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Can't Upload to Arduino when Pixy2 Connected

I have a Pixy2 connected to an Arduino (tried Mega and Uno). Whenever the Pixy2 is connected to the Arduino ICSP pins, no programs can be uploaded, unless the Pixy2 if first disconnected. Otherwise the program compiles, starts to upload and eventually times out. What am I missing; there must be a better way to upload programs than to connect and disconnect the Pixy2 each time.


Fund the problem - pilot error. I was using a homemade extension cable and the wiring was incorrect.


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