And if I type 123 it says
I received: 1
I received: 2
I received: 3How do I fix this????
Well, what do you WANT it to do? You'll have to do some sort of parsing of the data you read from the serial port, and that can get sort of arbitrarily complex. For a first try you can do something like:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();
if (incomingByte < '0' || incomingByte > '9') {
Serial.println(' ', BYTE); //newline
Serial.print("I received: "); // new "header"
} else {
Serial.print(incomingByte, BYTE);
}
}