Interrupts The library enables the PCF8575 to generate interrupts on the PCF8575 when a key is pressed. This makes checking the keypad far more efficient as one does not need to poll the device over ...

This repository contains the source code and documentation for an Arduino-based access control system. The system utilizes a keypad and a fingerprint sensor (R305) to provide secure access to a ...

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made out of ...

In an era where homeowners frequently leave for work or education, robust security for residences is imperative. Traditional security measures, including window and door locks, present challenges such ...