433m_receiver

/*
  RF Blink - Receiver sketch
     Written by ScottC 17 Jun 2014
     Arduino IDE version 1.0.5
     Website: http://arduinobasics.blogspot.com
     Receiver: XY-MK-5V
     Description: A simple sketch used to test RF transmission/receiver.
 ------------------------------------------------------------- */

 #define rfReceivePin A0  //RF Receiver pin = Analog pin 0
 #define ledPin 13        //Onboard LED = digital pin 13

 unsigned int data = 0;   // variable used to store received data
 const unsigned int upperThreshold = 500;  //upper threshold value
 const unsigned int lowerThreshold = 100;  //lower threshold value

 void setup(){
   pinMode(9, OUTPUT);
   Serial.begin(9600);
 }

 void loop(){
   data=analogRead(rfReceivePin);    //listen for data on Analog pin 0

    if(data>upperThreshold){
     digitalWrite(9, HIGH);   //If a LOW signal is received, turn LED OFF
     Serial.println(data);
   }

   if(data<lowerThreshold){
     digitalWrite(9, LOW);   //If a HIGH signal is received, turn LED ON
     Serial.println(data);
   }
  // delay(1000);
 }