I can’t say but I don’t see why not. I’m in the US so those are not that common. I have mine set up with a decora rocker switch set up where flipping it either direction toggles the light on or off. My Zwave switch looks like a decora switch but it’s just a push button in practice.
Who cares? Based on past experience OH is down for about 2 hours over the course of a year. And that’s for upgrades and power outages. In five years I’ve experienced exactly one case where I was away, came home, and I couldn’t open the Garage Door because something went down. But I had the remote that came with the garage handy and was able to get into the garage just fine. It was just a little less convenient.
That’s why I keep asking, is adding all this redundancy and fail over and such worth it?
But, if you are using Zigbee or Zwave that scenario is possible. You can configure the devices so that the motion sensor controls the light or the switch directly without going through openHAB.
Of course. That’s all part of the failing gracefully. When OH is down, the device need to perform at least at a basic level independently. When OH is down, you can control the lights with the wall switches. When OH is down, you can control the HVAC with the thermostat on the wall. That’s what failing gracefully means. When OH goes down, your stuff behaves more like an escalator than an elevator. It may not be as convenient when OH is down, but it’s not completely unusable.
You have to choose. Is it more important to you that your home automation perform 100% of all automation functions at all times regardless of failure, or do you allow some of the automation functions not work during those brief periods of down time. If you want the former, you probably don’t want to use openHAB anyway as a central controller and instead push all the behaviors and interactions out to the end devices, letting them talk to each other without central control. If the former, modern hardware is reliable enough when only minor precautions are taken.
Do you have to be able to control those roller shutters during those brief periods when openHAB or your network is down? I think the crux of the problem is your home automation does not have to be fully functional at all times and in all ways. Stuff goes wrong. When stuff goes wrong, you need some sort of backup for the important stuff. Stuff like lighting, door entry, HVAC. you know, health and safety issues. Does it really matter if you can’t open or close the blinds for an hour because openHAB crashed for some reason?
Honestly, there are aspects of the openHAB architecture and overall approach that makes it unsuitable for almost all of those more serious applications. There is no real-time processing, no transactions, a lot of times there isn’t even confirmations and acks. There is no determinism. You can’t even guarantee the order of processing for events that occur too close together.
If you need the kind of reliability and deterministic behavior, you need to go with a system designed from the ground up to do it. openHAB is not it.