22 lines
1.1 KiB
Markdown
22 lines
1.1 KiB
Markdown
# door-alarm
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This is a simple, home-made door alarm based on ultrasound sensor (SR04) distance measurements
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The peripheral device is powered by a Raspberry Pi Pico W, with the following diagram
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It works by pointing the ultrasound sensor at the door from the side, the device being placed on the doorframe. While the door is closed, the distance will be 1-5 cm, when the door opens, the side of the door will move, and the distance will be greater the more you open the door, at a 90 degree open, the distance will be the width of the door
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After getting the distance and comparing it to the threshold, the peripheral sends updates to the server, which may or may not send a notification to gotify based on whether the door is locked (on the server)
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This is how it actually looks like on the door frame:
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### License
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This project is licensed under the [GNU GPLv3](LICENSE) license
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