4 ms·
Making that arrangement safe probably costs more than £1.
by zrail 5y ago
Making that arrangement safe probably costs more than £1.
- mavhc 5y agoThe fact we're sending 240V AC around inside the walls for no reason is a whole other question. But an optocoupler relay is also about £1, so there's that.
- Chris2048 5y agostill need to power the esp so you'd maybe need mains AC-DC PSU.
- mavhc 5y agoI put ethernet everywhere to use PoE, 48V DC is much better suited for most things in your house these days
- Chris2048 5y agoI agree, and power negotiation is great. But things that can use it seem to be expensive. I checked, the chips are fairly cheap; but all the PoE stuff I might use aren't "one per light socket" prices. Plus I'd still like a decent mains relay board that is appropriate to put in a wall - the Shellys' are a good form for this, but I cannot see a similar wired solution (although some Sonos devices get close).
- mavhc 5y agohttps://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-sou... is probably the best option
- mavhc 5y agoAlthough I ended up buying Lilygo ESP32 POE from China because Olimex and Brexit don't mix
- Chris2048 5y agoHmm, I'm in the EU and still get hit with customs charges from Chinese items e.g. AliExpress stuff. Not sure if there would be British-made equivalent. But I'd sooner order from a company that is liable e.g. if the IoT device burns down my house.
- mavhc 5y agoAliExpress charges VAT now. If your IoT device burns the house down your circuit breaker failed, or you connected it without proper failsafe measures. Is it burning it down by being on fire itself, or by turning something on that shouldn't be?
- Chris2048 5y agoSurely a breaker can only detect over-current or short-to earth/neutral (which would also be an overcurrent I guess). If the thing just heats up and catches fire, it might not trip the breaker. I meant overheating itself, not erroneously turning things off/on.