I am playing with home automation, and one of the reasons i’m only using zigbee devices is that they have no outside network access. I have two wifi thermostats that I bought before, and one of these days I’m going to have to set up a firewall of some kind to block them from outside access.

I'm sad I went for a WiFi based solution many years back (Tado). They say cloud costs are getting too high and are suddenly super aggressive in limiting API usage. Give me a fully working local API then, you twats.

I haven't found a good local-only or ZigBee based system that allows precise room control that controls the central heater efficiently based on demand. I could get a bunch of ZigBee radiator knobs, but then I'd have to do a lot of programming/automation to get a good system as a whole. I have to say that Tado does that brilliantly (that's why I chose them in the first place)

A selling point of Matter is that objects can operate without net access. I guess we'll find out whether the spec ensures the guarantees.

The wifi devices are cheaper IME, so I created a IOT VLAN that does not have internet access, nor access to my normal network unless it was initiated from the trusted side.