ESP32-LAB

ESP32-LAB is a long-term research and implementation repository for ESP32, focused on clean architecture, real-world IoT patterns, and production scalability.

This repository is not a short-lived demo project. It is designed as an ESP32 laboratory, where core features are implemented, tested, and reused across future products.

---

🎯 Goals

• Understand and implement the full capabilities of ESP32
• Apply IoT best practices (MQTT, OTA, Power, Security)
• Strictly separate business logic from hardware
• Enable development & testing without ESP32 hardware
• Seamlessly port code to real ESP32 devices
• Serve as a foundation for future IoT / audio products

---

🧱 Architecture Principles

• Core logic must be platform-agnostic

• ESP32 acts only as a platform adapter

• The same logic should run on:

  • PC mock (no hardware required)
  • Real ESP32 hardware

Core Logic (platform-agnostic)
        ↓
Platform Adapter
  - PC Mock
  - ESP32

---

📁 Repository Structure

esp32-lab/
├── README.md
├── docs/                 # Architecture & roadmap documentation
│   ├── architecture.md
│   ├── roadmap.md
│   └── conventions.md
├── core/                 # Hardware-independent logic
│   ├── network/          # Wi-Fi, MQTT, HTTP
│   ├── audio/            # Audio logic (playback, queue, state)
│   ├── system/           # State machine, configuration
│   └── utils/
├── examples/             # Feature-based ESP32 examples
│   ├── wifi/
│   ├── mqtt/
│   ├── audio/
│   ├── ble/
│   └── ota/
├── tools/
│   └── pc-mock/          # ESP32 simulation on PC
└── platformio.ini

---

🛠️ Technology Stack

• VS Code

• PlatformIO

• Frameworks:

  • Arduino (early phases)
  • ESP-IDF (advanced, optional)

• MQTT: PubSubClient

• JSON: ArduinoJson

• Audio: ESP32-audioI2S

• MQTT Broker: Mosquitto / HiveMQ

---

🗺️ Feature Roadmap

Phase 1 – Foundation

• Wi-Fi connection & reconnection
• Logging & configuration management
• JSON parsing & validation

Phase 2 – IoT Communication

• HTTP client
• MQTT publish / subscribe
• Command & message schema

Phase 3 – Architecture

• Event-driven design
• State machine
• Retry, timeout & error handling

Phase 4 – Audio

• Download MP3 from URL
• Low-bitrate MP3 playback
• Audio queue & interrupt handling

Phase 5 – No-Hardware Testing

• PC-based ESP32 mock
• MQTT + API integration tests
• Simulated audio output

Phase 6 – Advanced ESP32

• OTA updates
• Power management (sleep modes)
• BLE
• Security (TLS, certificates)

---

🔁 Development Workflow

1. Implement features in core
2. Test using PC mock
3. Port adapter to ESP32 hardware
4. Upload via PlatformIO
5. Optimize memory & performance
6. Prepare OTA deployment

---

🚫 Non-Goals

• No dependency on ESP32 emulators
• No hardware-coupled business logic
• No single-use demo code

---

🏁 Conclusion

ESP32-LAB is designed to:

• Provide a structured way to master ESP32
• Enable real-world IoT & audio device development
• Serve as a reusable codebase for multiple projects

This repository is meant to evolve over years, not weeks.

---

📌 Notes

• Architecture quality is prioritized over the number of examples
• Every feature is implemented with a production mindset

---

Happy hacking 🚀