Smart Water Leak Detector Kit with ESP32 & Automatic Shutoff
Build a Whole-Home Water Leak Detection & Automatic Shutoff System with ESP32
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Water leaks under sinks, washing machines, or water heaters can destroy floors and walls before you notice. This kit lets you deploy a reliable six-node wireless sensor network that monitors critical areas 24/7. As soon as moisture touches any sensor, the central ESP32 hub instantly commands a relay to close your main water valve, preventing catastrophic flooding while you're asleep or away.
What You'll Build
You'll assemble six battery-powered Arduino Nano sensor nodes, each equipped with a water detection probe and NRF24L01 transceiver, placed under sinks, appliances, and in utility rooms. The ESP32-based hub continuously listens for alerts and, upon detection, triggers a 5V relay module wired to a solenoid valve on your main water line. The system operates off-grid using 18650 cells with TP4056 charging, giving you months of protection per charge.
What You'll Learn
- Design and deploy a multi-node NRF24L01 wireless network with robust error handling
- Power management using 18650 lithium cells, TP4056 modules, and deep sleep techniques for long battery life
- PCB soldering and assembly on prototype boards for six identical remote units
- Integrate relay-based actuators and write fail-safe logic to prevent accidental valve operation
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| Arduino Nano | 6 |
| Water Sensor | 6 |
| 5V Relay Module | 1 |
| 18650 Cell | 6 |
| TP4056 Module | 6 |
| NRF24L01 | 6 |
| 100nF Capacitor (25-pack) | 1 |
| 10k? Resistor (15-pack) | 1 |
| PCB Prototype Board | 7 |
| 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
B.Tech ECE/EEE students building IoT projects for Smart India Hackathon or final-year submissions, home automation tinkerers, and homeowners in cities like Bengaluru, Mumbai, or Delhi who want a hands-on solution to water damage. If you have soldering experience and want to master wireless sensor networks with practical power management, this kit is built for your bench.
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 your kit box to chat with the AI companion built for this exact project, or ping us on WhatsApp - we'll help you debug wiring, code, or NRF24L01 pairing.
Do I need to buy a solenoid valve separately?
Yes, the kit includes the relay module to control any standard 5V solenoid valve. You'll need to purchase a valve rated for your water pressure and pipe size, then wire it to the relay's output terminals.
Can I add more than six sensors later?
Absolutely. The NRF24L01 network can handle up to 7 nodes with the included hardware, and you can expand further by adding extra Arduino Nano boards and sensors programmed with adjusted communication addresses.
Does this system require WiFi or internet?
No, it operates as a completely local wireless network using NRF24L01 transceivers. The ESP32 hub can optionally connect to WiFi later if you want to add cloud alerts or phone notifications via your own code.
Home Automation - Six water sensors under sinks and appliances report over ESP-NOW to hub. Hub triggers valve shutoff relay.
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