Shelly 1 is a miniature WiFi switch with firmware for control within the Apple HomeKit, which, thanks to its size, can easily be installed under a switch or socket in a deeper enclosure.
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Reset HomeKit Compatible Shelly 1 by Homekit BG
Troy Hunt: Controlling Smart Lights Using Dumb Switches with Shelly and Home Assistant
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Intercom Buzzer wiring with Shelly Plus 1
Compatiblidad del Shelly con Apple HomeKit: firmwares - Carlos Sahuquillo
Shelly 1 not recognized in Apple Home App? · Issue #91 · mongoose-os-apps/ shelly-homekit · GitHub
Shelly Qubino Wave 1 - relay switch 1x 16A (Z-Wave) - Shelly Wave 1
Shelly Plus 1 - Relay Switch 12V/24V-60V DC / 240VAC WiFi 16A - Android / iOS Botland - Robotic Shop