Multi-Tenant Building Access System Kit with ESP32 + Relay
Build a Multi-Tenant Building Access System with ESP32 & RFID Relay — Full Kit
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 smart apartment building where each resident’s RFID card opens only their assigned floor, and every entry is logged with a timestamp to an SD card. The building manager views real‑time access records through a local web panel served by an ESP32 — no cloud, no subscription. This kit puts that exact system in your hands, with all hardware and the AI guidance to make it work the first time.
What You'll Build
You’ll assemble a complete access control solution that reads RFID tags, checks floor permissions stored in firmware, activates the matching relay channel to unlock a door, and writes a date‑stamped entry log to a MicroSD card. The OLED screen shows system status, the DS3231 RTC keeps accurate time, and the ESP32 hosts a simple admin web page for viewing logs — all over a local Wi‑Fi network.
What You'll Learn
- Implement multi‑level RFID access logic with floor‑specific permissions
- Interface ESP32 with SPI devices (MFRC522, MicroSD) and I2C (OLED, DS3231 RTC)
- Design relay driver circuits for high‑power electric door locks
- Build a local web server on ESP32 serving HTML/CSS and handling HTTP requests
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MFRC522 RFID | 1 |
| RFID Cards | 20 |
| 4-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 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
The kit targets engineering students (B.Tech ECE/EEE) at IIT, NIT, VIT, BITS Pilani, Smart India Hackathon teams prototyping access control, and ATL Tinkering Lab mentors demonstrating advanced embedded systems. It’s also perfect for makers who have already worked with Arduino and want to tackle a real IoT security project that combines RFID, relay control, and local web serving.
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 AI companion will help you debug step‑by‑step. If you need a human, our team on WhatsApp typically responds within 3–4 hours.
Can I extend this system to control more doors?
Yes, the 4‑channel relay already supports up to four separate locks. You can expand the access rules in the firmware to assign floors to each relay channel.
Does it work with electric strike locks?
Absolutely. The relay contacts are rated for up to 250VAC/30VDC, so you can switch any electric strike or magnetic lock as long as the power supply matches the lock’s requirements.
Is the web panel accessible from my phone?
The ESP32 creates its own Wi‑Fi access point and serves a web page accessible from any device connected to that network — no internet needed, just a browser on your phone or laptop.
RFID assigns floor-specific access. Entry log to SD. Admin web panel via ESP32 local server.
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