Smartphone LED Controller Using Bluetooth With Own Application

Hello friends welcome back to "Techno-E-Solution" In this video I'll be going to show you an interesting project "Smartphone controlled LED Using Arduino & Bluetooth with Own developed Application", I developed this application on kodular app making platform. In this project, we control the LED using a smartphone, for the smartphone to Arduino communication I used HC- 05 Bluetooth module. We send commands to the Arduino through the Bluetooth module to control the LED. So let's make this project without wasting any time...

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To make this project we need some components (Best Buy Links are Provided):-

1. Arduino Nano
2. HC-05 Bluetooth Module
3. LED
4. Resistor (470E)
5. Jumper Wires
6. Breadboard

[ Above link are affiliated if you buy from the above link, We got some bonus from it. ]

Follow the Above circuit diagram to make connection :-

Arduino --- Bluetooth Module

5V >> VCC

GND >> GND

TX >> RX

RX >> TX

Arduino --- LED

D3 >> Registor >> Anode

GND >> Cathode

/*
 * Hello friends Here is the Arduio Code for Smartphone LED Controller
 * Upload the following code to your Arduino
 */

String readString;
#define LED 3    

void setup()
{
  Serial.begin(9600);             
  pinMode(LED, OUTPUT);      
 
}
void loop()
{
  while(Serial.available())  
  {
    delay(10);                 
    char c = Serial.read();    
    if (c == '#'){
      break;                   
    }
    readString += c;            
  }
    if (readString.length() >0)
    {
      Serial.println(readString);
                  
      if(readString == "0"){   
        digitalWrite(LED, LOW);
      }
      else if(readString == "1")
      {
        digitalWrite(LED, HIGH);
      }
      }

      readString="";
    }<br>

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I built this application on a kodular app-making platform. In this app, we simply add two buttons to control the LED using Bluetooth. I provide the app link, you just install the following app.

How to operate the application:-

1. First power-up the circuit using a 5V DC supply
2. Turn on mobile Bluetooth.
3. Search for HC-05.
4. Pair them with mobile, use password (1234) or (0000).
5. Now open the application.
6. Click on the Bluetooth button.
7. Select HC-05, the Bluetooth will get connect to the mobile.
8. At the top of the application, you can see the status of the connection, it may be Connected or Not Connected.
9. Now using two buttons on-screen which are the Green & Red buttons to control the LED.

Application Download Link:- Click here

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