// Wire Slave Sender // by Nicholas Zambetti // Demonstrates use of the Wire library // Sends data as an I2C/TWI slave device // Refer to the "Wire Master Reader" example for use with this // Created 29 March 2006 // This example code is in the public domain. // #include void setup() { Wire.begin(7); // join i2c bus with address #7 Wire.onRequest(requestEvent); // register event } void loop() { delay(3000); } // function that executes whenever data is requested by master // this function is registered as an event, see setup() void requestEvent() { Wire.write("hello "); // respond with message of 6 bytes // as expected by master }