🖥️ Node-RED Flow Integration

This project includes a Node-RED flow for real-time IoT monitoring, database logging, and dashboard visualization.

🔹 Flow Overview

• MQTT Input: Subscribes to sensor data from channels/3201453/publish.
• SQLite Database: Stores sensor readings (Occupancy, Temperature, Humidity, Pressure, Dust, Light, Distance, Fan_State) in ALL_SENS_DATA.
• Thingspeak Integration: Sends sensor data to Thingspeak via HTTP GET requests for cloud visualization.
• Dashboard Widgets:
  • Table: Displays historical sensor logs with timestamps.
  • Charts: Line charts for each sensor vs timestamp.
  • Gauges: Real-time gauges for temperature, humidity, pressure, dust, light, and distance.
  • Custom UI Template: Occupancy status (👤 OCCUPIED / 🚫 EMPTY) with animations.

🔹 Importing the Flow

1. Copy the .json file from the NodeRED/ folder in this repo.
2. Open Node-RED editor → Menu → Import.
3. Paste the JSON code or upload the file.
4. Deploy the flow to start monitoring.

🔹 Dashboard Preview

The Node-RED dashboard provides:

• Real-time gauges for environmental conditions
• Line charts for historical trends
• Occupancy status indicator
• Fan state monitoring

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📊 Example Data Flow

1. Sensor → MQTT → Node-RED
2. Node-RED → SQLite Database (local storage)
3. Node-RED → Thingspeak (cloud visualization)
4. Node-RED → Dashboard (real-time charts, gauges, tables)

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