arduino uno

// Remote Control

//Use of 4 pins, 2 for channel changes, 2 volume changes
int ChannelPlusPin = 5;
int ChannelLessPin = 6;
int VolumePlusPin = 7;
int VolumeLessPin = 8;


int pulse = 25000;   // milliseconds to hold button on


void setup()
{
  //set up pins as outputs


  pinMode(ChannelPlusPin, OUTPUT);
  pinMode(ChannelLessPin, OUTPUT);
  pinMode(VolumePlusPin, OUTPUT);
  pinMode(VolumeLessPin, OUTPUT);

  Serial.begin(9600);// Start serial communication at 9600 bps

}

// function for updating any pin
   void updatePin (int pin, int pulse){
  Serial.print("RECEIVED PIN");
  Serial.println(pin);
  digitalWrite(pin, LOW);
  delayMicroseconds(pulse);
  digitalWrite(pin, HIGH);
  Serial.println("ON");
  Serial.println("OFF");
}
void loop()
{
 /* while(1){
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  }*/
  if (Serial.available()) { // If data is available to read,
    char val=Serial.read();
     if(val == '1') {
      // Channel plus button pulsed

      digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  delay(250);
  updatePin(ChannelPlusPin, pulse);
    } else if(val == '2') {
      // Channel less button pulsed

     digitalWrite(5, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  delay(250);
  updatePin(ChannelLessPin, pulse);
    } else if(val == '3') {
      // Volume plus button pulsed

   digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  delay(1000);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  delay(250);
  updatePin(VolumePlusPin, pulse);

  } else if(val == '4') {
      // Volume less button pulsed

   digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  delay(1000);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  delay(250);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  delay(250);
  updatePin(VolumeLessPin, pulse);
  }
   }}