Shelly 1 Mini Gen4 and Gen3 wiring diagram

Every job, terminal by terminal

The Shelly 1 Mini Gen3 is wired the same way as the Shelly 1 Mini Gen4.

1. Switch a light or appliance

   One circuit, switched through O

   Mains comes in on L and N, a short bridge feeds the relay input, and O carries the switched active out to the light. The existing wall switch lands on SW, so the physical switch keeps working alongside the app.

   Terminals for switch a light or appliance on the Shelly 1 Mini Gen4

   Terminal	What it does here
   L	230 V active in
   N	Neutral in
   I	Relay feed, bridged from L
   O	Switched active out to the light or appliance
   SW	Existing wall switch

   Supply: 230 V~ 50 Hz

2. Pulse a garage door opener

   Dry contact to the opener's trigger input

   The opener only needs a brief contact closure across its trigger terminals, so O and I run as a dry contact, with no mains passing through them. L and N just power the relay. The push button on SW carries mains, so use a mains-rated button. In the Shelly app, turn on Auto off for the output with a short delay.

   Terminals for pulse a garage door opener on the Shelly 1 Mini Gen4

   Terminal	What it does here
   O	Dry contact, one opener trigger terminal
   I	Dry contact, the other trigger terminal
   SW	Optional push button, mains-rated
   L	230 V active in, powers the relay only
   N	Neutral in

   Supply: 230 V~ 50 Hz