Hydroponics Nutrient Monitor Kit with ESP32 + Sensor
Hydroponics Nutrient Monitor Kit with ESP32: Solar-Powered Plant Tag That Alerts You When to Water
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine a tiny, weatherproof tag that sits quietly in your hydroponic grow bed and whispers to your phone exactly when your plants are thirsty. That’s what you’ll create with this kit. Using a solar-powered ESP32-C3 and a soil moisture sensor, you build a Bluetooth Low Energy (BLE) alert system that broadcasts watering needs without Wi-Fi. No more overwatering, no more wilted leaves — just a simple notification on your smartphone the moment the growing medium dries out.
What You'll Build
You’ll assemble a compact plant tag that slides into coco coir, rockwool, or perlite. The ESP32-C3 continuously reads the moisture sensor and, when the level drops below a preset threshold, it sends BLE advertisement packets. Your phone picks up the signal via any BLE scanner app, giving you a direct alert. A 6V solar panel tops up an 18650 battery through a TP4056 charging module, so the tag runs for months without a charge. The whole circuit lives inside an IP65‑rated enclosure — safe from water splashes and humidity.
What You'll Learn
- How to solder through‑hole components and battery connections safely
- Programming the ESP32‑C3 in Arduino IDE, including BLE advertising
- Reading analog soil moisture sensors and mapping values to watering alerts
- Setting up a solar charging circuit with the TP4056 and 18650 cell
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-C3 Super Mini | 1 |
| Soil Moisture Sensor | 1 |
| Solar Panel 6V 1W | 1 |
| TP4056 Module | 1 |
| 18650 Cell | 1 |
| 10kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| IP65 Plant Tag Box | 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 tailor-made for ATL Tinkering Lab students, CBSE/ICSE Class 6‑10 science fair participants, and parent‑child weekend projects. The hands‑on soldering and coding introduce real IoT concepts at a beginner level, while the immediate real‑world use — keeping a hydroponic plant healthy — makes every step feel meaningful. Even a 10‑year‑old with adult guidance can finish a working tag in an afternoon.
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 open your AI companion — it knows this exact kit and can walk you through each step. If you still need help, drop us a WhatsApp message and a real human will jump in.
Do I need to solder the components?
Yes, basic soldering is required. The kit includes a soldering iron and solder wire, along with detailed visual instructions, making it a perfect first soldering project.
Is programming experience required?
Not at all. The AI companion supplies the complete Arduino code, ready to upload to the ESP32‑C3. You just copy, paste, and click upload — you’ll learn how it works as you go.
Does this work with any hydroponic setup?
The moisture sensor performs well in soilless media like coco coir, rockwool, and perlite, which covers most home hydroponic systems. It also works in potting soil if you later decide to use it in a traditional planter.
Hydroponics — Solar powered ESP32-C3 in a plant tag reads soil moisture and BLE broadcasts watering need alert.
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