Connecting to Xiao nrf52840's SWD interface without soldering?

[msfujino]

@olalonde

I saw that there is an expansion board for the XIAO but it seems it also requires soldering the chip on it.

Using this, soldering should not be necessary.

Expansion Board Base for XIAO | Seeed Studio Wiki

It is quite difficult, but I have also written it in the way shown in the picture in the link below.

How to unbrick a dead XIAO using ST-LINK and OpenOCD

Hi, Using an inexpensive Chinese ST-LINK and OpenOCD for Windows, I was able to repair the XIAO bootloader. Here is a summary of the procedure. I hope it will be helpful. Reference: Wiring and Test | Programming Microcontrollers using OpenOCD on a Raspberry Pi | Adafruit Learning System Download OpenOCD for Windows from https://gnutoolchains.com/arm-eabi/openocd/ and extract it to C:/OpenOCD. Copy the file C:/OpenOCD/share/openocd/script/target/at91samdXX.cfg and rename it XIAO_at91samdX…