wireless_home_automation_arduino_tx.c

/*
  created by prasant
  www.electronify.org 
  you can do what ever you want with this piece of code 
*/

const int buttonPin1 = 14;     // the number of the pushbutton pin
const int buttonPin2 = 15;
const int buttonPin3 = 16;
int buttonState1 = 0;         // variable for reading the pushbutton status
int buttonState2 = 0;
int buttonState3 = 0;
void setup(){
    pinMode(buttonPin1, INPUT); 
  pinMode(buttonPin2, INPUT); 
  pinMode(buttonPin3, INPUT);
  Serial.begin(9600);
}
void loop()
{
    // read the state of the pushbutton value:
  buttonState1 = digitalRead(buttonPin1);
  buttonState2=digitalRead(buttonPin2);
  buttonState3=digitalRead(buttonPin3);
  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState1 == HIGH) { 
     Serial.write(1);   
  } 
  else if (buttonState2 == HIGH) {
      Serial.write(2);
  }
  else if (buttonState3 == HIGH) {
      Serial.write(3);
  }
  else{
    Serial.write(4);
  }
}