Control LEDs with your Android | Arduino-Bluetooth module tutorial

You already know what we are gonna do today…so lets get started !

Things you’ll need :-

  • Arduino board
  • Breadboard
  • Bluetooth module/sensor – HC05
  • Couple of jumpers/single stranded wires
  • LEDs
  • An ANDROID(obviously 😛 )

Video tutorial down below !

Connections Of Bluetooth module HC05 :-

VCC – to VCC of Arduino.
GND – to GND of Arduino.
RX – to digital pin 0(TX pin) of Arduino.
TX – to digital pin 1(RX pin) of Arduino. (connect RX & TX pin after uploading the code)

Of LED –
Positive terminal – to pin 8 of Arduino.
Negative terminal – GND of Arduino.

bluetooth module tutorial, connections, coding, arduino

Connections of bluetooth module HC05 with Arduino

Procedure :-

  1. Make the connections as shown in the above image. Don’t connect the RX & TX pins WHILE/BEFORE  uploading the code !
  2. Copy the code given below.
  3. Download the app called BlueControl (It’s free). Here is the link
  4. Open the app Blue control (It will automatically turn on the device’s Bluetooth). Go to options. Click on “Connect to Robot”. Choose the device – HC 05.
  5. When you are connecting to the Bluetooth module for the first time, it will ask you the password. Enter 0000 OR 1234.
  6.  When the device gets successfully paired with the sensor, the LED lights on sensor will start blinking at a slower rate than usual.
  7. DONE. Copy the code given below & test it out !

Code :-


Here’s a video tutorial which will surely make your job easy… 🙂

Comment below if you face any difficulties. I’ll solve them for you ASAP

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