NRF52840DK + PPK2

[JulianKaroliny]

Dear Dev-Zone Team,

I just got my PPK2 and wanted to test it on the nrf52840

It seams to work fine, I can see the advertisement peaks, however the average power consumption was too high. I tried different configurations but ther was always a noisy average power consumption of 0.6mA to 1.4mA (depending on the configuration I tried)

After some bugfixing i found this post and tried the configuration there https://devzone.nordicsemi.com/f/nordic-q-a/82804/nrf52840-ppk2---source-meter-vs-ampere-meter/344105#344105

That is:
Source meter mode:

1. Power the nRF52 directly from P21 by using the SW10 (VEXT -> nRF)
2. If SB40 is previously cut, put a jumper on P22.
3. The USB should be left connected in order to power the rest of the DK (otherwise you will get leakage through the SWD interface)
4. The nRF ONLY switch (SW6) should be set to nRF ONLY to avoid leakage currents

As software example I used the Peripheral_hr example of the nrf connect sdk 1.7.1

in the prj.conf I set  CONFIG_BT_DEBUG_LOG=n, though I think that did not change anything

Here is a picture of the PPK2 result 

I also tried the amperemeter solution but i got a similar result

I hope I provided all needed informations

br

Julian

[JulianKaroliny]

small update, flashed the program for testing on a NRF52840 dongle (PCA10059) and connected the the PPK2 with source mode directly to the Vbus and ground pin.

Here the results seem to be more reasonable (see picture), at least i don't have this strange noise and way less average current

Maybe I am using the DK wrong :-/