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Playing with Raspberry Pi: Door Sensor Fun | simonprickett.dev
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My door sends me emails
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Magnetic Door Alarm Sensor Switch. Connect to Raspberry Pi Pico W or Arduino. | eBay
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Hardware | Adafruit's Raspberry Pi Lesson 12. Sensing Movement | Adafruit Learning System
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Magnetic Door Alarm Sensor Switch + Cable. Connect to Raspberry Pi or Arduino. | eBay
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