Led On/Off using HC-05 Bluetooth Module & Arduino Uno

 

                  Led On/Off using HC-05 Bluetooth Module

                  & Arduino Uno

                 By Engr.Habib Ur Rehman

Components/Equipment Required:

            Following Components/Equipment are required to perform task.

1.    Arduino Uno (https://piees.pk/product/arduino-uno-r3/)

2.    HC-05 Bluetooth Module (https://piees.pk/product/hc-05-bluetooth-module/)

3.    Smart Phone

4.    LED Light (https://piees.pk/product-category/lcds-display/leds/)

5.    Breadboard

6.    Jumper Wires (https://piees.pk/product-category/jumper-wires/)

Circuit Diagram:

Arduino Program:

int ledPin=13;

int state=0;

int flag=0;

void setup()

{

 pinMode(ledPin,OUTPUT);

 digitalWrite(ledPin,LOW);

 Serial.begin(9600);

 }

 void loop()

 {

  if(Serial.available()>0)

  {

   state= Serial.read();

   flag=0;

   }

   if (state == '0')

   {

    digitalWrite(ledPin,LOW);

    if(flag==0)

    {

      Serial.println("LED: off ");

      flag=1;

      }

    }

    else if (state == '1')

   {

    digitalWrite(ledPin,HIGH);

    if(flag==0)

    {

      Serial.println("LED: on ");

      flag=1;

      }

    }

  }

Android Application:

            Android application is named as “Bluetooth Terminal HC-05”

            Pairing code is “1234”