IoT Smart Farming System

This repository contains the code for an IoT-based smart farming system. It integrates multiple sensors for environmental monitoring and uses MQTT for real-time communication, facilitated by the CloudAMQ provider.

Overview

The system employs an ESP32 microcontroller to gather data from the following sensors:

• BH1750: Measures light intensity.
• DHT11: Measures temperature and humidity.
• Two NPK sensors: Measure soil nutrient levels (Nitrogen, Phosphorus, and Potassium).

An LCD display is used to visualize data locally, where the right bottom corner shows the number of connected sensors.

Code Structure

This project includes six files, with the final and most updated version being:

• Mfarming_read_rev8: The final version of the code. This is the file to flash onto your ESP32 device for deployment.

Features

• Light Intensity Monitoring: Data from the BH1750 sensor is published via MQTT.
• Temperature and Humidity Monitoring: Data from the DHT11 sensor is published via MQTT.
• Soil Nutrient Monitoring: Data from the two NPK sensors is published via MQTT.
• Relay Control: MQTT subscriptions enable controlling external devices like irrigation systems and lighting through defined topics.
• LCD Display: The LCD shows sensor data, and the number of sensors is displayed in the right bottom corner.

MQTT Topics

Publish Topics (Sensor Data)

• farm/bht: Publishes light intensity data from the BH1750 sensor.
• farm/npk1: Publishes soil nutrient data from NPK sensor 1.
• farm/npk2: Publishes soil nutrient data from NPK sensor 2.

Subscribe Topics (Relay Control)

• relay1: Controls the first relay.
• relay2: Controls the second relay.
• relay3: Controls the third relay.
• relay4: Controls the fourth relay.
• relay5: Controls the fifth relay.
• relay6: Controls the sixth relay.

CloudAMQ Configuration

The system uses CloudAMQ as the MQTT broker provider. Ensure you configure your credentials (broker address, username, and password) in the code to enable MQTT communication.

Hardware Requirements

• Microcontroller: ESP32
• Sensors:
  • BH1750 for light intensity
  • DHT11 for temperature and humidity
  • Two NPK sensors for soil nutrients
• LCD Display: For visualizing sensor data and indicating the number of sensors
• Relays: For controlling external devices

Getting Started

1. Clone the Repository:

   git clone <repository-url>
   

2. Final Code: The Mfarming_read_rev8 file is the final version of the code. Use this file to flash onto your ESP32.

3. Configure CloudAMQ: Update the code with your CloudAMQ broker details (address, username, and password).

4. Use the LCD Display: The LCD will display real-time sensor data, with the sensor count visible in the bottom-right corner.

5. Run the System: Once deployed, the ESP32 will publish sensor data to the specified MQTT topics and receive commands from the subscribed relay topics.

Dependencies

• ESP32 board
• Libraries:
  • Adafruit_BH1750 for the BH1750 sensor
  • DHT sensor library for the DHT11 sensor
  • ModbusMaster for NPK sensor communication
  • PubSubClient for MQTT communication
  • LiquidCrystal_I2C for the LCD display

Future Enhancements

• Add additional MQTT topics for controlling more devices (e.g., relay3, relay4).
• Expansion to more sensors or automated farming systems.

Contributing

Contributions are welcome! Please submit any issues or pull requests to help improve the system.

License

This project is licensed under the MIT License.