PPK2 stops working and get strange values on nRF Connect

[Samuele Forconi]

Hi,

suddenly our PPK2 stops working and we started to have strange values on nRF Connect  interface (current values in YA...).

This screenshot has been taken with a connected nRF52 board (that should consume a few uAmps).

I'm using nRF Connect v4.0 on Ubuntu Linux 22.04. 

I've already performed a firmware update by holding TP34+GND to enter in bootloader mode, but nothing has changed.

Is there anything that I could do to revive this PPK2?

[Priyanka]

Hi Samuele,

Do you have any other hardware connected to the DK, for eg any peripherals, etc?

Have you tried changing the cables?

When you power on the PPK2, does it light up?

Best Regards,

Priyanka

[Samuele Forconi]

No, we don't have any other hardware connected other than our nrf52832 board.

We have another PPK2 board and the other one with the same setup is measuring the correct current values.

I'm afraid something has messed up on the hardware...

[Priyanka]

After setting the PPK2 in bootloader mode, did you reprogram it when prompted?

-Priyanka

[Samuele Forconi]

Yes, after setting in bootloader mode, I have reprogrammed the PPK2 when nRFConnect asked me to reproram the board.

The reprogramming logs didn't show any errors and after that I was able to reconnect to the PPK2 in the Power Profiler app (but I get the wrong measures).

[Priyanka]

That looks strange. But in the screenshot that you attached, the device is still "Unknown". Is this screenshot after you re-programmed it?

Could you attach the ppk log?

-Priyanka

[Samuele Forconi]

I try to attach some info from the system:

$ dmesg
[375617.679764] usb 1-4: new full-speed USB device number 59 using xhci_hcd
[375617.830317] usb 1-4: New USB device found, idVendor=1915, idProduct=c00a, bcdDevice= 1.00
[375617.830328] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[375617.830333] usb 1-4: Product: PPK2
[375617.830336] usb 1-4: Manufacturer: Nordic Semiconductor
[375617.830340] usb 1-4: SerialNumber: C2F61ED61B5A
[375617.833417] cdc_acm 1-4:1.1: ttyACM0: USB ACM device

nRFConnect / Power Profiler

Logs of Power Profiler:

17:24:57.913	Using nrf-device-lib-js version: 0.5.0
17:24:57.913	Using nrf-device-lib version: 0.13.11
17:24:57.913	Using nrfjprog DLL version: 10.18.2
17:24:57.913	Using JLink version: JLink_V7.80c
17:24:58.015	Installed JLink version does not match the provided version (V7.66a)
17:25:22.937	Validating firmware for device with s/n C2F61ED61B5A
17:25:22.945	Opening device with s/n C2F61ED61B5A
17:25:23.233	Trigger length updated to 10 ms
17:25:23.380	PPK started
17:25:23.408	PPK opened
17:26:27.791	DUT ON
17:26:28.925	Sampling started
17:26:43.469	Sampling stopped
17:26:45.389	DUT OFF

Thanks for your support.

BR,

Samuele.

[Priyanka]

Hi Samuele,

I understand that you have tried all this once, but just to make sure, Could you try the following?

"Disconnect all other nordic devices from the computer, turn off the kit and remove it from the plastic by removing the four screws. Insert USB to J2 (USB DATA/POWER). Short a connection between GND (e.g on the four pin power output header) to TP34 on the PPK2. While holding the jumper cable, turn the kit on and remove the jumper. Now the PPK2 should be in bootloader again.

Open the PPK app, and select the device which is now just a serial number.

When selecting it, the user will be prompted to program the application and it should now be working again."

 

But before you do this, please turn on Verbose Logging in the Power Profiler app, then upload the log file here, if it doesn't work.

-Priyanka