Lawn Irrigation Controller Kit v2
Build a Self-Sufficient Lawn Irrigation Controller with ESP32, Solar Power, and Remote Access
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Bring water autonomy to your lawn or small garden with a fully solar-charged, sensor-driven irrigation system that you build yourself. This kit equips you to install three soil moisture probes, a rain sensor, and two submersible pumps, all orchestrated by an ESP32 that runs on deep sleep to conserve battery. Through WiFi and MQTT, you can monitor moisture levels and toggle pumps from anywhere, creating a responsive, off-grid watering network that reacts to real ground conditions.
What You'll Build
You'll assemble a weatherproof, standalone controller that reads soil moisture from three zones, measures ambient temperature/humidity, detects rainfall, and activates miniature pumps accordingly. The ESP32 publishes sensor data via MQTT over your home WiFi and enters deep sleep between cycles, waking only to sample or irrigate. A 6V solar panel tops up the dual 18650 battery pack, so the system can run unattended for days without direct sunlight.
What You'll Learn
- Calibrating capacitive soil moisture sensors and mapping readings to pump thresholds
- Writing ESP32 firmware with deep sleep wake-up timers, MQTT communication, and OTA updates
- Integrating solar charging, battery protection, and buck conversion for reliable field power
- Enclosing and protecting electronics from moisture while maintaining sensor accuracy
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| Soil Moisture Sensor | 3 |
| DHT22 | 1 |
| Rain Sensor | 1 |
| 5V Relay Module | 2 |
| Mini Submersible Pump | 2 |
| Silicone Tube 60cm | 1 |
| Solar Panel 6V 2W | 1 |
| TP4056 Module | 1 |
| 18650 Cell | 2 |
| 18650 Holder | 1 |
| LM2596 Buck Converter | 1 |
| 0.96in OLED | 1 |
| 1N5819 Diode | 5 |
| 1N4007 Diode | 5 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| Waterproof Enclosure | 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 purpose-built for B.Tech and M.Tech students tackling smart agriculture IoT projects, Smart India Hackathon teams prototyping sustainable farming solutions, and research scholars at IITs, NITs, VIT, or BITS designing real-world sensor networks. It also suits professional engineers and DIY makers who want a deployable lawn automation system without chasing individual components. A solid foundation in Arduino IDE, basic electronics, and soldering is assumed—you’re ready for an advanced 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 inside the box for an AI assistant that holds your hand through each wiring step and code upload. If you need a human, our WhatsApp support responds within hours.
Can I monitor soil moisture and control the pumps from my phone?
Absolutely. The firmware we provide connects to your home WiFi and publishes sensor data to an MQTT broker. You can use any MQTT client app (like MQTT Dash or IoT OnOff) to view readings and send commands to the pumps from anywhere with internet access.
How long can the system run without direct sunlight?
In deep sleep with occasional pumping, the dual 18650 cells can sustain the controller for 3–4 cloudy days. The 2W solar panel recovers a day’s typical usage with just 4–5 hours of good sunlight, keeping the battery topped up continuously.
Is the enclosure truly safe for outdoor lawn use?
The provided IP65-rated enclosure seals against rain, splashes, and sprinkler spray. We recommend mounting the box under a small roof-eave or on a stake that shades the electronics while leaving the solar panel exposed. The sensor probes are fully submersible and rated for direct soil contact.
Lawn — ESP32 + soil moisture + pump relays + WiFi MQTT. Solar charged. Deep sleep conserves battery.
What's in this kit
- ESP32 Dev Board
- Soil Moisture Sensor x3
- DHT22
- Rain Sensor
- 5V Relay Module x2
- Mini Submersible Pump x2
- Silicone Tube 60cm
- Solar Panel 6V 2W
- TP4056 Module
- 18650 Cell x2
- 18650 Holder
- LM2596 Buck Converter
- 0.96in OLED
- 1N5819 Diode x5
- 1N4007 Diode x5
- 10kΩ Resistors x10
- 100nF Caps x10
- PCB Prototype Board x2
- Waterproof Enclosure
- Soldering Iron
- Solder Wire
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