Bluetooth LED With App | Arduino

In this project, I will show you how to turn On and Off an LED connected to an Arduino board using Bluetooth. I use an HC-05 Bluetooth module to connect the Arduino to the app. The app is made on on "MIT App Inventor." Once the HC-05 has connected to the app, you can then turn on and off the LED via Bluetooth.

This project can still be improved.

Supplies

The components needed to make the project are:

LED Wiring

Connect the LED as the following:

Arduino > LED

GND > GND

D4 > VCC

Bluetooth Wiring

Connect the HC-05 as the following:

Arduino > HC-05

5V > VCC

GND > GND

D2 > TX

D3 > RX

Downloading the App

I have made the app in "MIT App Inventor". You don't have to make the app because I have provided the .apk file for the app. The app is called "Bluetooth_LED.apk." I also have should in more detail how to make the app in the video above.

Programming

Open the program file and then verify the sketch. If the sketch is free of errors you can go on by checking if you have selected the correct board and port. After that, you can upload the sketch to the Arduino.

For more information about this, please visit my Patreon:
https://www.patreon.com/acedinventor

Testing the Project

Open the app you had downloaded in the previous step. Make sure the Arduino board is plugged into a power source. Now click on "Bluetooth." The button will be red when there is no device connected. Now select your Bluetooth module. Once you have connected it to a device, the Bluetooth should turn green on the app and the LED on the HC-05 should start blinking slowly. Now you can click on the light bulb to turn On and Off the LED connected to the Arduino board.

If there is still something you don't understand, you can comment down below.