly sd_app_evt_wait(). Which is working fine of SDK12, but maybe I missed something.
I'll investigate more in this direction.