A servo motor is connected to control the door's opening and closing, while a buzzer is used to generate an audible alarm. The Arduino receives signals from the face mask detection system to determine ...

This project aims to give you a modern and complete IoT door alarm to deploy on your esp32. It has been built with esp32-arduino framework. It is based on the Magnetic Hall effect, which is why a ...

Alarm systems are fitted on trains for passengers to contact staff, open doors or stop trains More ... In the year to August 2019 passenger communication, door and emergency alarms were activated ...