Morse Link
An offline Android application that converts text into Morse code and transmits it through a smartphone's flashlight and speaker without requiring an internet connection.
- RoleEnd-to-End Product Development
- PlatformNative Android Application
- FocusHardware Integration & Offline Communication
Problem
Modern mobile applications rarely demonstrate how built-in smartphone hardware can be used to communicate information entirely offline through universally recognized Morse code.
Solution
Morse Link converts text into Morse code and transmits it through the device's flashlight and speaker while performing all processing locally, eliminating the need for internet connectivity or cloud services.
Users
- • Students
- • Hobbyists
- • Android Users
Outcome
A lightweight offline communication tool that showcases Android hardware integration, real-time signal generation, and intuitive user interaction.
App Previews
Problem breakdown
Communication
- • Few modern apps demonstrate practical Morse code communication
- • Most communication tools rely on internet connectivity
- • Offline alternatives are often limited or outdated
Hardware Utilization
- • Smartphone hardware capabilities are often underutilized
- • Integrating multiple hardware components requires careful synchronization
- • Maintaining compatibility across Android devices presents implementation challenges
User Experience
- • Users need a simple workflow from text input to transmission
- • Long-running transmissions require playback controls
- • The interface should remain intuitive for users unfamiliar with Morse code
Design intent
Offline by default
Every feature operates entirely on the device, ensuring reliable communication regardless of internet availability.
Hardware-driven experience
The application transforms built-in smartphone hardware into communication devices by coordinating flashlight and audio signal generation.
Simple interaction
The workflow minimizes complexity by guiding users from text input to Morse transmission in only a few straightforward steps.
User control
Playback controls allow users to pause, resume, or cancel transmissions at any time, providing flexibility during longer messages.
User flows
Message transmission
Goal: Convert a text message into Morse code and transmit it offline.
- 01
Launch the application
- 02
Enter a message
- 03
Convert the message into Morse code
- 04
Start the transmission
- 05
Transmit Morse signals through the flashlight and speaker
- 06
Pause, resume, or cancel when needed
A short, linear workflow keeps the application accessible while allowing users to maintain full control over ongoing transmissions.
Signal generation
Goal: Generate synchronized Morse signals using device hardware.
- 01
Encode the entered message
- 02
Generate Morse timing sequences
- 03
Control flashlight output
- 04
Generate synchronized audio signals
- 05
Complete transmission
Separating encoding from hardware control keeps signal generation reliable while ensuring synchronized visual and audio output.
Architecture Overview
High-level breakdown of how the system is structured and how responsibilities are separated across layers.
Android Application
A native Android application responsible for message input, Morse encoding, transmission control, and user interaction.
Signal Processing
A local Morse encoder converts text into transmission sequences before coordinating flashlight and speaker output in real time.
Hardware Integration
Android hardware APIs control the device flashlight and speaker, enabling synchronized offline Morse code transmission without external services.
Result & Impact
Built a fully offline Android application for Morse code communication.
Integrated smartphone flashlight and speaker for real-time signal transmission.
Demonstrated practical Android hardware integration without cloud dependencies.
Created a lightweight communication tool focused on simplicity, reliability, and broad device compatibility.
"Want to see more or work together?"
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