This usb stick appears to require the sigma designs serial api like so many other sticks but I don’t see it mentioned anywhere. Would this be compatible with hass?
For anyone looking, found a listing which claims this is working with Hass. Found another listing saying it is a drop in replacement for the Sigma stick, which is one of the tested sticks for OpenZWave. £6 its a bargain! (they also have 2 zwave door sensors for about £11).
Confirmed seen by hass. Cheap zwave stick!
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I have one from the same seller. It works fine on Home Assistant Docker image on my Synology 916+ and using the all in one installer on my Raspberry Pi 3.
The same seller has door sensors as well which while a little large seem to work well.
I’ve ordered more 
I may order a few more just to have sitting around in case…
I noticed a couple of things on the pi. It needs the whole machine to be restarted for python-openzwave to see the proper manufacturer details and add nodes properly. So insert stick, let it complete its discovery of the stick, then reboot.
It then comes up as a sigma UZB.
I also bought three door sensors and got stuck until I realised that I needed to restart home assistant to remove my failed initial node addition, then add node again with the stick picked up properly.
I then hid everything but the binary sensor. Now I need some cheap motion or multi sensors, but for around £25 for stick and three zwave plus door sensors I’m happy!
I bought a door sensor, just to see. It seems to work -ok- with my z-wave network (which consists only of a Aeotec ZW090 and a SmartThings hub - not too much there yet!).
But I am finding that it reports “open” for hours on end, when the door is closed. I think the issue is that it is not sending two updates if the door open and then closes quickly. Though it may be that the sensor is too far away from a hub.
Have you observed similar behaviour?
Nope. Mine seem to work as they should.
Hmm - time to look for a cheap z-wave extender in that case.
The door sensors are z wave plus so should extend the network themselves in theory. I’m using mine with the USB they also sell and it’s perfect with hass. I do use the auto installed python openzwave not the separately installed one if that helps.
On reflection I think my problem must be something else. I sometimes don’t get a second red led flash if I open/close quickly. Perhaps there is some configuration item I have mistakenly changed …
I use the auto installed openzwave too.
Maybe the wake up time?or another magnet upsetting the Reed switch?
Oooh - another magnet, there’s a thought!
It’s mounted next to a now unused SmartThings sensor. I wonder if that’s the issue. Thanks for the idea!
Do you have a link to the door sensors, I had a look and saw some for £8.99 but that was from another seller, and the one I found on the USB stick seller were £29.99!? Just want to make sure I get the right ones that you confirmed work OK!
Thank you in advance @nikc0069
I saw these on Amazon uk for £8.99 also.
Good alternative if you have prime:
Zwave stuff really seems to be dropping in price recently…
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They are out of stock on eBay now. Same ones linked in amazon above however.
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I managed to get one at £7.49 from ebay, and have had two from Amazon at £8.99 delivered today (Wed, ordered Sat). Just installed them.
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Perfect, thank you all!
has anyone experienced issues with the £8.99 ones from amazon> i spotted these the other week, got one and worked ok initially but noticed that if left open for a length of time, it would randomly report as closed for no apparent reason, making it entirely unreliable…anyone else had this?
Not got the Amazon ones but the eBay ones haven’t missed a beat.
I’m finding reliability is patchy.
Though I don’t know whether this is because of the switch hardware or the distance to the nearest z-wave device. I am planning on getting a z-wave extender to see if that improves things.