PaulMurrayCbr:
- perhaps the baud rate on your serial monitor is wrong
- perhaps the app sending character data to your UNO is not sending ASCII, but UTF-16
The app that I use is Bluetooth spp pro, and it does not have th ecapabilities to send caracters in UTF-16; only ASCII or Hex(00-FF).
The Serial monitor is not wrong, merely that it is printing out exactly what the bluetooth chip recieves, and the recieved data is being misinterpreted.
I have Troubleshooted for a continuous period of over 8 hours, and the only possible conclusion is that the bluetooth chip is faulty; seeing as I uploaded multiple sketches to the board, and none of them resulted in the bluetooth working.