Have Arduino, just got USB Host Shield, plugged them together to start playing only to find that Arduino no longer is in communication with the IDE programmer and I can see that the existing program on the UNO R3 device is still running.
Even unplugging the USB Host Shield, no difference with comms which report as an error in the IDE programmer. I am also getting reports of errors in the sketches not being supported or only supported in a particular Arduino board when the program is only what has already been used on the board, eg the USB keyboard demo, it was the first one that I tried and led me to buying the USB Host shield as they gave me the idea for a project I would like to try.
Any suggestions on what might be wrong here? Initially two COM ports 3 & 5 were on offer, one channel didn't hear any device attached, so I changed COM ports and it worked, now it only lists one com port.
I am confused here!