LCD Display Via Bluetooth





Introduction: LCD Display Via Bluetooth

About: I am an electronic hobbyist on Arduino, Photon, Raspberry Pi and common electronics.A passionate cook.Any assistance in electronics and web development feel free to contact me at

Hi, guys!! I'm Sridhar Janardhan back with another ibles.Today I am going to teach you how to send data from mobile to Arduino and display using it an LCD.This is achieved by using HC-05 Bluetooth module.

Step 1: Components Required:

The components required for this ibles are:

  • Arduino Uno
  • Breadboard
  • LCD
  • Bluetooth module
  • Jumper Wires

Let's start to connect the Bluetooth module

Step 2: Bluetooth Module Connection:

The Bluetooth module is used for transmitting data wirelessly from the transmitter to receiver.The hc-05 module works on the same principle but on the different operation.let me explain the basic pins of the Bluetooth module

The HC-05 Bluetooth module has four pins:

  • TX pin - Transmitting pin which is used to transmit the data
  • RX pin - the pin that receives data from the receiver.
  • VCC pin -power supply pin
  • GND pin - power supply pin

The connection of the module is as follows:

  • TX pin to the RX pin of Arduino
  • RX pin to the TX pin of Arduino
  • VCC pin to the Positive railings of the breadboard
  • GND pin to the negative railings of the breadboard

Step 3: LCD Interface:

Interfacing an LCD to an Arduino is hectic as it has much connection and also spoils the beauty of the circuit by its ugly wire.To avoid these stuff I2C is used.

The connection of the LCD is as follows:

  • VCC- to the positive railing of the breadboard.
  • GND- to the negative railing of the breadboard.
  • SDA- To Arduino analog pin A4.
  • SDL- To Arduino analog pin A5.

Now let's start coding.

Step 4: Coding

#include <LiquidCrystal_I2C>

LiquidCrystal_I2C lcd(0x3f, 16, 2);

void setup() {




void loop() {





Step 5: Output:



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    7 Discussions


    Question 2 hours ago

    Do you think this would work with a NRF24L01 instead of the WIFI?

    Iam trying to add bluetooth to my ipod 5th gen 30gb .i have the i flash quad,+1900mAh.
    Could this be done using arduino parts??

    1 more answer

    it is sometime difficult to connect with bluetooth in ipad. keep trying for the connetion or change the bluetooth app. after this it will not work please let me now.

    Can you provide the exact library files, That you used.

    Nice work! But what did you use for your power supply?