Automate a small office without rewiring or hardware overhauls: install Shelly i4 DC Gen4 behind existing wall switches (powered by 5-24 V DC) and use up to four inputs (SW1–SW4) with presses and multi-click actions to trigger scenes and workflows via HTTP, MQTT, webhooks, scripting, or KNXnet/IP. Coordinate responses across connected devices - like Shelly 1 Gen4 relays for lights and appliances, or Shelly BLU sensors feeding HVAC automations - so a double-press on the “Close” switch can run an “End of day” scene that shuts down loads, adjusts AC via MQTT, and sends a usage report. At the same time, real-time status in the Shelly app and a triple-press maintenance alert help cut energy costs and keep operations consistent without changing the physical controls.
