Make a dumb doorbell smart with Shelly 1 - Share your Projects! - Home Assistant Community

Where you already able to connect it? Otherwise you can connect the cables according to how they are connected to your transformer. See this post 34 for more details. You should be able to use the way Rubueno describes the wiring.

Make a dumb doorbell smart with Shelly 1 - Share your Projects

31 DIY Alexa Connected Smart Doorbell

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