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Add Bluetooth to Arduino and ESP8266 easily using RYB2340 module

I’ve been testing out the RYB2340 Bluetooth module, and it’s honestly one of the simplest ways I’ve found to add wireless ...
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IIMSTC Mini Project_01 – "Password-Based Door Lock System" using Arduino, Keypad, LCD, and Servo Motor. SDG Goal: 8 – Decent Work and Economic Growth.

This project implements a secure password-based door locking system using Arduino. The system allows users to enter a 4-digit password using a 4x4 keypad. If the password is correct, the door unlocks ...