Power Profiler doesn't measure anything.

RE: Power Profiler doesn't measure anything.

Jørgen Holmefjord — Fri, 03 Jul 2020 14:22:45 GMT

[quote user="christos profentzas"]After cutting the SB40 works for me.[/quote]

That is a good point. When I tried this before, the PPK showed a high current, but it may have changed for more recent software versions.

[quote user="christos profentzas"]However, in order to reprogram the board, I need to put a jumper on P22. Then, if I want to use the power profiler again I need to remove the jumper.

It end-ups to these steps: 1) remove power profiler, 2) put the jumper 3) flash new program 4) remove jumper 5) put the power profiler back![/quote]

This is correct, you need to close it with a jumper if the PPK is removed from the DK. It is also possible to program the DK by switching the COM switch over to EXT and then back to DK after programming. Another option is to use a second DK with a 10 pin cable between Debug out of the external DK and the Debug in on the PPK. In this configuration, the COM switch needs to be in EXT position all the time.

RE: Power Profiler doesn't measure anything.

christos profentzas — Fri, 03 Jul 2020 14:14:46 GMT

Hi,

I have the same setup and the same issue, after reading the documentation I realize that I have not cut the bridge SB40,
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf52840_dk%2FUG%2Fnrf52840_DK%2Fprepare_board.html

After cutting the SB40 works for me.

However, in order to reprogram the board, I need to put a jumper on P22. Then, if I want to use the power profiler again I need to remove the jumper.

It end-ups to these steps: 1) remove power profiler, 2) put the jumper 3) flash new program 4) remove jumper 5) put the power profiler back!

I hope there is a better way to do it...

RE: Power Profiler doesn't measure anything.

Jørgen Holmefjord — Wed, 01 Jul 2020 14:34:19 GMT

Can you try to erase the firmware on the PPK, using "nrfjprog --eraseall" command? Then open nRF Connect Power Profiler app and check that it asks to flash the firmware again.

RE: Power Profiler doesn't measure anything.

soointerested — Wed, 01 Jul 2020 13:15:33 GMT

Thank you for the reply! Yes, DUT select and COM switches are both in DK position.

No, the power profiler app did not ask me to flash the PPK.

RE: Power Profiler doesn't measure anything.

Jørgen Holmefjord — Thu, 25 Jun 2020 11:28:12 GMT

Hi,

The PPK is mounted on top of the DK?

Is the "DUT select" switch in the DK position? Is the COM switch in DK position (if you have not removed the tape, it should be). Did nRF Connect Power Profiler app ask you to flash the PPK when you connected to the COM port of the DK?

Best regards,
Jørgen