| Index

| Reference for Wiring 1.0 (ALPHA) 0017+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name |  | ### onReceive()
Examples |  |
    #include <TwoWire.h>

    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
    }
Description |  | The onReceive() method set the function that executes whenever data is received as a slave device. Every time a master writes to this device the specified function is executed.
Syntax |  |
    Wire.onReceive(function)
Parameters |  |
function |  | The name of the function to be called whenever data is received in slave mode
Wire |  | The hardware TWI port
Returns |  | None
Usage |  | Application