OTP Based Door Lock Using Arduino | SIM800L

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In this video, we will guide you through the process of creating an OTP (One-Time Password) based door lock system using Arduino and various components like I2C 16x2 LCD, relay, 4x4 keypad, and GSM SIM800L module. The system will enhance the security of your doors by requiring a unique password each time someone wants to gain access.

Component List
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Arduino UNO Board
16x2 LCD Display
I2C Module
4x4 Keypad
Sim800l GSM Module
LM2596 Step down converter
5v 1channel relay module
Push Button
Zero PCB
Wire
USB Cable
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