// Wire Slave Receiver // by Nicholas Zambetti // Demonstrates use of the Wire library // Receives data as an I2C/TWI slave device // Refer to the "Wire Master Writer" example for use with this // Created 29 March 2006 void setup() { Wire.begin(4); // join i2c bus with address #4 Wire.onReceive(receiveEvent); // register event Serial.begin(9600); // start serial for output } void loop() { delay(100); } // function that executes whenever data is received from master // this function is registered as an event, see setup() void receiveEvent(int howMany) { while(1 < Wire.available()) // loop through all but the last { char c = Wire.receive(); // receive byte as a character Serial.print(c); // print the character } int x = Wire.receive(); // receive byte as an integer Serial.println(x); // print the integer }