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Case for Raspberry Pi Zero, HC-SR-04 and relay
by gerryw
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I needed this as a garage door opener: A case for a Raspberry Pi Zero W, an SR-HC-04 ultrasound sensor and a relais.
The Raspi runs a nodejs web server, measures the distance to the garage door edge (to tell if it's open or closed) and operates the relais to open or close the door when called from a remote app.
The Raspi runs a nodejs web server, measures the distance to the garage door edge (to tell if it's open or closed) and operates the relais to open or close the door when called from a remote app.
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