Send an "A" (ascii 65) out the serial port
Send a "B" (ascii 66) out the serial port
Send Hello World! out the serial port
Send a 0 (ascii 0) out the serial port
send the value 1 and the value 255 (FF in hexadecimal)
Send "0" (ascii 48) out the serial port
Send "1" (ascii 49) out the serial port
Send "2" (ascii 50) out the serial port
Send "3" (ascii 51) out the serial port
Send "4" (ascii 52) out the serial port
Send "5" (ascii 53) out the serial port
Send "6" (ascii 54) out the serial port
Send "7" (ascii 55) out the serial port
Send "8" (ascii 56) out the serial port
Send "9" (ascii 57) out the serial port
udprcvr = 1