Control fan and light using mobile bluetooth

Control Fan And Light Using Mobile Bluetooth

char data=0;

void setup() {                

  pinMode(7, OUTPUT);

  pinMode(8, OUTPUT);  

pinMode(10, OUTPUT);  

pinMode(12, OUTPUT);  

  

   Serial.begin(9600);

 digitalWrite(7,HIGH);

 digitalWrite(8,HIGH);

  digitalWrite(10,HIGH);

   digitalWrite(12,HIGH);

 }

void loop() {

if(Serial.available())

{

  data=Serial.read();

  if(data=='a')

 digitalWrite(7,LOW);

 else if(data=='b')

  digitalWrite(7,HIGH);

  if(data=='c')

 digitalWrite(8,LOW);

 else if(data=='d')

  digitalWrite(8,HIGH);

  

  if(data=='e')

 digitalWrite(10,LOW);

 else if(data=='f')

  digitalWrite(10,HIGH);

  if(data=='g')

 digitalWrite(12,LOW);

 else if(data=='h')

  digitalWrite(12,HIGH);

 

}

}