Reference for Wiring version 0024+. 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.

Class

Wire

Name

available()

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 Returns the number of bytes available.
Syntax
Wire.available()
Parameters
Wire The TWI port.
Returns int
Usage Application
Updated on November 01, 2009 09:20:36am PST

Creative Commons License