Aireen

Note

This project was created as part of a research initiative on hydroponic smart agriculture at the Information Centric Networking (ICN) Laboratory in 2025. It is currently a work in progress and may be subject to changes in the near future.

Warning

The project is developed using PlatformIO IDE. To contribute or run the project, please use Visual Studio Code (VSCode) and install the required extensions as specified in this repository.

About

This research project explores the implementation of smart agriculture in a hydroponic plant system. Its primary objective is to minimize human intervention by leveraging IoT-based automation. Sensors continuously monitor environmental and water-quality parameters, and decisions are made automatically to maintain optimal conditions for plant growth. This repository contains the IoT-related firmware, hardware interface code, and automation logic. It is part of a larger initiative to build a self-sustaining hydroponic farming system.

System Design

Pinout Reference

The table below lists the default ESP32 pin assignments as defined in include/config.h. Adjust as needed.

ESP32 Pin	Sensor/Actuator
3.3v	LDR sensor primary pin
3.3v	TDS sensor VCC pin
GND	LDR sensor secondary pin (via resistor)
GND	TDS sensor GND pin
GPIO35	LDR sensor secondary pin
GPIO36	TDS sensor signal pin

Software Dependencies

This code is using some third party libraries provided by Arduino, such as follows.

• PubSubClient.h for MQTT client implementation

Future Works

• Interfacing LDR sensor
• Interfacing TDS sensor
• Implementing MQTT-based data publishing to a remote server
• Interfacing Analog pH meter
• Integrating relay control for pumps and other actuators

References

1. https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/sleep_modes.html
2. https://wiki.dfrobot.com/gravity__analog_tds_sensor___meter_for_arduino_sku__sen0244
3. https://www.instructables.com/Interfacing-Photoresistor-With-ESP32/