Introduction: Arduino Bluetooth Remote Lcd Display

Picture of Arduino Bluetooth Remote Lcd Display


Today i made a simple but useful remote LCD.

What this does? You can connect your phone to the Bluetooth module of your Arduino, enter a text message and it will appear on the Arduino's LCD!

Step 1: The Stuff That You Need.

Picture of The Stuff That You Need.

The stuff you will need:

-A breadbord.

-A Arduino HC-05 bluetooth module.

-A LCD display and potmeter

-A Arduino UNO or MEGA.

-Some wires.

-A mobile phone Android, Windows or Apple.

That's all!

Step 2: Stick the Parts in the Breadboard.

Picture of Stick the Parts in the Breadboard.

Not much to it... Just put the parts in the breadboard.

Step 3: Connect the Bluetooth Module.

Picture of Connect the Bluetooth Module.

Now you will need to connect the Bluetooth module to the Arduino.

Module: Arduino

TX ====>pin1

RX ====>pin2

VCC ====>+5v


Step 4: Connect the LCD

Picture of Connect the LCD

Now you'll need to connect the LCD screen to the Arduino.

See the above image for a schematic view.

Turn on your Arduno and test if the LCD is working properly. You will see some black filled pixels on the screen.

Step 5: Upload the Code!

Now you will need to upload the code to the Arduino.

Start up your Arduino Software and select the correct COM port and board.

Open the file added (Bluetooth Commander.ino) and press "upload"!

Step 6: Set Up Your Phone.

Picture of Set Up Your Phone.

First you will need to pair to the Bluetooth network called HC-05 you can do this with password 1234.

Download from the phone store some app where you can send serial commands to the module.

I used Bluetooth Terminal for Android. When you have done that open the app click on connect to a device and tap on HC-05 it should connect now.

Step 7: Test It!

Picture of Test It!

Now test it!

Just type some text into the commander and then the text will appear on the Arduino!

When you have a problem uploading the Arduino sketch try unpluggin the Bluetooth module's TX and RX pins, upload then.


JayveeO1 (author)2017-03-12

pcb circuits pls

ReymondA2 (author)2016-12-07

sir can i change the LCD device to a big One?

MohanG14 (author)2016-10-17

Bro can you make same project using 8051(AT89S52) instead of arduino.................

Or just send the coding for 8051 please.......

RavenG3 (author)2016-07-26

Hello there, first of all I would like to say that your project is simply fantastic. I was inspired by this project and will be using it for my finals. I just have one question though, is it possible to do this project with a wifi module instead of bluetooth and could I add on a buzzer to notify when the message is being diplayed on the screen? Thank you.........:)

SurajN14 (author)2016-06-28

i need codes please help me.

UsamaA32 (author)2016-05-02

Doesnt The bluetooth module operate on 3.3V ???

smartv2 (author)2016-04-22

How do i scroll the text on the lcd??? Please help

VenkadeshN (author)2016-03-27

How to get any text displayed on lcd to show on the android phone ? (other way around)

tushar thote (author)2016-02-06

I made it thanx

Hugu (author)2015-09-06

It is your the BT terminal app?
it possible to send images too? (wanna do something like yours, but with a rpi with an tft..)

SacHinN1 (author)2015-06-17

My bluetooth modile is getting connected but i am not getting any text on the lcd, what mistake would i have done?

ParamP1 (author)2015-04-21

For the same, what should I do, I want to scroll the text on screen...??
I found function,


But admin if possible please attach the exact code with scrolling, I am having an error while scrolling.

Thanks in advance!

michelino666 (author)2015-01-25

sorry I'm very newbie and probably I'm saying it wrong but if I understand it well :both the LCD and the Bluetooth module connects to pin n1 it's correct?

I meant pin n2 according the schemes you have pubblished

Hello, sorry but i dont understand what you mean. Can you might formulate your question some better?

Troels (author)2014-11-06

Just made this and it's Amazing:D

FlyBooster (author)2014-10-18

Thanks for this usefull tuts! Bravo ;-)
Could you upload please, a "Fritz" screenshot of wiring be cause i'm newbies and i've some trouble with my LCD wiring!

Thanks for the comment. Can i might help you out with this? And for the bluetooth module wireing is very simple. Connect the flollowing wires:

Module Arduino UNO

TX ====>pin1

RX ====>pin2

VCC ====>+5v


FlyBooster (author)2014-10-18

A Link to Fritzing software (free soft) -

StreetKnightGear (author)2014-08-01

So does the Bluetooth LCD also show the incoming messages? Or just the outgoing?

leloup146 (author)2014-06-06

You can remove the string declaration on line 3, it is not used.

wouterdoornbos (author)leloup1462014-06-06

Yes, i see :) Forgot that one to delete. Thanks for telling!

craftclarity (author)2014-06-05

It's always nice to see projects like this working, isn't it?

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