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Pzsmocn Collision Sensor/Micro Snap Switch/Micro Limit Switch Module Compatible with Raspberry Pi and Arduino Board. for Smart Homes, Offices, 3D Printer and Teaching Interact with Robots.: Amazon.com: Industrial & Scientific
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wiring - Controlling Switches from both Raspberry Pi relay & Manual [Home Automation] - Raspberry Pi Stack Exchange
How to operate a bulb/fan both manually (with a traditional switch) and through a mobile app (or automatically based on a sensor) using a Raspberry Pi? Can I connect all the devices
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