Automatic Plant Watering Kit with Arduino & Soil Sensor - Compoden
Build Your Own Automatic Plant Watering System with Arduino Uno - No More Over or Under Watering
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn your houseplant care into a hands-free automated system. This intermediate kit lets you build a smart monitor that senses soil moisture and activates a pump only when the soil is truly dry - preventing root rot and pump chatter with hysteresis control. All while displaying live moisture readings on an LCD, so you'll always know your plant's thirst level at a glance.
What You'll Build
You'll assemble a working automatic irrigation system that uses two soil moisture sensors for precise readings, a relay-driven mini submersible pump, and an LCD dashboard. The Arduino code implements hysteresis logic to delay pump activation until the soil crosses a low threshold and keeps it running until moisture is restored, avoiding rapid on-off cycling. The result is a compact unit you can place next to any potted plant, giving it exactly the water it needs, when it needs it.
What You'll Learn
- Calibrating analog soil moisture sensors and mapping values to meaningful moisture levels.
- Programming Arduino Uno with hysteresis logic to control actuator timing and prevent false triggers.
- Wiring and controlling a relay module safely with flyback diode protection for inductive pump loads.
- Integrating an I2C LCD to display live sensor data and system status in real time.
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 |
| 10k? Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 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
Designed for intermediate learners, this kit suits CBSE Class 11-12 students exploring embedded systems for their science exhibition projects, B.Tech ECE/EEE students building home automation prototypes for hackathons like Smart India Hackathon, and ATL Tinkering Lab facilitators running sensor-integration workshops. If you've built a basic Arduino LED blink before and want to tackle real-world sensor-actuator control, this project bridges the gap.
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 inside the box to chat with our AI build companion, which knows every line of code and wiring detail of this kit. You can also message us on WhatsApp for human backup if you prefer.
Will the moisture sensor corrode over time in wet soil?
The kit uses resistive soil moisture sensors. While brief contact with soil is fine, we recommend coating the sensor prongs with clear nail polish or epoxy to extend lifespan, especially in continuously moist environments. The dual-sensor design lets you replace one without stopping the system.
Can I adapt this kit for multiple plants?
Yes, the hysteresis logic is modular. By adding more sensor-relay pairs and expanding the Arduino's I/O, you can monitor up to 4 plants with the same controller. The kit's breadboard gives you the flexibility to prototype multi-zone irrigation.
Do I need to solder anything?
No soldering is needed. All connections are made on the breadboard using the included jumper wires. The I2C backpack snaps onto the LCD, and the pump's wires connect to the relay terminal block.
Houseplant - Soil moisture sensor triggers relay-driven pump when soil is dry. LCD shows live moisture. Hysteresis prevents pump 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