One of my students used a USB on the go cable
to hook an arduino up to his android cell phone to read serial output running the following Android to Serial App
Anyone have any ideas if this will work on the photon? I don’t see any reason why it wouldn’t. Just need to think of some simple .ino program to test it out. As far as powering the photon I think it is a bit dangerous as the mA that are used on your photon would have to be below about 500mA, but for just getting a serial printout, this would be very useful.