I've been trying to figure this out for a while, but now my project has come along where it is incredibly inconvenient to test with the cable still inside. I've tried powering with an external supply of 5V to Vin then moving JP2 to EXT, but it doesn't work. I have read that I'm supposed to save to FLASH instead of Memory but I haven't found anything in the datasheet that mentions how to do that. Any help would be greatly appreciated.
