Arduino Morse Code Encoder/Decoder

📋 Description

An intelligent Arduino-based Morse code decoder that can interpret Morse code signals from multiple input sources. The system features dual sensor support (LDR for light-based signals and piezo for sound/vibration), real-time decoding, and LCD display output. Perfect for educational purposes, amateur radio enthusiasts, or anyone interested in learning Morse code.

✨ Features

• Dual Input Support: Light Detection Resistor (LDR) and Piezo sensor
• Real-time Decoding: Instant Morse code to text conversion
• LCD Display: 16x2 I2C LCD for output visualization
• Simulation Mode: Built-in demonstration with "PES" example
• Adjustable Sensitivity: Potentiometer-controlled sensor selection
• Serial Monitor Output: Debug and monitoring capabilities
• Complete Alphabet Support: A-Z character recognition

🔧 Hardware Requirements

Components

• Arduino Uno/Nano/Pro Mini
• 16x2 LCD with I2C backpack
• Light Dependent Resistor (LDR)
• Piezo sensor/buzzer
• 10kΩ Potentiometer
• Resistors (10kΩ for LDR pull-down)
• Jumper wires
• Breadboard

Pin Configuration

Component	Arduino Pin	Description
LDR	A0	Light sensor input
Piezo	A1	Sound/vibration sensor
Potentiometer	A2	Mode selection
LCD SDA	A4	I2C data line
LCD SCL	A5	I2C clock line

🔌 Circuit Diagram

📚 Libraries Required

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

Install via Arduino Library Manager:

• LiquidCrystal I2C by Frank de Brabander

🚀 Installation

1. Clone the repository

   git clone https://github.com/Kathitjoshi/arduino-morse-encoder-decoder.git
   cd arduino-morse-encoder-decoder

2. Install required libraries

   • Open Arduino IDE
   • Go to Sketch → Include Library → Manage Libraries
   • Search for "LiquidCrystal I2C" and install

3. Upload the code

   • Connect your Arduino to your computer
   • Open the .ino file in Arduino IDE
   • Select your board and port
   • Click Upload

🎮 Usage

Simulation Mode

The device starts in simulation mode and automatically decodes "PES" to demonstrate functionality.

Sensor Mode

1. LDR Mode: Turn potentiometer fully left

   • Flash a light (flashlight, laser) in dot/dash patterns
   • Short flash = dot (·)
   • Long flash = dash (−)

2. Piezo Mode: Turn potentiometer fully right

   • Tap or create vibrations in dot/dash patterns
   • Short tap = dot (·)
   • Long tap = dash (−)

Timing Guidelines

• Dot Duration: ~200ms
• Dash Duration: ~600ms
• Character Pause: ~800ms
• Word Pause: ~1400ms

📖 Morse Code Reference

Letter	Code	Letter	Code	Letter	Code	Letter	Code
A	·−	B	−···	C	−·−·	D	−··
E	·	F	··−·	G	−−·	H	····
I	··	J	·−−−	K	−·−	L	·−··
M	−−	N	−·	O	−−−	P	·−−·
Q	−−·−	R	·−·	S	···	T	−
U	··−	V	···−	W	·−−	X	−··−
Y	−·−−	Z	−−··

⚙️ Configuration

Adjustable Parameters

const int threshold = 500;        // Sensor sensitivity
const int dotDuration = 200;      // Dot timing (ms)
const int dashDuration = 600;     // Dash timing (ms)
const int charPause = 800;        // Character separation (ms)
const int wordPause = 1400;       // Word separation (ms)

LCD I2C Address

If your LCD doesn't work, try changing the I2C address:

LiquidCrystal_I2C lcd(0x3F, 16, 2);  // Try 0x3F instead of 0x27

🔍 Troubleshooting

Problem	Solution
LCD not displaying	Check I2C address (0x27 or 0x3F)
Sensor not responsive	Adjust threshold value
Incorrect decoding	Check timing parameters
No output	Verify wiring connections

📈 Future Enhancements

• Support for numbers and punctuation
• Adjustable speed settings
• Audio feedback
• Memory storage for messages
• Wireless transmission capability
• Mobile app integration

🤝 Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👨‍💻 Author

Made By Kathit Joshi, Kavyansh Jain, and Mahashwetha Panigrahi with 💗

🙏 Acknowledgments

• Arduino community for excellent documentation
• Morse code enthusiasts and amateur radio operators
• Open source contributors

📞 Support

If you encounter any issues or have questions:

• Open an issue on GitHub
• Check the troubleshooting section
• Contact via email: your.email@example.com

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