Old PCA10056 v2.0.1 unable to connect/flash/erase

RE: Old PCA10056 v2.0.1 unable to connect/flash/erase

KrystofVydra — Tue, 20 Jan 2026 07:32:24 GMT

Hello! the issue in fact was in switch SW6 on pink board and switch SW9 on blue board. It seems that they have bad contacts. I cleaned the boards from dust and also the switches and it works, but I can still spot some "dead spots" in those 2 switches (eg when I move the lever slightly within the position). Thanks!

RE: Old PCA10056 v2.0.1 unable to connect/flash/erase

joh — Tue, 13 Jan 2026 09:26:51 GMT

I'm still not able to reproduce it. I suggest we try to verify that the J-Link software is running properly on both the computer and the on-board debugger. Could you open the "Segger J-Link Configuration" tool (it should be installed with your Segger drivers, under "C:\ProgramData\Microsoft\WIndows\Strart Menu\Programs\Segger - J-Link V8.76 ".

Then update the firmware by checking the checkbox and then click "Update firmware of selected probes and programmers".

If it still doesn't work, double click the probe, and attempt to change the USB Driver (Windows) that it uses.

RE: Old PCA10056 v2.0.1 unable to connect/flash/erase

KrystofVydra — Mon, 12 Jan 2026 10:45:55 GMT

Hello, any updates? Is there perhaps any minimal way to test the Jlink<-> NRF connection? I currently dont have any standalone jlink available, otherwise would try to connect with external jlink to the IC.

RE: Old PCA10056 v2.0.1 unable to connect/flash/erase

joh — Fri, 02 Jan 2026 13:29:49 GMT

Hi Krystof,

It seems like the device is able to connect to the on-board debugger, but it fails when attempting to communicate with the target itself (the nrf52). I don't have the same version of the devkit as you on hand (v2), as I'm having no issues with the current version of the board (v3).

I'll have someone look at it and get back to you.