arduino serial echo example

//arduino serial echo example

char inByte = 0;         // incoming serial byte

void setup()
{
  // start serial port at 9600 bps:
  Serial.begin(9600);
}

void loop()
{
  // if we get a valid byte:
  if (Serial.available() > 0)
  {
    // get incoming byte:
    inByte = Serial.read();

    // send incoming byte back to serial:
    Serial.print(inByte);
  }
}