The project aims to design an automated greenhouse monitoring and control system that continuously monitors important environmental parameters such as light intensity, humidity, water level, soil moisture, and smoke inside a greenhouse. A greenhouse is a protected structure used for growing plants under controlled conditions, helping crops avoid excessive heat, cold, dust, pests, and other environmental effects. The system uses sensors such as an LDR for sunlight detection, a humidity sensor, a water level sensor, a soil moisture sensor, and a smoke sensor to collect real-time data. A microcontroller processes the sensor data and displays the values on an LCD screen.

Based on the sensor readings, the microcontroller automatically controls various devices through relays. It switches ON the water pump when the water level is low, operates a valve for irrigation when the soil becomes dry, controls an exhaust fan to regulate humidity, activates a water sprinkler and window mechanism when sunlight is excessive, and starts a cooling fan if smoke is detected. A GSM modem is also connected to the system, allowing users to receive greenhouse parameter values through SMS from a remote location. The entire system is programmed using Embedded C, providing an efficient and automated solution for greenhouse monitoring and control.          

The main objectives of this project are:  

1. Maintaining the conditions suitable for green house.
2. Monitoring the Green house remotely using GSM modem.
3. Soil moisture sensor-based valve operation
4. Water level sensor-based water pump control
5. Smoke sensor-based DC coolant fan control
6. LDR sensor-based Windows open/close and water sprinkler control
7. Humidity sensor-based exhaust fan control
8. Smoke sensor-based windows open or close.

         

The main building blocks of the project are:  

1. Regulated power supply.
2. Relay with driver.
3. DC coolant fan
4. Water sprinkler
5. Exhaust fan
6. LCD
7. Water level sensor.
8. Humidity sensor
9. Soil moisture sensor
10. Smoke sensor.
11. Reset.
12. LCD display with driver.
13. LDR (Light Dependent Resistor).
14. Relay with driver.
15. GSM modem.
16. Crystal oscillator.

           

Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3.  Express SCH for Circuit design.

           

Regulated Power Supply:

                   

Block Diagram:

         

video: