Power optimization question: LBS example on nRF52DK_52832

[witc]

Hi, 

I started the LBS example on the nRF52DK_52832 kit and connected the PPK2 kit to the P22 pins for measuring power consumption. I am not sure if I did something wrong or if the kit is damaged, but the consumption is quite high. I replaced all prints with LOG_ via RTT and for measuring power consumption I set CONFIG_LOG=n in prj.conf.

After flashing, the PPK2 shows consumption as in the picture - AVG = 1.4 mA. Is that too much? How can I reduce it?

I wanted to set up advertising with a 1-second interval, thinking that the advertising would last a few milliseconds and that the MCU would spend the rest of the time (about 995 ms) in deep sleep where it would consume almost no power.

[Edvin]

Hello,

Are you by chance running a debug session? If you are not sure, try to power cycle the DK before doing your measurements.

If that doesn't cause the current consumption to go down, then there is something else running in the background. Did you specifically disable logging over uart? Or disable logging alltogether?

Try adding these to your prj.conf:

CONFIG_SERIAL=n
CONFIG_LOG=n

And see if it makes any difference (remember to power cycle the DK after you program it).

Best regards,

Edvin