Sonoff ZBMINIL2 Wiring Guide: No Neutral, Keep the Existing Wall Switch
Updated October 2026: added the direct answer, a terminal table, the neutral question, switch types and pairing, a troubleshooting section and the agent handoff block. The video and the original diagram are unchanged. The Sonoff ZBMINIL2 (Amazon) is a Zigbee relay that fits behind a UK light switch and needs no neutral at the switch. Wire it in series with the switched live and connect the existing rocker switch to S1 and S2, and the light works from the wall switch, from Home Assistant, or both. The whole job is four terminals, and the only trap is that the blue wire in the switch drop is a live, not a neutral. ...