this post was submitted on 08 Nov 2024
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Zwave stuff are way overpriced, even comparing to the wifi or zigbee quivalent.
As an examble I get good quality (aka not an unknown chineese brand) Zigbee smart object for 2 to 5 times lower price than what a Zwave equivalent.
Same goes for wifi one, which are roughly the same price as the Zigbee stuff.
The only good aspect of Zwave was the security protocol that was more robust than the Zigbee equivalent (albeit Zigbee 3.0 closed the gap) and more standardized endpoints. Matter objective is to get those two to surpass their ZWave equivalent.
Unfortunately my gateway (which is compatible with both Zigbee 3.0 and ZWave btw) is still waiting for its Matter/Thread upgrade, so I can't try it yet, but compairing my Zwave objects with my Zigbee ones, I see no point of buying the former over the later.
I once owned a bunch of WiFi connected devices. One day I inspected my router logs and found out that they were all making calls to a bunch of services that weren't the vendor - things like Google, and Facebook.
WiFi connected devices require connecting to a router; in most homes, this is going to be one that's also connected to the internet - most people aren't going to buy a second router just for their smart home, or set up a disconnected second LAN on their one router. And nearly all of these devices come with an app, which talks to the device through an external service (I'm looking at you, Honeywell, and you, Rainbird). This is a privacy shit-show. WiFi is a terrible option for smart home devices.
ZigBee, well, I haven't had any luck with it - pairing problems which are certainly just a learning curve in my part and not an issue with the protocol. I chose ZWave myself because I read about the size and range limitations of ZigBee technology, versus ZWave, but honestly I could have gone either way. Back then, there was no appreciable price difference in devices. Most hubs support both, though, and I can't see why I wouldn't mix them (other than I need to figure out how to get ZigBee to work).
In any case, low-power BT, ZigBee, or Zwave are all options, whereas I will not allow more WiFi smart devices in my house. I'm stuck with Honeywell and Rainbird, for... reasons... but that's it. I don't need to be poking more holes in my LAN security.
I feel your point regarding the WiFi devices and that they shouldn't be recommended to casual users. But if you just set up an isolated VLAN with its own SSID and use e.g. homeassistant running locally to orchestrate them, then what's the harm? If your goal is privacy, you need some kind of local "hub" anyway, and to me it makes way more sense to be able to place that machine anywhere, regardless of e.g. bluetooth reception to your smart home devices (since that is taken care of via the additional SSID on your WAPs).
I had some difficulties too with Zigbee pairing, that's one of the shortcomings that Matter fixes with their QR Code pairing. On my case it was just about understanding that you have to put both the device and the coordinator in pairing mode for the "interview" to happen. And that is has to be close to any device of the target network that isn't battery powered (they can do the interview on the coordinator behalf).
I stopped using WiFi devices for the same reason, but found out about Tasmota, an open-source firmware for ESP devices. It requires a local coordinator, but never send anything to Google and the likes. It can be hard to flash, but some vendor, like Nous, offers pre-flashed devices. Some of them are also Matter compatible (if it has recent hardware as old ESP device has too little rom to handle the Matter code).
I would argue you get what you pay for in terms of interoperability and reliability, but I can imagine people willing to trade some of that for a lower price.
Interoperability comes from standardization, which Zigbee sorely lacked. But actors like Tuya or Leroy Merlin built their own standard over Zigbee, which means anything that has "works with Tuya" will work with any Tuya coordinator of any brand (same for Leroy Merlin ecosystem). And even those who don't usually mostly works.
With that you'd get ZWave reliability, most, if not all, of its security features, with Zigbee lower price. And they still works great with third party coordinator.
But it is true that Z-Wave uses lower frequency than Zigbee (868MHz vs 2.3GHz). It means lower frequency interferences, and better reliability over high distances.
Another issue is that zwave isn't available in all countries (or it is but uses incompatible frequencies) so it's less useful outside the big markets.
I live in a country with 10 million people and it works here. But yes there are probably some that don't have the frequencies.