Shelly plus 1 wiring doorbell - Devices - Homey Community Forum

Can someone help me wiring this correct? The bell button outside is connect to I and O. When I search for devices in shelly app, just pending connection.

Shelly support group (English Version)

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Shelly Plus 1

Shelly support group (English Version) Does anyone know if the 'L' & '1' connections are internally connected, or do I need a loop wire as shown on various internet sites

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