A greenhouse is a specially constructed building designed to create and control environmental conditions to optimize plant growth. It allows for better management of factors such as temperature, humidity, and soil moisture, providing more consistent and improved crop yields compared to plants cultivated outdoors. However, the use of internet technology in greenhouse monitoring and control systems is still limited. To address this, the proposed project aims to develop a smart greenhouse monitoring system that can be remotely monitored and controlled through an internet connection using the ThingSpeak application on a smartphone.

The main objective of this project is to design a greenhouse monitoring system using IoT and ThingSpeak technology. The system is capable of measuring key environmental parameters such as humidity, temperature, rainfall, and soil moisture content using sensors interfaced with a NodeMCU microcontroller. A relay module acts as a switch to automatically turn ON or OFF devices such as water pumps and cooling fans based on real-time sensor data received from the NodeMCU. The collected data is uploaded to the ThingSpeak cloud along with the date and time, enabling users to monitor greenhouse conditions remotely. With their login credentials, users can access this information from anywhere in the world via their smartphones.

The project makes use of the NodeMCU, an open-source IoT platform based on the ESP8266 Wi-Fi module, which enables wireless communication and data transfer. In addition to providing Wi-Fi connectivity, the NodeMCU supports essential microcontroller features such as GPIO, PWM, and ADC, making it suitable for managing the entire greenhouse system independently. This smart greenhouse solution helps in automating plant care, improving efficiency, and enabling remote monitoring, thus advancing modern agricultural practices.

 

  The major features of this project are:

• Using thingspeak technology to upload the sensor data into the thingspeak cloud.
• Using NODEMCU to achieve this task.
• DHT11 sensor-based temperature and humidity detection.
• Automatic water pump control based on soil moisture using soil moisture sensor.
• Automatic Rain detection using sensor.

The major building blocks of this project are:

• Adapter Power Supply.
• Embedded c language.
• Dht11(temperature, Humidity Sensor)
• Rain sensor.
• Soil Moisture Sensor.
• Relays.

Software’s used:

1. Arduino ide Compiler to write the program.
2. Embedded c language.
3. Thingspeak cloud.
4. Express SCH for Circuit design.

          Regulated Power Supply:   Block Diagram:       video: