Arduino Uno Houseplant Auto-Watering Kit - Soil Moisture, Pump & LCD
Give Every Houseplant Exactly the Water It Needs - Arduino Uno Auto-Watering Kit with Soil Sensor & LCD
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Never guess when your ficus or peace lily needs water again. This kit turns an Arduino Uno into the brain of a self-regulating irrigation system. Two soil-moisture probes read the root zone, a relay drives a submerged pump, and a 16�2 LCD shows the live moisture percentage. Built-in hysteresis stops the pump from chattering - so your plant gets one steady drink, not a frantic on-off flood.
What You'll Build
You will assemble a standalone unit that clips onto any indoor planter. One sensor buries into the soil; the pump sits in a water reservoir with a silicone delivery tube. When the soil dries past the threshold you set, the relay clicks, the pump runs, and the LCD updates - all while the Arduino logic waits until the moisture climbs well above the dry level before switching off. The result is a houseplant that stays perfectly hydrated, even when you are away for days.
What You'll Learn
- Interfacing analog soil-moisture sensors with the Arduino ADC and converting voltage to moisture percentage
- Controlling a 5V pump through a relay module, complete with flyback diode protection against voltage spikes
- Writing hysteresis logic in code that uses a dead-band to eliminate pump flutter and relay wear
- Driving a 16�2 LCD via an I2C backpack, displaying live readings without tying up all the Arduino pins
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 Capacitors | 5 |
| 400-pt Breadboard | 1 |
| M-M Jumper 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
From CBSE Class 11-12 students tackling practical electronics to B.Tech ECE/EEE freshmen building core automation projects, this kit bridges theory and real-world control. Smart India Hackathon participants will find a ready-to-demonstrate irrigation module, while ATL Tinkering Lab coordinators get a complete sensor-actuator project with hysteresis concepts. Even home-garden enthusiasts who just want to automate their indoor jungle will succeed with the guided build.
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 on the box to chat with our AI companion trained on this exact project. You can also WhatsApp us for human support - we'll help you debug in minutes.
How does the hysteresis prevent the pump from rapidly turning on and off?
We include a code snippet that sets a moisture threshold with a deadband. Once the pump turns on, it waits until the moisture rises well above the threshold before switching off, eliminating the relay flutter that cheap controllers suffer from.
Can I use this kit with multiple houseplants?
Yes. The kit includes two soil moisture sensors, so you can monitor two plants independently. The Arduino logic can trigger the pump only when either plant needs water, or you can add a second pump channel with simple code changes.
Does the kit work with Indian tap water?
Absolutely. The submersible pump handles standard tap water. For very hard water, a periodic vinegar rinse keeps the pump scale-free. The sensor probes have a corrosion-resistant coating, giving reliable readings for months.
Houseplant - 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