//--------BT app control---------//

//Program for four switches but in our case we are using pin 11

​

int switch1=11;

int switch2=12;

int switch3=8;

int switch4=7;

​

int Received=0;

int switch1_state =0;

int switch2_state =0;

int switch3_state = 0;

int switch4_state = 0;

​

​

void setup(){

  Serial.begin(9600);

  pinMode(switch1,OUTPUT);

  pinMode(switch2,OUTPUT);

  pinMode(switch3,OUTPUT);

  pinMode(switch4,OUTPUT);

}

​

void loop(){

 if(Serial.available()>0)

 { 

    Received = Serial.read();

 }

​

////////////////switch1/////////////////////

​

if (switch1_state == 0 && Received == '1')

  {

    digitalWrite(switch1,HIGH);

    switch1_state=1;

    Received=0;  

  }

if (switch1_state ==1 && Received == '1')

  {

    digitalWrite(switch1,LOW);

    switch1_state=0;

    Received=0;

  }

​

////////////////switch2/////////////////////

if (switch2_state == 0 && Received == '2')

  {

    digitalWrite(switch2,HIGH);

    switch2_state=1;

    Received=0;  

  }

if (switch2_state ==1 && Received == '2')

  {

    digitalWrite(switch2,LOW);

    switch2_state=0;

    Received=0;

  }

///////////////////////////////////////////

////////////////switch3/////////////////////

if (switch3_state == 0 && Received == '3')

  {

    digitalWrite(switch3,HIGH);

    switch3_state=1;

    Received=0;  

  }

if (switch3_state ==1 && Received == '3')

  {

    digitalWrite(switch3,LOW);

    switch3_state=0;

    Received=0;

  }

///////////////////////////////////////////

////////////////switch4/////////////////////

if (switch4_state == 0 && Received == '4')

  {

    digitalWrite(switch4,HIGH);

    switch4_state=1;

    Received=0;  

  }

if (switch4_state ==1 && Received == '4')

  {

    digitalWrite(switch4,LOW);

    switch4_state=0;

    Received=0;

  }

}