The $5 programmer-debugger

In my review of the Xiao Expansion Board, I praised the availability of the SWD signals but regretted the use of standard 0.1" pins instead of the secure SWD standard connector.

Why not use another Xiao board as a DAPLink programmer-debugger? DAPLink is an open-source initiative by mbed: it provides SWD and JTAG connections and reroutes the serial port.

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