Closed-Loop Insulin Reminder System Kit with ESP32 + Motor
Closed-Loop Insulin Reminder System Kit — Build a Personalized Alert Device Using ESP32 and Biometrics
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
For anyone managing diabetes, timing insulin doses with meals and glucose fluctuations can be life-critical. This project lets you construct a wearable device that fuses optical SpO2 and pulse data with a continuous glucose monitor analog signal, then uses an algorithm to vibrate at the right moment. It’s not a medical device, but a powerful learning tool for closed-loop health systems.
What You'll Build
You’ll create a belt-worn prototype that reads SpO2 and heart rate from a finger clip, accepts an analog glucose proxy from a CGM simulator or actual sensor, and logs all data to a MicroSD card. The ESP32 processes this in real time, computes an optimal reminder window, and triggers a silent vibration motor. An OLED screen displays current vitals and the next reminder time.
What You'll Learn
- Fusing optical SpO2 with analog glucose inputs to derive a metabolic state
- Writing interrupt-driven firmware for ESP32 to handle multiple sensor streams
- Logging time-stamped biosignals to SD card via DS3231 RTC with FAT32
- Designing a battery-powered wearable circuit with TP4056 charging and buck regulation
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MAX30102 | 1 |
| AD8232 ECG Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| Coin Vibration Motor | 1 |
| 0.96in OLED | 1 |
| TP4056 Module | 1 |
| 3.7V LiPo 1000mAh | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 10 |
| 4.7kΩ Resistors | 5 |
| PCB Prototype Board | 3 |
| 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 advanced kit suits B.Tech ECE/EEE final-year students working on biomedical capstone projects, Smart India Hackathon teams building health IoT solutions, and experienced makers prototyping wearable diabetes tech. If you’ve built basic Arduino projects and want to tackle sensor fusion with real-time scheduling, this is your next challenge.
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?
The QR code on the box links to a dedicated AI companion trained on this exact project. You can also reach our support team via WhatsApp for troubleshooting.
Can this device provide actual insulin dosing recommendations?
No, this is an educational project only. It demonstrates closed-loop logic but is not intended for medical use.
Do I need a real CGM sensor to test the system?
The kit accepts a 0-3.3V analog input from any source; you can simulate a glucose signal with a potentiometer for testing before connecting an actual CGM.
What programming environment is needed?
You'll need the Arduino IDE with ESP32 board support and the Adafruit MAX30102, RTClib, and SD libraries. Full setup steps are in the companion guide.
MAX30102 SpO2 + CGM analog input correlate glucose proxy with pulse to compute insulin reminder schedule.
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