Arduino Wireless Display

Hi Everyone, Today we will see how to build Arduino Wireless Display. In this project we are going to display the text in the Arduino LCD screen which is entered in the smartphone. So we can change the text displaying in the Arduino LCD whenever we wanted. This project required minimal components and was super easy to make. Let's get started.

1. Arduino UNO
2. HC-05 Bluetooth Module
3. LCD to I2C Module
4. 16*2 LCD display

LCD to I2C Module With Arduino:

connect the LCD to I2C Module VCC pin to Arduino 5v pin, GND pin to GND pin, SDA pin to Arduino pin A4 and SCL to Arduino pin A5

HC-05 Bluetooth Module With Arduino:

connect the HC-05 Bluetooth module VCC pin to Arduino 3.3v pin, GND pin to GND pin, TXD pin to Arduino pin 5 and RXD to Arduino pin 3

Get the Bluetooth Terminal app (App used in this project):

https://play.google.com/store/apps/details?id=com.locominder.bluetoothserialmonitor

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>

// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);
SoftwareSerial BTSerial(10,11); // RX, TX


void setup()
{
 // Initialize the LCD display
 lcd.init(); 
 // Turn on the backlight
 lcd.backlight();
 // Set the cursor to the first column of the first row
 lcd.setCursor(0, 0);

 // Start the serial communication
 BTSerial.begin(9600); 

 
}

void loop()
{

 // Check if there is data available on the serial port
 if (BTSerial.available()) {
  // Read the data and store it in a string
  String input = BTSerial.readStringUntil('\n');

  // Clear the LCD display
  lcd.clear();
  
  // Determine if the input string fits on the first line
  if (input.length() <= 16) {
   // Set the cursor to the first column of the first row
   lcd.setCursor(0, 0);
   // Print the input string on the LCD display
   lcd.print(input);
  } else {
   // Print as much of the input string as will fit on the first line
   lcd.setCursor(0, 0);
   lcd.print(input.substring(0, 16));
   // Print the remainder of the input string on the second line
   lcd.setCursor(0, 1);
   lcd.print(input.substring(16));
  }
 }
}

Thank you for reading. Enjoy the project output in the video.