Hidro32 - Smart Hydroponics Monitoring System

An IoT solution developed for ESP32 using PlatformIO and Arduino framework. This system monitors water quality parameters (pH and TDS/PPM) in real-time and synchronizes data with a cloud broker via MQTT.

🚀 Key Features

• Real-time Monitoring: Precise acquisition of pH and TDS (Total Dissolved Solids) data using analog sensors.
• Signal Processing: Implementation of median filtering algorithms to stabilize noisy analog sensor readings.
• Hybrid Communication: Uses HTTP POST requests to fetch dynamic MQTT credentials via webhooks.
• MQTT Integration: Reliable data transmission to a broker with automatic reconnection logic for both WiFi and MQTT sessions.
• JSON Serialization: Efficient data packaging using ArduinoJson for structured telemetry.

🛠️ Tech Stack

• Hardware: ESP32 (NodeMCU-32S).
• Language/Framework: C++ / Arduino.
• IDE/Tooling: PlatformIO.
• Protocols: MQTT, HTTP, TCP/IP.
• Libraries: PubSubClient, ArduinoJson, IoTicosSplitter.

📂 Project Structure

• src/main.cpp: Core logic including sensor processing and network management.
• include/Colors.h: Custom header for ANSI color-coded serial debugging.
• lib/IoTicosSplitter: Private library for string parsing and data manipulation.
• platformio.ini: Project configuration, dependency management, and build-time environment variables.

⚙️ Setup and Deployment

Configuration

Credentials are managed through build_flags in platformio.ini to avoid exposing sensitive data in source code:

1. Open platformio.ini.
2. Update the build_flags section with your network details:
   • WIFI_SSID, WIFI_PASS, MQTT_SERVER, WEBHOOK_ENDPOINT.

Compilation

Using PlatformIO CLI or IDE:

# Build project
pio run

# Upload to ESP32 and open monitor
pio run --target upload --target monitor

Developed by benjoks.