#include <SoftwareSerial.h>
#include <IRremote.h>
int RECV_PIN = 10;
IRrecv irrecv(RECV_PIN);
decode_results results;
uint32_t delayMS;
#include <SoftwareSerial.h>
SoftwareSerial BT(0, 1); //TX, RX  pins of arduino respetively
String command;
void setup() {
  BT.begin(9600);
  Serial.begin(9600);
  irrecv.enableIRIn();
  pinMode(A0, OUTPUT); //Relay one
  pinMode(A1, OUTPUT); //Relay two
  pinMode(A2, OUTPUT); //Relay three
  pinMode(A3, OUTPUT); //Relay four
  pinMode(2, OUTPUT); //Relay five
  pinMode(3, OUTPUT); //Relay sex
  pinMode(4, OUTPUT); //Relay seven
  pinMode(5, OUTPUT); //Relay eight
  pinMode(9, OUTPUT); //Relay eight
  pinMode(11, OUTPUT); //Relay eight
  digitalWrite(A0, HIGH);
  digitalWrite(A1, HIGH);
  digitalWrite(A2, HIGH);
  digitalWrite(A3, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(11, HIGH);
}

void loop() {
  while (BT.available()) { //Check if there is an available byte to read
    delay(10); //Delay added to make thing stable
    char c = BT.read(); //Conduct a serial read
    command += c; //build the string.
  }
  if (command.length() > 0) {
    Serial.println(command);
    if (command == "A") {
      digitalWrite(A0, HIGH);
    }
    else if (command == "a") {
      digitalWrite(A0, LOW);
    }
    else if (command == "B") {
      digitalWrite (A1, HIGH);
    }
    else if ( command == "b") {
      digitalWrite (A1, LOW);
    }
    else if (command == "C") {
      digitalWrite (A2, HIGH);
    }
    else if (command == "c") {
      digitalWrite (A2, LOW);
    }
    else if (command == "D") {
      digitalWrite (A3, HIGH);
    }
    else if (command == "d") {
      digitalWrite (A3, LOW);
    }
    else if (command == "E") {
      digitalWrite (6, HIGH);
    }
    else if (command == "e") {
      digitalWrite (6, LOW);
    }
    else if (command == "F") {
      digitalWrite (7, HIGH);
    }
    else if (command == "f") {
      digitalWrite (7, LOW);
    }
    else if (command == "G") {
      digitalWrite (8, HIGH);
    }
    else if (command == "g") {
      digitalWrite (8, LOW);
    }
    else if (command == "H") {
      digitalWrite (9, HIGH);
    }
    else if (command == "h") {
      digitalWrite (9, LOW);
    }

    else if (command == "Z") //using this command you can switch on all devices
    {
      digitalWrite (A0, HIGH);
      digitalWrite (A1, HIGH);
      digitalWrite (A2, HIGH);
      digitalWrite (A3, HIGH);
      digitalWrite (6, HIGH);
      digitalWrite (7, HIGH);
      digitalWrite (8, HIGH);
      digitalWrite (9, HIGH);
    }
    else if (command == "z")//using this command you can switch off all devices
    {
      digitalWrite (A0, LOW);
      digitalWrite (A1, LOW);
      digitalWrite (A2, LOW);
      digitalWrite (A3, LOW);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
      digitalWrite (8, LOW);
      digitalWrite (9, LOW);
    }
    command = "";
  }
  if (irrecv.decode(&results)) {
    irrecv.resume();
    if (results.value == 0x406002FD ) {
      digitalWrite(A0, !digitalRead(A0));
      results.value = 0x00000000;
    }
    if (results.value == 0x4060C03F ) {
      digitalWrite(A1, !digitalRead(A1));
      results.value = 0x00000000;
    }
    if (results.value == 0x406040BF ) {
      digitalWrite(A2, !digitalRead(A2));
      results.value = 0x00000000;
    }
    if (results.value == 0x406048B7 ) {
      digitalWrite(A3, !digitalRead(A3));
      results.value = 0x00000000;
    }
    if (results.value == 0x40606897 ) {
      digitalWrite(6, !digitalRead(6));
      results.value = 0x00000000;
    }
    if (results.value == 0x406058A7 ) {
      digitalWrite(7, !digitalRead(7));
      results.value = 0x00000000;
    }
    if (results.value == 0x4060C837 ) {
      digitalWrite(8, !digitalRead(8));
      results.value = 0x00000000;
    }
    if (results.value == 0x4060E817 ) {
      digitalWrite(9, !digitalRead(9));
      results.value = 0x00000000;
    }
    if (results.value == 0x40603AC5 )
    {
      digitalWrite (A0, HIGH);
      digitalWrite (A1, HIGH);
      digitalWrite (A2, HIGH);
      digitalWrite (A3, HIGH);
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, HIGH);
      digitalWrite (5, HIGH);

    }
    if (results.value == 0x40607887 )
    {
      digitalWrite (A0, LOW);
      digitalWrite (A1, LOW);
      digitalWrite (A2, LOW);
      digitalWrite (A3, LOW);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
      digitalWrite (8, LOW);
      digitalWrite (9, LOW);

    }
  }
}
//command="";}} //Reset the variable



//Reset the variable
//you can add other command to control addition devices by adding an elseif
//and the additions commands you add in sketch can be given through voice regonisation as i have created the app buttons only to control three devices

//thankyou-karthik