Review on SHELLY 1 One Relay Switch: Ultimate Wireless WiFi Home 🏡 Automation with iOS and Android App (4 Pack) - UL Certified by Mike Gruwell

A great way to 'seamlessly' intelligently control existing lights with existing switches. In my case I used it for a bathroom fan to add an automatic timeout feature. I like the "cloudless" mode when it's not talking outside of my home network. I connected it to HomeAssistant via MQTT. The only problem is that the screw connections are _very_ close together - make sure to cut the wires to the right length and push them all the way in so the insulation is inside the case. It may be necessary to solder the stranded wire to ensure no hidden single wire slips out and shorts out.