Create LCD-DISPLAY-MODULE.md

Author: ThiruXD

Documentation/LCD-DISPLAY-MODULE.md

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+# 16x2 LCD Display with I2C Module
+
+This repository provides setup instructions and example code for using a **16x2 LCD display with an I2C module** on an Arduino.
+
+## 📌 Features
+- Uses I2C interface (SDA, SCL) to communicate with the LCD
+- Requires only two pins, saving digital pins for other components
+- Supports 16 characters per row and 2 rows
+- Adjustable backlight and contrast
+
+---
+
+## 🛠 Requirements
+### 🔹 Hardware:
+- Arduino Board (Uno, Mega, Nano, etc.)
+- 16x2 LCD Display with I2C Module
+- Jumper Wires
+
+### 🔹 Software:
+- **Arduino IDE** (Download: [https://www.arduino.cc/en/software](https://www.arduino.cc/en/software))
+- **LiquidCrystal I2C Library** (Install from Arduino Library Manager)
+
+---
+
+## ⚡ Wiring Diagram
+Connect the LCD module to the Arduino as follows:
+
+| **LCD Pin** | **Arduino UNO Pin** |
+|------------|----------------|
+| **VCC** | **5V** |
+| **GND** | **GND** |
+| **SDA** | **A4** |
+| **SCL** | **A5** |
+
+📌 **For Arduino Mega:**
+- **SDA → Pin 20**
+- **SCL → Pin 21**
+
+---
+
+## 📥 Library Installation
+1. Open **Arduino IDE**
+2. Go to **Sketch → Include Library → Manage Libraries**
+3. Search for **LiquidCrystal I2C**
+4. Install the library by **Frank de Brabander**
+
+---
+
+## 🚀 Example Code
+Upload the following code to test your LCD module:
+
+```cpp
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+
+LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 if needed
+
+void setup() {
+  lcd.init();  
+  lcd.backlight();
+  lcd.setCursor(0, 0);
+  lcd.print("Hello, World!");
+}
+
+void loop() {
+}
+```
+
+🔹 If the LCD does not display anything:
+- Run an **I2C Scanner** to check the address (might be `0x3F` instead of `0x27`)
+- Adjust the **blue contrast potentiometer** on the back of the module
+
+---
+
+## 🔍 I2C Address Scanner (Debugging)
+Use this code to find the correct I2C address:
+
+```cpp
+#include <Wire.h>
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println("Scanning for I2C devices...");
+  Wire.begin();
+}
+
+void loop() {
+  byte error, address;
+  int nDevices = 0;
+  
+  for (address = 1; address < 127; address++) {
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+    
+    if (error == 0) {
+      Serial.print("I2C device found at address 0x");
+      Serial.println(address, HEX);
+      nDevices++;
+    }
+  }
+  
+  if (nDevices == 0) Serial.println("No I2C devices found");
+  delay(5000);
+}
+```
+
+---
+
+## 📌 Notes
+- If you see **garbled characters** or **no display**, try adjusting the **contrast**.
+- Double-check **wiring connections** and **I2C address**.
+- Ensure **LiquidCrystal I2C library** is installed.
+
+---
+
+## 📜 License
+This project is open-source and available under the **MIT License**.
+
+---
+
+## 🙌 Credits
+- Developed by **Your Name**
+- Based on the work of **Arduino Community**
+- GitHub Repository: [Your Repo Link](#)
+
+🚀 **Happy Coding!** 🎉