NRF52840 comsumes more energy when Soft Device is disabled

[mkt]

I have a NRF52840. To save some energy I wanted to disable the soft device so that there's no bluetooth activity at all. However instead of an average consumption of about 6 mA when it's enabled it rises to about 8 mA when it's disabled. I disabled it using nrf_sdh_disable_request. Any idea why that is? Do I have to prepare something or call something in advance before disabling it? Why isn't the power consumption going down? i woul've expected that.

Softdevice enabled:

Softdevice disabled:

[Susheel Nuguru]

This should not have happened. Can you please post the code snippet on the logic of how you are going to sleep? Are you using softdevice API to go to sleep even after disabling the softdevice?

[mkt]

I'm using `nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_STAY_IN_SYSOFF);` to shut down the MCU. 

[Susheel Nuguru]

something wrong seems to be happening inside components\libraries\pwr_mgmt\nrf_pwr_mgmt.c:shutdown_process(). Can you see if there are errors returned anywhere when this function is called after the softdevice is disabled?

[mkt]

Sure, I can check for errors. I'll come back to you

[mkt]

Haven't observed any errors

[Susheel Nuguru]

That is strange, is it a custom board? Any chances that you can reproduce this on the DK? so that I will attempt to reproduce it and help you debug it?