Serial.read()

1int incomingByte = 0; // for incoming serial data
2
3void setup() {
4  Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
5}
6
7void loop() {
8  // send data only when you receive data:
9  if (Serial.available() > 0) {
10    // read the incoming byte:
11    incomingByte = Serial.read();
12
13    // say what you got:
14    Serial.print("I received: ");
15    Serial.println(incomingByte, DEC);
16  }
17}