The Ultimate Smart Door Lock Security System

About the project

Gain access by presenting an RFID keyfob, entering your PIN on the touchscreen and then entering a one-time code sent by SMS.

Connectivity  Contest WinnerConnectivity contest winner

Project info

Items used in this project

Hardware components

Raspberry Pi touchscreen (4inch RPi LCD (A)) Raspberry Pi touchscreen (4inch RPi LCD (A)) x 1
USB RFID Reader & Tags USB RFID Reader & Tags x 1
5V Single Channel Relay Switch 5V Single Channel Relay Switch x 1
Electric Strike / Lock Release Electric Strike / Lock Release x 1
GPIO Expansion Board GPIO Expansion Board x 1
Choc Blocks Choc Blocks x 1
Arduino Jumper Cables M/M 65 pack Arduino Jumper Cables M/M 65 pack x 1
ATX breakout board bench power supply ATX breakout board bench power supply x 1
Raspberry Pi 3 (RPi3) Board Raspberry Pi 3 (RPi3) Board x 1

View all

Software apps and online services

Raspbian Raspbian
Twilio Twilio
Python Python

Hand tools and fabrication machines

Multimeter Multimeter x 1
Precision Screwdriver Set Precision Screwdriver Set x 1
Wire Strippers / Cutters / Crimpers Wire Strippers / Cutters / Crimpers x 1
Soldering Iron Soldering Iron x 1
Glue Gun Glue Gun x 1
Cordless Drill Cordless Drill x 1
Jigsaw Jigsaw x 1


In this video Paul shows you how to build the ultimate door lock system, effectively turning your office or bedroom into a high-security vault! To be granted access and open the door, visitors will require not just two but THREE factors of authentication; an RFID keyfob, their unique PIN, and a one-time passcode sent to their phone via SMS. It's all built using readily-available low-cost components built around a Raspberry Pi.

I built the project because I love building things and combining software engineering with hardware that does something in the "real world". I'm interested in security and how two-factor authentication has augmented the level of security offered by systems which previously relied on password only, so I wanted to push the boundaries and see what as possible with a third requirement too.


GitHub Repo


Photo of paulfp


Paul is a technology enthusiast, geek, writer, presenter, video producer, YouTuber, drummer, husband, and father to three children, including twins.


Leave your feedback...