Automatic Plant Watering System Kit with Arduino Uno + Sensor
Build an Automatic Plant Watering System with Arduino Uno — No More Wilted Plants, Even When You're Away
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine coming home to perfectly watered plants every day, even while you’re on vacation. This kit lets you assemble a soil‑moisture‑sensing irrigation controller that triggers a pump only when the earth is dry, complete with hysteresis to stop relay chatter. It’s a real-world embedded system that directly serves agriculture, ideal for school assessments, hackathon prototypes, or keeping a balcony garden thriving.
What You'll Build
A fully functional automatic watering system that reads moisture from two analog sensors, displays live moisture values on a 16×2 LCD, and switches a submersible pump on or off through a relay. The embedded hysteresis ensures the pump doesn’t flutter when the soil is borderline, giving you a stable, crop‑ready control loop that can be extended to multiple pots or greenhouse trays.
What You'll Learn
- Interfacing analog soil moisture sensors with Arduino’s ADC and mapping raw values to meaningful moisture levels
- Driving a 5V relay safely — why the flyback diode matters and how to wire the pump circuit
- Displaying real-time sensor data on an I2C‑backpacked LCD with minimal pin usage
- Implementing hysteresis logic in code to eliminate chatter and create a robust on/off control system
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | ×1 |
| Soil Moisture Sensor | ×2 |
| 5V Relay Module | ×1 |
| Mini Submersible Pump | ×1 |
| Silicone Tube 30cm | ×1 |
| 16x2 LCD | ×1 |
| I2C Backpack | ×1 |
| 1N4007 Diode | ×5 |
| 10kΩ Resistors | ×5 |
| 100nF Capacitors | ×5 |
| 400-pt Breadboard | ×1 |
| Male-to-Male Jumper Wires (25 pcs) | ×25 |
| 9V Battery Snap | ×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 intermediate kit is purpose‑built for CBSE Class 11 and 12 students tackling electronics board practicals or investigatory projects, and for B.Tech ECE/EEE sophomores who need a working mini project that demonstrates sensor‑driven control. It’s also used by Smart India Hackathon agriculture track teams, ATL Tinkering Labs introducing automation, and engineering prototypes at IIT, NIT, VIT, and BITS Pilani where a reliable irrigation system is the starting point for smarter farming solutions.
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 in the box to access an AI companion trained on this exact project. If you need human backup, reach out via WhatsApp — we respond within 5 business hours.
Can I use this system for multiple plants?
Yes, with two soil moisture sensors you can monitor two separate pots or average readings. For more, you can daisy-chain additional sensors (purchase separately) and modify the code to scan multiple channels.
How do I prevent the sensor probes from corroding?
The kit includes 10kΩ resistors to limit current and reduce electrolysis. Dip only the tips and consider coating the leads with a thin layer of epoxy. For long-term use, wipe the probes clean periodically.
Can I drive a 12V pump instead of the included 5V one?
The relay can switch higher voltages, so you can connect an external 12V pump using a separate 12V supply. However, the included mini pump is matched to the kit for safe, low‑voltage learning.
Soil moisture sensor triggers relay pump when dry. LCD shows live moisture. Hysteresis prevents chatter.
What's in this kit
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