PPK2 is not giving correct current measurements after the Update

RE: PPK2 is not giving correct current measurements after the Update

Menon — Wed, 13 Aug 2025 08:31:26 GMT

Hello,

While reviewing some related code, we noticed a potential difference between the new and old PPK firmware, specifically around the voltage offset. Could you give the following firmware a try?
devzone.nordicsemi.com/.../pca63100_5F00_ppk2_5F00_0.0.0_5F00_bebcab8.hex

You can program the HEX file using the Programmer app. The Power Profiler app will say the firmware isn’t compatible, but just click "No" when it asks to update. You can always switch back to the official release later by clicking "Yes" in that prompt.

It would be great if you could check two things:

See if this improves the SMU voltage accuracy.
Report the ldo_offset value by running the metadata read --all shell command.

The PPK2 has a secondary COM port with shell access. You can use, for example, the Serial Terminal app to connect.

Kind Regards,

Abhijith

RE: PPK2 is not giving correct current measurements after the Update

Menon — Tue, 12 Aug 2025 07:13:00 GMT

Hello,

Sorry for the delayed response. I am checking internally to see if this issue might be related to the recent firmware update. I have received another report about a similar problem, so I suspect there may be something wrong with the recent firmware update. I will update you here once I have clarified a few things internally.

Kind regards,
Abhijith

RE: PPK2 is not giving correct current measurements after the Update

Surya — Thu, 07 Aug 2025 08:03:55 GMT

Hi,

I have provided a simple description of my setup, as I tested it until the afternoon of that day.
I have used Source meter mode (Not ammeter mode).

I have checked the Voltage across Vout and Gnd

RE: PPK2 is not giving correct current measurements after the Update

Menon — Wed, 06 Aug 2025 18:47:43 GMT

Hello,

[quote user="Surya"]I am connecting the Vout of the ppk2 kit to the +ve of my target. and Gnd to -ve of my targe[/quote]

Are you using the Ampere meter mode? What you’ve mentioned here is correct, but if it is Ampere meter mode, then connect the VIN of the PPK2 to the positive terminal of your external power supply, and ensure that all grounds (PPK2, target, and power supply) are connected together. Please refer to the documentation.

If I’m misunderstanding your setup, kindly provide a picture of it.
To rule out any system-related issues, you can also try it on a different PC and see if the issue persists.

Kind Regards,

Abhijith

RE: PPK2 is not giving correct current measurements after the Update

Surya — Mon, 04 Aug 2025 14:11:53 GMT

Hi Abhijith,

I am connecting our custom board (NRF52xx with multiple sensors). I will draw 7uA current during sleep. But now it is showing 0 nA. So I have checked the input voltage for the target(from the ppk2 kit), and it is not correct.

I am connecting the Vout of the ppk2 kit to the +ve of my target. and Gnd to -ve of my target.

RE: PPK2 is not giving correct current measurements after the Update

Menon — Mon, 04 Aug 2025 12:52:01 GMT

Hello,

Could you please provide more details about your setup?
Is this a custom board, and how are you connecting the PPK2 to measure the current?

Kind regards,
Abhijith