Serial to old reciever. Problem with the serial comunication

Projects Programming
10

Paul_KD7HB:
Right after you send what you have in your listed code, send:

Serial.print(11,HEX);

That's not correct. That command will display the decimal number 11 as the characters 0B

It should be Serial.write(0x11) for XON and Serial.write(0x13) for XOFF

Using decimal values it would be Serial.write(17) and Serial.write(19)

...R