I'd second the want for ethernet with PoE, with slots for rechargeable AA batteries for power outages. I bet more than 10% of fire alarms currently installed in the USA have a dead battery.
I completely forgot about PoE. I have zero devices that support it since it seems to be so rare. I'd go out and buy a nice switch if it had more support. I really don't like this trend of low power IoT devices that only support Wi-Fi when Ethernet+PoE is perfect for them. I'm all for having Wi-Fi built in, just not the only way to connect.
BTW, mikrotik is a very nice platform for geeks, en attendant Godot (a high load open source linux based router distro. Yes I know of openwrt, but that's kind of limited hw, hackish and prosumer? )
I'll third the desire. We've been turning the WiFi off at night, and virtually every AP we've had has had issues. So I'd much rather use ethernet for something as critical as security, due to past WiFi issues.
I don't have WPS on my router (How else do you input the SSID/Password?) and I turn Wi-Fi off when I'm not in my house so this product would be a real hassle to setup/use.
The device is configured wirelessly using the smartphone app. It'll queue the events and measurements if your wifi is down, but I see that it will be hard for you to use if you always turn your wifi off when you are away.
Is turning the wifi off when you leave a security concern or a power thing, like you're running off the grid? I'm just curious, as if it's the former and I had the same concern I'd just limit access to specific MAC addresses and make the access point invisible.