Having some spare boards around comes in very handy when you require an method of debugging some items.

After 2 hours designing the 4 hours printing on the photon I now have a module debugger.

Just waiting for the boards to arrive to finish it off. Exciting times. I do love seeing the pogo pins in use. The pins are used to connect to the SWCLK ,SWDIO, RESET and GND target pads on the core module PCB's