Arduino Door Lock with Smartphone Flashlight Login (Li-Fi project)

Published at : 23 Dec 2025

This project is sponsored by PCBWAY https://www.pcbway.com/?from=MirkoP
There are many different arduino door lock projects, where the access method is using a keyboard, RFID card, biometric device, WiFi, Bluetooth, etc... This time I will describe to you a project where access is made possible in a very unusual way with the help of a flashlight from a smartphone. I got the idea from Himanshu Sharma's Li-Fi project from where I also used the .APK application, and adapted the Arduino code for this particular project.
This is actually not a real Li-Fi communication, it's just a simple light beam with a certain duration, which duration is related to a given operation performed by the arduino.

Detailed instructions, schematic, and code at:
https://www.hackster.io/mircemk/arduino-door-lock-with-smartphone-flashlight-login-75d9a3

Chaptes:
0:05 Short Demo
2:00 Description
2:56 Parts
4:47 Demonstration
8:07 Building

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https://www.youtube.com/c/MirkoPavleskiMK/videos

by mircemk
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#arduino #Li-Fi #electronics #DIY #pcbway