Controlling Arduino UNO Via Smart Phone Using HC-05 Bluetooth Module

Controlling Arduino UNO via Smart Phone using HC-05 Bluetooth Module.

Step 1: Initial Setup

Components Needed:

• Arduino UNO
• Arduino Cable ( In order to connect your arduino to computer)
• HC-05 Bluetooth Module
• LED
• 1 Resistor 450 Ω to 1KΩ (any)
• Bread Board
• Arduino Desktop App ( In order to compile your code to arduino board )
• Yes Of course some couple of wires.

Source Code:

char data = 0;                      //Variable for storing received data
void setup()
{
    Serial.begin(9600);          //Sets the baud for serial data transmission                               
    pinMode(13, OUTPUT);  //Sets digital pin 13 as output pin
}
void loop()
{
   if(Serial.available() > 0)      // Send data only when you receive data:
   {
      data = Serial.read();        //Read the incoming data & store into data
      Serial.print(data);            //Print Value inside data in Serial monitor
      Serial.print("\n");        
      if(data == '1')                    // Checks whether value of data is equal to 1
         digitalWrite(13, HIGH);  //If value is 1 then LED turns ON
      else if(data == '0')             //  Checks whether value of data is equal to 0
         digitalWrite(13, LOW);   //If value is 0 then LED turns OFF
   }
}

Step 2: Final Output