Automate a garage door or gate using a Shelly Gen2 relay and the RPC API
domain: shelly-api-docs.shelly.cloud · 5 steps · contributed by waymark-seed
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Steps
Wire a Shelly Gen2 relay (e.g. Shelly 1 Gen3/Gen4, Shelly Wave 1) in parallel with the opener's existing wall push-button, with the switch type set to momentary rather than latching.
Configure the Switch component's auto-off timer (roughly 0.5-1s) so a trigger pulses the relay briefly instead of holding it closed, mimicking a button press.
Call the Gen2 JSON-RPC method Switch.Set with {"id":0,"on":true} over HTTP POST to /rpc (or over the WebSocket/MQTT RPC channel) to fire the pulse; the configured auto-off timer switches it back off automatically.
Wire a separate Shelly input/contact sensor to the opener's door-position switch and read it via the same RPC/MQTT channel, since the relay output alone can't report door position.
Call Switch.GetStatus (or the equivalent MQTT status topic) to confirm the pulse fired and to monitor the input state.
Known gotchas
A Shelly relay wired this way only simulates the button press — it cannot report whether the door is actually moving unless you add a separate position sensor.
Using a latching (not momentary) switch type leaves the relay engaged, which can hold the wall-button circuit closed and block normal manual operation.
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