E&TC / ECE · IoT · Final year project
Greenhouse Monitoring and Control System using IoT
An IoT system that keeps greenhouse conditions right for crops. Sensors measure temperature, humidity, soil moisture and light, and the controller runs fans, pumps and lights automatically while sending readings to an online dashboard.
What is the Greenhouse Monitoring and Control System using IoT project?
An IoT system that keeps greenhouse conditions right for crops. Sensors measure temperature, humidity, soil moisture and light, and the controller runs fans, pumps and lights automatically while sending readings to an online dashboard.
Key facts
- Branch
- Electronics & Telecommunication (E&TC / ECE); also suits Instrumentation
- Domain
- IoT projects
- Type
- Final year project · Advanced
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 6 to 8 weeks
- Estimated component cost
- ₹3,000 – ₹4,400
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Greenhouse Monitoring and Control System using IoT works
- 12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Soil moisture sensor measures how wet the soil is so watering happens only when needed.
- The LDR light sensor senses whether it is light or dark so lights can switch automatically.
- The Temperature sensor measures the temperature that the system monitors or controls.
- The Push buttons and switches provide manual inputs and the power switch.
- The NodeMCU ESP8266 Wi-Fi board connects the system to Wi-Fi so readings can be pushed to an IoT dashboard and commands received from a phone.
- The DC cooling fan moves air for cooling or ventilation.
- The Mini submersible water pump moves water for irrigation, dispensing or cooling.
- The 16×2 LCD with I2C adapter shows readings, status and messages to the user.
- The LEDs indicate status.
Block diagram
Inputs
Soil moisture sensorLDR light sensorTemperature sensorPush buttons and switchesController
NodeMCU ESP8266 Wi-Fi boardOutputs
DC cooling fanMini submersible water pump16×2 LCD with I2C adapterLEDsComponents list and cost
Typical prices from Indian online stores and electronics markets (Lamington Road, Budhwar Peth, SP Road). Buy from one store where you can to save on shipping.
| Component | Qty | What it does | Approx. cost |
|---|---|---|---|
| NodeMCU ESP8266 Wi-Fi board | 1 | Connects the system to Wi-Fi so readings can be pushed to an IoT dashboard and commands received from a phone. | ₹280 |
| Soil moisture sensor | 1 | Measures how wet the soil is so watering happens only when needed. | ₹80 |
| LDR light sensor | 1 | Senses whether it is light or dark so lights can switch automatically. | ₹15 |
| Temperature sensor (LM35 / DS18B20) | 1 | Measures the temperature that the system monitors or controls. | ₹90 |
| Push buttons and switches | 2 | Provide manual inputs and the power switch. | ₹80 |
| DC cooling fan (12 V) | 1 | Moves air for cooling or ventilation. | ₹120 |
| Mini submersible water pump (12 V) | 1 | Moves water for irrigation, dispensing or cooling. | ₹180 |
| 16×2 LCD with I2C adapter | 1 | Shows readings, status and messages to the user. | ₹220 |
| LEDs (assorted) | 1 | Indicate status. | ₹20 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| At mega Controller | 1 | Part from the design specification | ₹150* |
| WIFI | 1 | Part from the design specification | ₹150* |
| Bulb holder | 1 | Part from the design specification | ₹150* |
| Passive components, PCB and wiring kit | 1 | Crystal oscillator, resistors (assorted), capacitors (assorted), transistors / MOSFETs, cables, connectors and jumper wires, diodes, PCB / breadboard and ICs and IC sockets. | ₹445 |
| Wiring, PCB, soldering and enclosure | 1 | Project overhead | ₹450 |
| Demo model base / mounting board | 1 | Project overhead | ₹500 |
| Testing spares and replacements | 1 | Project overhead | ₹300 |
| Estimated total | Varies with brand, quality and city | ₹3,000 – ₹4,400 |
Prices are estimates for budgeting; items marked * depend on the exact size or model chosen. We confirm the bill of materials when your design is frozen, and components are charged at actual cost with bills.
How much does this project cost?
| Option | What you get | Cost |
|---|---|---|
| Components only | You buy the parts and build it yourself | ₹3,000 – ₹4,400 |
| Hardware / IoT Final Year | Working model or guided build, Circuit diagram and bill of materials, Firmware / code with explanation | from ₹9,999 + components |
| Capstone Project (CPE) | Working project or model, Black book in MSBTE format, Step-by-step explanation | ₹9,999 + components |
| Diploma ITR | 100% working source code, Project report PDF, PPT | ₹1,999 + components |
No GST and no hidden charges. Use the cost calculator for a quote with your deadline and add-ons, or see all plans.
Download the project brief (PDF)
Summary, working, components and cost and viva questions on one branded PDF to show your guide or team. To get it developed, contact us on WhatsApp.
What you submit with this project
- Working model with circuit diagram and program code
- Project report or black book in your university's chapter order (block diagram, circuit, calculations, results)
- Presentation for the review and final viva
- Synopsis for topic approval, if your college asks for one
E&TC / ECE viva questions on this project
What is the aim of the Greenhouse Monitoring and Control System using IoT project?
An IoT system that keeps greenhouse conditions right for crops. Sensors measure temperature, humidity, soil moisture and light, and the controller runs fans, pumps and lights automatically while sending readings to an online dashboard.
Explain the working of your project in short.
12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V. The Soil moisture sensor measures how wet the soil is so watering happens only when needed. The LDR light sensor senses whether it is light or dark so lights can switch automatically. The Temperature sensor measures the temperature that the system monitors or controls.
What is NodeMCU and how does it connect to the internet?
NodeMCU is a development board built on the ESP8266 Wi-Fi chip. It joins a Wi-Fi network using the SSID and password in the code and sends data over HTTP or MQTT to a cloud server.
How does a soil moisture sensor work?
The two probes measure the soil's resistance. Wet soil conducts better, so the resistance and output voltage change, which tells the controller when to start the pump.
How does an LDR work?
An LDR is made of cadmium sulphide. In light its resistance drops to a few hundred ohms, and in darkness it rises to about a megaohm. Used in a voltage divider, it gives a voltage that depends on light.
How does the LM35 temperature sensor work?
LM35 gives an analog output of 10 mV per °C, so 250 mV means 25 °C. The controller reads it with the ADC and converts the value to degrees.
Why is a pull-up resistor needed with a push button?
Without it the input pin floats and reads random values. The pull-up keeps it HIGH until the button connects it to ground.
Explain the block diagram of your project.
The input section senses the real-world quantity, the NodeMCU ESP8266 Wi-Fi board processes it according to the program, and the output section acts locally and sends the data or alert wirelessly. The power supply section feeds every block.
Which communication protocols are used between the modules?
UART (serial) for the GSM, GPS, Bluetooth or fingerprint modules, I2C for the display, RTC or motion sensor (only SDA and SCL lines), a single-wire digital protocol for the temperature sensor and analog inputs read by the ADC for the analog sensors. Each protocol was chosen because the module supports it and it uses the fewest pins.
What is the operating voltage of the circuit?
The controller and most sensors work at 5 V (ESP boards and some modules at 3.3 V). A 12 V adapter powers the board, and a regulator steps it down. Motors and relays get their own supply line so they do not reset the controller.
What is the difference between accuracy and precision?
Accuracy is how close a reading is to the true value. Precision is how close repeated readings are to each other. A sensor can be precise but inaccurate if it is not calibrated.
Related projects
Academic use: Project Buddyy offers mentoring, guidance and reference material for learning. You stay responsible for following your institution's academic integrity rules and for understanding everything you submit.
Want to build Greenhouse Monitoring and Control System using IoT?
Send your college, deadline and team size. We confirm the scope, cost and what you will submit.