I know its not currently in your line of products but there are a lot of things I want to control that are not necessarily 110/220V. For instance my fireplace. I heavily modified a TP-Link Kasa smart

It would be great if TP Link were to make a device that acts as a relay with normally on and normally off connections that could switch ac up to 250v and dc up to 30 v 5 amps with both continuous and