Arduino - Read

Arduino

Serial

read()

Description

Reads incoming serial data. read() inherits from the Stream utility class.

Syntax

Serial.read()

Arduino Mega only:
Serial1.read()
Serial2.read()
Serial3.read()

Parameters

None

Returns

the first byte of incoming serial data available (or -1 if no data is available) - int

Example

int incomingByte = 0; // for incoming serial data

void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}

void loop() {

// send data only when you receive data:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();

// say what you got:
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
}
}

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