Roof Leak Detection Kit with ESP32 + Ultrasonic
ESP32 Roof Leak Detection Kit: Ultrasonic Tank Monitor & Control
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform your building’s rainwater harvesting system into a smart, automated maintenance hub. This kit guides you through building a roof leak detection and rainwater management controller that continuously monitors tank levels with dual ultrasonic sensors, diverts the first flush of contaminated water, controls a pump to switch between mains and backup feeds, and logs every rainfall event — all orchestrated by an ESP32 microcontroller. Designed for real-world building maintenance, it’s a working solution for apartments, farmhouses, and commercial structures.
What You'll Build
You’ll assemble a weatherproof unit that mounts on your roof, constantly measuring water depth in the collection tank using HC-SR04 sensors. When rain begins, the system engages a relay‑driven first‑flush diverter, opening a purge valve for a set duration before channeling clean water to the tank. As levels change, it automates a pump bypass to switch from mains supply to stored rainwater, while the OLED shows live depth, date, and valve status. All events — rain start time, diverter cycles, pump changes — are timestamped with a DS3231 RTC and stored on microSD for long‑term analysis.
What You'll Learn
- Program an ESP32 to simultaneously manage multiple sensors, a real‑time clock, an OLED display, and relay outputs over I2C, GPIO, and SPI buses
- Calibrate ultrasonic sensors for precise ranging outdoors, implementing median filters and debris‑rejection algorithms
- Design a deterministic state machine for rainwater logic: first‑flush diversion, pump bypass control, and event logging with fail‑safe defaults
- Integrate an RTC and microSD module to create a robust datalogger that maintains data integrity across power cycles and resets
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| HC-SR04 | 2 |
| Rain Sensor | 1 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 18650 Cell | 2 |
| TP4056 Module | 1 |
| 100nF Caps | 10 |
| 10kΩ Resistors | 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 advanced kit suits B.Tech ECE and civil/environmental engineering students crafting final‑year projects on smart water management, facilities professionals upgrading apartment or commercial rainwater systems, and IoT enthusiasts building robust home automation. It aligns with Smart India Hackathon themes and is a natural fit for IIT, NIT, and BITS Pilani project labs where real‑world monitoring must endure outdoor conditions.
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 to access an AI assistant that knows every connection and logic flow of this kit. You can also send a WhatsApp message with a photo of your setup, and our support team will guide you through the specific step.
How does first-flush diversion work in this kit?
The rain sensor triggers a relay that opens a purge valve for a pre‑programmed duration (e.g., 10 minutes), discarding the initial contaminated runoff. Once the timer expires, the valve closes and clean water flows to the tank.
Can I upgrade the system to send data to the cloud?
Absolutely. The ESP32 has built‑in WiFi. After completing the base build, you can extend the firmware to push logs to platforms like Blynk or AWS IoT, using the microSD as backup storage.
What happens if both 18650 cells drain during an extended rain event?
The TP4056 module charges the cells via a USB supply, and the buck converter ensures stable 5V output. If batteries drop critically low, the ESP32 saves the current state to microSD and enters deep sleep. We recommend a small solar panel or permanent USB power for continuous operation.
Building Maintenance — Ultrasonic level sensor monitors tank. Diverts first-flush, controls pump to mains-backup valve and logs rain events.
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.
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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