Arduino_Bluetooth

It helps the user to control lights and the fans connected to the arduino using bluetooth

This is basically the code for the arduino bluetooth app

//declaring our constants #define ledOne_Two 2 #define ledThree_Four 3 #define ledFive_Six 4 #define ledSeven_Eight 5 #define ledNine_Ten 6 #define ledEleven_Twelve 7

#define fanPin 9 #define led_brightness_pin 10

char command;
String string;

void setup() { Serial.begin(9600); //Setting up the baud rate to the default value which is 9600

//Declaring the modes as output pinMode(ledOne_Two, OUTPUT);
pinMode(ledThree_Four, OUTPUT); pinMode(ledFive_Six, OUTPUT); pinMode(ledSeven_Eight, OUTPUT); pinMode(ledNine_Ten, OUTPUT); pinMode(ledEleven_Twelve, OUTPUT);

pinMode(led_brightness_pin, OUTPUT); pinMode(fanPin,OUTPUT); }

void loop() {

if (Serial.available() > 0) //Checking if serial reads any data {string = "";} //initialize the string value if any data is read

while(Serial.available() > 0) //looping through whenever an information is sent { command = (byte)Serial.read(); //read any data sent through the bluetooth socket //and change it to computer language which is the bytes

if(command == ':') { //Checking if the data sent is not null break; } else { string += command; //if there is something sent, store it in an initialized string variable } delay(1); //delays for very small time to account for any threads }

  //Setting the on buttons and giving it a higher voltage
  if(string == "S1ON")
  { ledOn(ledOne_Two); }
   if(string == "S2ON")
  { ledOn(ledThree_Four);}
   if(string == "S3ON")
  { ledOn(ledFive_Six);}
   if(string == "S4ON")
  { ledOn(ledSeven_Eight);}
   if(string == "S5ON")
  { ledOn(ledNine_Ten);}
   if(string == "S6ON")
  { ledOn(ledEleven_Twelve);
  } 

  //Setting the off buttons and giving it a lower voltage
   if(string == "S1OFF")
  { ledOff(ledOne_Two); }//Calling functions that will control the state of the voltages 
   if(string == "S2OFF")
  { ledOff(ledThree_Four);}
   if(string == "S3OFF")
  { ledOff(ledFive_Six);}
   if(string == "S4OFF")
  { ledOff(ledSeven_Eight);}
   if(string == "S5OFF")
  { ledOff(ledNine_Ten);}
   if(string == "S6OFF")
  { ledOff(ledEleven_Twelve);
  }

  //Setting the analog voltage for the one led pin
  
  if(string.toInt()>=0 && string.toInt()<=255){ //checking if the integer is in the analog range
    if (string.toInt()==0){
      digitalWrite(led_brightness_pin , LOW);
      }
    else{
    analogWrite(led_brightness_pin,string.toInt());
        }
    delay(1);
    }
//Setting the analog voltage for the fan
	if(string.toInt()>=300 && string.toInt()<=555){ //checking if the integer is in the analog range
      analogWrite(fanPin , string.toInt()-300);
  }  
    delay(1);

} //Funtions that will control the state of the Voltages void ledOn(int x) { digitalWrite(x, HIGH); //high voltage delay(10); //delay for some time }

void ledOff(int y) { 
digitalWrite(y, LOW); //low voltage
delay(10);			//delay for sometime
}