Arduino Bluetooth Relay(Single Relay) Control Code

Arduino Bluetooth Relay Control Code

Hc05 Arduino -  Arduino bluetooth module hc05 interfacing to arduino and how to control the arduino bluetooth code  for Bluetooth Relay Control Code is discussing here.

Components Used

» Arduino Uno

» HC 05 Bluetooth Module

» Relay Module ( Single Channel)

» USB To DC Jack Converter

» Power Supply - 5 volt / 2 Ampere

Checkout Prices In India

Buy Arduino Uno

Buy HC05 Bluetooth Module

Buy Relay Module

Buy Jumper Wires

Note : The recommended power supply given to the Arduino DC Jack adapter is 

5 volt DC with an ampere of 2 Amps.

Step 1 - Connect HC 05 Bluetooth Module To Arduino Uno

» Bluetooth 5 V is connected to ICSP pin Vcc.

» Bluetooth gnd is connected to ICSP gnd pin.

» Bluetooth TX pin is connected to Arduino pin 0

This is shown in the above figure.Positive of icsp is on top most right of arduinio board.The ground pin of icsp is bottom rightmost corner of arduino uno board.

Step 2 - Connect Relay To Arduino Uno 

» Relay 5V is connected to Arduino 5 V labelling on Arduino Uno.

» Relay gnd is connected to Arduino gnd.

» Relay input is connected to Arduino pin 3 labelled on arduino uno board.

Step 3 - Light Bulb Wiring Connection To Relay

» The light bulb wiring is shown above

» Here above figure the two stripped wires should be given to the relay.

Step 4 - Connect Load / Light Bulb To Relay

» The above figure shows how the two wire points are connected to relay.

Note : The serial.begin baud rate must be changed if your module is not working

Change values like,

9600

38400

57600

etc.

 The default password is 1234

Procedure

» Turn on Bluetooth in your phone and search for HC05 Bluetooth module.

» Pair Hc05 with your mobile phone, by giving default password 1234.

» After pairing go to Bluetooth app.

» Connect with HC05 Bluetooth module.

» Phone will indicates as “ Connected”.

» Turn on switch in app.Thats it.You are done.

Program

char data;

void setup() 

{
   
Serial.begin(38400);
    pinMode(3,OUTPUT);

digitalWrite(3,HIGH);

}

void loop()

 {
    

if(Serial.available())
       
        {
       
     data = Serial.read();
    Serial.write(data);
   
  }
   
    if(data== 'A')
    {
   {

digitalWrite(3,LOW);

}

    }

  if(data== 'a')
    {
   {

digitalWrite(3,HIGH);

}

}

For Amazing & Simple Electronic Projects