Control Devices through Bluetooth Module HC05

Here we take an example of a Led to control it through Bluetooth Module - HC05

Component Required

• Arduino Uno
• Bluetooth Module HC05
• Led
• Jumper Wire
• Smart Phone
• Android App for Bluetooth Serial Communication

Arduino Code

int led = 3; // initialize pin 3 for led

void setup() 

{

  Serial.begin(9600); //baud rate 

  pinMode(led,OUTPUT); //set led pin as output

}

void loop()

{

  while(!Serial.available()); //it check continuously serial until it found 

  byte value = Serial.read(); //when data is found it will stored in variable 'value'

  switch(value)

  {

    case 'O':

      digitalWrite(led,HIGH); //when serial data is 'O' it will turn the On led

      Serial.print("Led is now turned On"); //it will print this message in Serial Monitor

      break;

    case 'F':

      digitalWrite(led,LOW); //when serial data is 'F' it will turn Off the led 

      Serial.print("Led is now turned Off"); //it will print this message in Serial Monitor

      break;      

  }

}

Note: This Arduino Code is also can be used for controlling any electronics and electrical components or appliances through Bluetooth or any Serial Control.

Schematic