![Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/51LACYzhtYL.jpg)
Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics
![Door/Window Alarm GPIO Project Kit for Raspberry Pi. Includes breadboard, magnetic reed switch door sensor, three metres of bell wire and components. Includes PDF manual & example scripts. - Newegg.com Door/Window Alarm GPIO Project Kit for Raspberry Pi. Includes breadboard, magnetic reed switch door sensor, three metres of bell wire and components. Includes PDF manual & example scripts. - Newegg.com](https://c1.neweggimages.com/ProductImage/A9DCD2204250TM6H5EE.jpg)
Door/Window Alarm GPIO Project Kit for Raspberry Pi. Includes breadboard, magnetic reed switch door sensor, three metres of bell wire and components. Includes PDF manual & example scripts. - Newegg.com
![Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/8128AiL75VL.jpg)
Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics
![Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/618-oOqNs7L.jpg)
Amazon.com: DIYables 4pcs Door Sensor Magnetic Switch for Arduino, ESP32, ESP8266, Raspberry Pi : Electronics
![Magnetic contact switch (door sensor) : ID 375 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits Magnetic contact switch (door sensor) : ID 375 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-blog.adafruit.com/uploads/2021/06/I375-01.jpg)