ESP32 Biometric Access Terminal Kit: Fingerprint, RFID, PIN
Fingerprint, RFID & PIN with Secure Cloud Logging
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Most access control systems rely on a single factor-a card or a PIN. This kit lets you build a hardened, three-factor terminal that combines fingerprint biometrics, RFID card scanning, and a 4x4 keypad PIN. Each authentication attempt is logged in real-time to the cloud via MQTT, giving you an audit trail you can access from anywhere. Ideal for securing server rooms, research labs, or office entrances with zero recurring subscription fees.
What You'll Build
A fully enclosed, wall-mountable access terminal with a clear OLED display. Users present a fingerprint, scan an RFID badge, and enter a PIN-all three must match a registered profile. Upon successful authentication, the solenoid lock releases. All events, including failed attempts, are timestamped with the DS3231 RTC and logged to a cloud dashboard over WiFi, giving you a complete digital audit trail.
What You'll Learn
- Enrolling and verifying fingerprints with the R307 optical sensor using ESP32
- Implementing RFID authentication with MFRC522 and storing tags in firmware
- Designing a triple-factor state machine that requires all credentials in sequence
- Publishing authenticated access events to an MQTT broker over ESP32 WiFi and logging to MicroSD as backup
- Integrating a relay-driven solenoid lock with a flyback diode and buck converter for stable 5V operation
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| R307 Fingerprint Sensor | 1 |
| MFRC522 RFID | 1 |
| 4x4 Keypad | 1 |
| 5V Solenoid Lock | 1 |
| 5V Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 1N4007 Diode | 5 |
| 10k? Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 3 |
| Enclosure Box | 1 |
| 12V Adapter | 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
Engineers and security-conscious makers who need reliable access control without cloud vendor lock-in. If you are a B.Tech graduate specializing in ECE/EEE developing a Smart India Hackathon prototype, an ATL mentor building a lab security demo, or a professional at an IIT/NIT/VIT/BITS lab seeking a custom biometric system, this kit provides every component pre-tested for a secure, field-deployable terminal. No hunting through multiple electronics shops online or waiting weeks for backordered sensors.
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 chat with the AI companion trained on this kit's schematic and code; you can also send a photo via WhatsApp for human troubleshooting within 4 hours.
How does the triple-factor sequence work?
The system requires fingerprint first, then RFID scan, then PIN entry-all must match a pre-enrolled profile. You can reconfigure the order and acceptance window in the firmware.
Can I log events to a private server instead of a public cloud?
Yes, the ESP32 posts to any MQTT broker you specify; you can run Mosquitto on a local Raspberry Pi or your own VPS.
What if the internet goes down?
The terminal continues to operate offline, caching events on the MicroSD card. Once WiFi reconnects, it syncs the log to the cloud broker.
Fingerprint + RFID + PIN triple-factor authentication required. All events cloud-logged via ESP32 MQTT over WiFi.
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