Smart Garden Watering Plus Kit with Arduino Mega + DHT22
Smart Garden Watering Plus Kit – Automated Grow Tent Climate Control with Arduino Mega & DHT22
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Take full command of your indoor garden’s climate with a self-contained control system that reads temperature, humidity, CO2, soil moisture, and light levels, then adjusts fans, heaters, CO2 injection, and grow lights automatically. Developed for serious growers and engineering projects, this kit lets you build a precision environment controller from scratch using real sensors and industrial-grade logic.
What You'll Build
You’ll assemble and program a central controller that logs sensor data from two DHT22 temperature-humidity probes, an MH-Z19B CO2 sensor, dual soil moisture sensors, and a BH1750 light sensor. The system processes these inputs to manage a 4-channel relay (for fans, heater, CO2 solenoid) and a MOSFET-based LED dimmer, maintaining optimal growing conditions. Real-time readings appear on an OLED display, and all data is time-stamped and stored on a microSD card via the DS3231 RTC.
What You'll Learn
- Integrate DHT22 and MH-Z19B sensors for multi-point climate monitoring and data aggregation
- Implement adaptive control logic that coordinates relay-driven actuators and a PWM-dimmable LED channel
- Design a long-term data logger with RTC synchronization and SD card storage for trend analysis
- Build a standalone embedded system that operates independently after programming, with no laptop required
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| DHT22 | 2 |
| MH-Z19B CO2 | 1 |
| Soil Moisture Sensor | 2 |
| BH1750 | 1 |
| 4-ch Relay Module | 1 |
| IRF540N MOSFET | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 10 |
| 100nF Capacitors | 15 |
| PCB Prototype Board | 3 |
| 12V 3A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is built for B.Tech ECE/EEE students tackling final-year projects in smart agriculture, product designers prototyping IoT-enabled grow systems, and Smart India Hackathon teams automating controlled environment agriculture. It also suits advanced hobbyists wanting a production-grade climate controller for their indoor garden.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code to launch the AI companion that guides you step by step, and reach our support team via WhatsApp for quick troubleshooting.
Can this kit control AC-powered devices like a heater or fan?
Yes, the included 4-channel relay module is rated for 250V AC, and we provide wiring diagrams to safely integrate your external equipment.
Does the kit include sensors for outdoor soil monitoring?
The kit includes two resistive soil moisture sensors ideal for indoor pots or grow trays. For outdoor gardens, you can easily swap them with capacitive sensors using the same interface.
Will this work without a laptop once programmed?
Absolutely. The Arduino Mega runs standalone after you upload the code, and the OLED shows real-time data so you can monitor conditions without a computer.
Garden — DHT22, CO2, soil and lux all control tent fan, heater, CO2 solenoid and LED dimmer together.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items