Magnetic Door Alarm Sensor Switch + Cable. Connect to Raspberry Pi or Arduino.
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Magnetic Door Alarm Sensor Switch. Connect to Raspberry Pi Pico W or Arduino. | eBay
Smart door automation — The MagPi magazine
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Magnetic contact switch (door sensor)
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Is something like this possible? A raspberry pi door lock checker : r/RASPBERRY_PI_PROJECTS
Hardware | Adafruit's Raspberry Pi Lesson 12. Sensing Movement | Adafruit Learning System
RaspberryPi powered door sensor plays sound effects - Raspberry Pi Pod and micro:bit base
Raspberry Pi Controlled Garage Door & Sensor (complete instructions) - YouTube
How to Send Push Notifications from Raspberry Pi
gpio - How to connect 2-wire door sensor to raspberry pi - Raspberry Pi Stack Exchange
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