Celest is an ESP-IDF-based firmware designed for robust UART-to-TCP bridging. It serves as a flexible framework for communication between embedded devices and network interfaces, with a focus on modularity and maintainability.

• UART-to-TCP Bridge: Efficient communication via serial and TCP/IP protocols.
• Modular Architecture: Ongoing refactoring to enhance structure and reusability.
• ESP-IDF Integration: Built to leverage the robust features of the ESP-IDF ecosystem.

This repository is currently in pre-alpha with an emphasis on:

• Refactoring the primary logic in app_main.c into a modular file structure.
• Improving readability, maintainability, and scalability.

The app_main function serves as the entry point for the firmware and initializes critical components:

1. Hardware Initialization:

   • Configures UART for serial communication.
   • Sets up GPIO and other required peripherals.

2. Task Creation:

   • Creates FreeRTOS tasks for handling TCP and UART communication asynchronously.

3. Network Initialization:

   • Configures the ESP32 to connect to a network via Wi-Fi.
   • Establishes a TCP server for incoming connections.

4. Event Handling:

   • Manages UART data transmission to TCP and vice versa using buffers.
   • Ensures error handling and reconnections for robust performance.

The goal of the ongoing refactor is to modularize these responsibilities, separating concerns into distinct files to simplify maintenance and testing.

Key components include:

• src/: Contains the core application logic.
  • app_main.c: Entry point for the firmware, managing initialization and task handling. (Under refactoring)
• include/: Header files for modularized components.
• build.sh: Script for building the firmware.

1. Set up the ESP-IDF environment.
2. Clone the repository:

   git clone https://github.com/vikramvel/esp32_celest.git
   cd esp32_celest

3. Execute the build script:

   ./build.sh

• Modular separation of UART and TCP handling logic.
• Integration of testing frameworks for better reliability.
• Improved documentation and examples.

This project is licensed under the GPL-2.0 License.