homeassistant

Zigbee is wonderful. Be mindful of your network layout. Ensure you have plenty of routers strewn throughout, as it’s a mesh network.

Most smart plugs are routers, which makes it easy. I’ve had great success with THIRDREALITY plugins.

The best thing I’ve done: installed a POE coordinator in the center of my home. The SLZB-06M has been a champ.

Two huge benefits of going with Zigbee over WiFi:

1. Zigbee is offline.
2. Adding WiFi devices adds more interference and congestion to your network, causing instability. Zigbee rides in the same spectrum, but just a sliver of it.

More ip devices on your network also increases attack surface. Keep it simple.

One thing I like about Z-Wave and Zigbee devices is that they can't connect to the internet no matter what, because they don't have the hardware for it.

• This means you don't need to worry about them phoning home with usage data. (privacy)
• It means you don't need to worry about them being used by a hacker to penetrate your network. (security)
• It means you don't need to worry about them being a node in some botnet mining crypto for someone else with your electricity. (resource usage)

You've already got HomeAssistant to connect them to your Google Home or HomeKit account, so you can still turn on your closet light from the bar or whatever. You're not losing anything by them not being connected to the internet directly. You just never have to worry about that stuff. Instead of having to keep 40 devices that were sold by some company that no longer exists up to date on their firmware, you just need to keep HA up to date.

All it costs is one $30 usb dongle.

ZigBee devices are really nice because they are low energy, easy to set up and don't add extra strain on your wifi access point(s). The battery operated ones last for months to years on a small button cell battery and most plug-in/wired ones act as repeaters. Also, a lot Wi-Fi devices are cloud based or require flashing to make them completely local. With ZigBee or even Zwave you are certain they have no internet access and cannot phone home without you having to put any precautions in place.

I've got about 30 zwave devices, and at first the idea of the 900mhz mesh network sounded like a really solid solution. After running them for a few years now if I were doing it again I would go with wifi devices instead.

I can see some advantages to the mesh in a house lacking wifi coverage. However I would guess most people implementing zigbee/zwave probably have a pretty robust wifi setup. But if your phone doesn't have great signal across the entire house a lightswitch inside of a metal box in the wall is going to be worse.

Zwave is rather slow because it is designed for reliability not speed. Not that it needs to be fast but when rebooting the controller it can take a while for all of the devices to be discovered, and if a device goes missing things break down quickly, and the entire network becomes unresponsive even if there is another path in the mesh. Nothing worse than hitting one of your automations and everything hangs leaving you in the dark because one outlet three rooms over is acting up.

It does have some advantages, like devices can be tied to each other (i.e. a switch tied to a light) and they will work even without your hub being up and running (zwave controller I think can even be down).

Zwave/Zigbee also guarantee some level of compatibility/standardization. A lightswitch is a lightswitch it doesn't matter which brand you get.

On the security front Zwave has encryption options but it slows down the network considerably. Instead of just sending out a message into the network it has to negotiate the encrypted connection each time it wants to send a message with a couple of back and forth packets. You can turn it on per device and because of the drawbacks the recommendation tends to be, to only encrypt important things like locks and door controls which isn't great for security.

For Zwave 900mhz is an advantage (sometimes). 900mhz can be pretty busy in densely populated areas, but so can 2.4 for zigbee/wifi. If you have an older house with metal boxes for switches/plaster walls the mesh and the 900mhz penetration range may be an advantage.

In reality though I couldn't bridge reliably to my garage about thirty feet away, and doing so made me hit the Zwaves four hop limit so I couldn't use that bridge to connect any additional devices further out. With wifi devices connecting back to the house with a wifi bridge, a buried Ethernet cable, etc can extend the network much more reliably. I haven't tried any of the latest gens of Zwave devices which are supposed to have higher range.

The main problem with wifi devices is that they are often tied to the cloud, but a good number of them can be controlled over just your LAN though. Each brand tends to have their own APIs/protocols though so you need to verify compatibility with your smart hub before investing.

So if you go the wifi route make sure your devices are compatible and specifically check that your devices can be controlled without a cloud connection. Especially good to look for devices like Shelly that allow flashing of your own firmware or have standardized connection methods in their own firmware (Shelly supports MQTT out of the box)

I prefer zwave and zigbee because they give me 12 months plus on small batteries, and I can not get this on WiFi devices. This greatly improves where I can install sensors and the like.

Even when I have a larger battery, such as the 60ah battery I use for my back garden lighting, I still use them as it reduces power draw over a WiFi controller.

I can also directly connect them to smartthings and more recently home assistant thst I have migrated to rather than connecting to a WiFi device via a Web service. This improves reliability and speed on average.

I get no problems with running a large network of such devices, I have over 100 bulbs, relays, plugs, and sensors that are connected. My WiFi is decent and supports 8 nest cams that are outside plus another 20 or so devices that are inside, so it offers a similar range for me.

I run Zwave and love it. Advantages:

• better range and less interference in 900mhz band with meshing
• better battery life. WiFi uses up to an order of magnitude more power. Battery in Zwave devices lasts for years, with new ones being even better in this regard
• more secure as they cannot be hacked by hacking your internet or getting on your WiFi.
• more feature rich. Zwave devices tend to be geared towards more pro use and tend to have just about every feature you can imagine
• The Zwave standards body is quite strict in ensuring devices adhere to the standard so it's much harder to get "stinker" devices that don't. This is a bigger problem with zigbee for example.
• fully local. You can be 100% sure they aren't sending your data off somewhere
• Generally high quality. I've had quite good luck with pretty much all the Zwave devices I've bought. They last a long time and are reliable if your mesh is working properly (enough powered repeater nodes).

Zigbee/Z-Wave/Thread are all meant for sensors. WiFi not so much. It's easier to host more sensors on the purpose-built network types. Special consideration for Z-Wave since it uses different frequency than WiFi, which the others do not.

WiFi and batteries don't really go together, which also puts a real limit on what you can do there.

I have Zigbee stuff. Here’s what I like about that: they bridge between each other (if they’re powered rather than battery operated) and that extends the range. The range can be great to begin with! They’re not on my network, adding confusion or load on the access points, plus they can’t phone home… all local. Then there’s smart switches, and I’m going to point out that without WiFi they can’t be controlled, but Zigbee? Sure, I can easily power cycle my router and access points with Zigbee smart plugs! In fact I have an automation to do that daily. Finally, if something is WiFi you can’t know in advance if it’s cloud based or not, and regardless of that it’s a potentially unsafe device that is connected to the internet. Low power, but botnets work with numbers rather than power.

I also thought zigbee was more open and had less licensing fees.

Home Assistant + a dongle of your choice. I won't even get into zigbee vs zwave. Both are great just different vendor support.

Matter sort of makes Wifi more viable, but Zigbee is a proper mesh that generally works great. The more devices, the more reliable the network.

Zwave theoretically works similarly, but I've found it to have way more problems.

With non-wifi devices I can be certain I won't be bamboozled into buying something cloud-only

I have 8 Z-wave devices now, including a couple "long range" devices. With the first couple, I would sometimes have trouble with the farthest, battery-powered device dropping out of the network occasionally, but that hasn't happened as I've added more devices. I fought with pairing the initial devices - clicking the right series of buttons at the same time as telling HA to look for devices to join - but all the recent devices have just has a QR code - scan it into HA, and the device just shows up when I turn it on. I don't know how much of this difference between new and old is my learning curve vs better product support, but I am really happy with my Z-waves now.

Z-wave rather than wifi so I know they aren't phoning home.

I very briefly tried a couple zwave light bulbs with a USB zwave adapter for Home Assistant, but couldn't get it reliable. I do like the mesh + low power idea though and played around with ZigBee dev boards previously.

I have settled on mostly Tasmota firmware on ESP8266 based devices. Lots of switches (from the CloudFree shop among others), smart plugs, and other devices. I also like to assemble my own sensor/relay boards, which Tasmota is great for. I did have to set a fixed 2.4Ghz channel on one router, and later set "IoT mode" on my Unifi network, to avoid devices falling off the network. I also have flashed most of the devices, but am happy to do that (not so different from uploading an Arduino sketch once you're used to it).

Zigbee sucks and is a source of constant problems for me, but you can't have a thumb sized door sensor using wifi, it uses too much energy.