RFID Based Door Lock System

Overview

This DIY project builds an RFID door lock. An Arduino Nano reads RFID cards with an RC522 reader, shows the result on an OLED and turns a servo to open the latch for authorised cards only.

How It Works

1. The RC522 reader scans an RFID card or tag brought close to it.
2. The Arduino Nano checks the card's ID against the authorised list and shows the result on the OLED.
3. If the card is authorised, the SG90 servo rotates to open the latch, then locks again.

Complete Parts List

Applications

• Home and room security - a simple card-based door lock
• Access control learning - understand how RFID authentication works
• Prototype for smart locks - a base for lockers, cupboards and cabinets

Full Build Guide

Step-by-step instructions and code for this exact project are on Project Hub.

FAQ

Do I need coding experience? No prior experience is required - this kit is built around one specific project, and the full code is freely available. See the build guide above.

What tools do I need beyond what's included? A computer with the free Arduino IDE (or ESP8266 board support, where applicable) installed to upload the code. No soldering is required for this build.

Can I reuse the parts afterward? Yes - every component in this kit is a standard, reusable part you can use in future projects, not a single-use kit.