Wire (I2C)


Reads a byte that was transmitted from a slave device to a master after a call to requestFrom() or was transmitted from a master to a slave. read() inherits from the Stream utility class.

Wire.read() ;

Returns: The next byte received


// Master Reader running on Device No.1 (Use with corresponding Slave Writer running on Device No.2)

void setup() {
  Wire.begin();              // join i2c bus as master
  Serial.begin(9600);        // start serial for output

void loop() {
  Wire.requestFrom(2, 6);    // request 6 bytes from slave device #2

  while(Wire.available()){   // slave may send less than requested
    char c = Wire.read();    // receive a byte as character
    Serial.print(c);         // print the character