Morse Transcoder IoT

Overview

The Morse Transcoder IoT is a study project combining embedded systems, IoT, and web technologies. The project allows users to send messages encoded in Morse code from a Raspberry Pi Pico W to an online chat interface via MQTT. The system features an OLED display to visualize input in real-time and integrates with AWS for cloud-based communication and alerting.

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Features

1. Morse Code Transcription:

   • Enter Morse code using two buttons:
     • Button A (GP5): Represents . (dot).
     • Button B (GP6): Represents _ (dash).
   • Displays typed Morse code and decoded characters on an OLED screen.
   • Supports special commands, such as "Enter" to send messages and "SOS" to trigger alerts.

2. IoT Communication:

   • Uses MQTT protocol for message transmission between the device and a cloud-hosted web chat.
   • Sends messages to the backend system in real-time.

3. Web Chat Interface:

   • A simple frontend to view and send messages to/from the Morse Transcoder.
   • Hosted on AWS with a backend for MQTT communication.

4. AWS Integration:

   • Uses AWS services to host the web application and trigger alerts.
   • "SOS" command sends an alert to an Amazon Alexa device.

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Components

1. Firmware

• Platform: Raspberry Pi Pico W
• Language: C
• Libraries Used:
  • ss_oled: For OLED display control.
  • BitBang_I2C: To handle I2C communication.
  • Custom morse_decoder for decoding Morse code.

2. Backend

• Technology: Node.js
• Purpose: Manages MQTT communication between the frontend and the embedded device.

3. Frontend

• Framework: React.js
• Purpose: Provides a user-friendly chat interface to send and receive messages.

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Getting Started

Prerequisites

1. Hardware:

   • Raspberry Pi Pico W.
   • OLED Display (I2C).
   • Two push buttons.
   • Breadboard and wires for prototyping.

2. Software:

   • VS Code with Pico SDK installed.
   • MQTT broker (e.g., Mosquitto).
   • AWS account for hosting the frontend and backend.

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Setting Up the Project

1. Clone the Repository:

   git clone https://github.com/<your-username>/morse-transcoder.git
   cd morse-transcoder