Aquarium Temperature Monitor Kit with ESP32 + Relay
ESP32 Aquarium Temperature Monitor Kit: Learn Cheapest Tariff Windows & Automate Heater Relay
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
If you’re tired of guessing how much your aquarium heater actually costs each month, this kit builds a controller that learns your area’s electricity tariff windows — peak, off-peak, and flat rates — and runs the heating relay only when it is cheapest to do so. Using dual waterproof temperature sensors, precise current monitoring, and a real‑time clock, the system logs performance data to microSD so you can refine the schedule and never pay more than necessary while keeping your fish safe.
What You'll Build
You’ll assemble a compact control unit that reads water temperature at two depths with DS18B20 sensors, tracks heater AC current draw via an ACS712, and logs energy consumption against time from the DS3231 RTC. The OLED displays live temperature, current, and next scheduled relay activation. With the AI companion, you’ll program the ESP32 to compare tariff slots against heating demand and automatically switch the relay to the lowest‑rate window — turning your aquarium into a self‑optimizing energy system.
What You'll Learn
- Calibrate and deploy waterproof DS18B20 sensors for ±0.5°C repeatability in submerged conditions
- Measure RMS current with an ACS712 20A module and convert readings into accurate power draw
- Implement a DS3231 RTC‑driven scheduler that triggers the relay only within user‑defined tariff windows
- Log multi‑sensor data to a microSD card, format CSV files, and review historical patterns for cost refinement
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| DS18B20 Waterproof | 2 |
| ACS712 20A | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 5V Relay Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 10 |
| 4.7kΩ Resistors | 5 |
| 10kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| Enclosure 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 designed for engineering students (B.Tech ECE/EEE) building final‑year IoT energy projects, hackathon participants at the Smart India Hackathon tackling sustainability themes, and home‑automation makers eager to integrate real‑world sensor data with intelligent control. Basic familiarity with Arduino or ESP32 and soldering is all you need; the advanced logic is scaffolded by the AI companion.
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 open the AI companion. It walks through wiring, code upload, and tariff schedule configuration. You can also WhatsApp us directly — we reply between 10 AM and 8 PM IST.
How does the kit decide the cheapest time to run the heater?
The companion AI helps you enter your electricity provider’s peak, off‑peak, and flat rates into the ESP32 firmware. The board logs temperature vs. current every few minutes, then over several days correlates the data with tariff slots. It picks the schedule that maintains your set temperature with the lowest cumulative power cost.
Can I monitor the tank remotely?
Yes — the ESP32 has Wi‑Fi; the AI companion provides an optional code module to push data to a free cloud dashboard or create a local web interface so you can check temperatures and logs from your phone.
Do I really need to solder the board?
Yes. The kit includes a soldering iron and solder wire for assembling the components on the prototype board. A basic soldering guide is built into the AI companion, and all joint pads are generously sized to make it straightforward.
Aquarium — DS18B20 water temp + ACS712 current + RTC schedule learns cheapest tariff window and controls heater relay optimally.
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