Nabu Casa Home Assistant Connect ZWA-2 vs Smlight SLZB-06

It comes down to protocol. The Smlight SLZB-06 is the more flexible, better-connected Zigbee/Thread coordinator with Ethernet and PoE, so it wins for Zigbee networks. The Nabu Casa Home Assistant Connect ZWA-2 is a Z-Wave-only controller, higher-rated within its lane, and the choice for Z-Wave devices.

Protocol and placement. The Smlight SLZB-06 handles Zigbee and Thread and connects over USB, Ethernet, Wi-Fi or PoE with a Bluetooth proxy, while the Nabu Casa Home Assistant Connect ZWA-2 is a USB-only Z-Wave controller with no Zigbee, Thread or Bluetooth proxy.

No. The Smlight SLZB-06 is Zigbee/Thread only, and the Nabu Casa Home Assistant Connect ZWA-2 is Z-Wave only. Running both protocols would mean using one of each, since neither is multi-protocol on its own.

The Smlight SLZB-06, thanks to Ethernet, Wi-Fi and PoE, so you can mount it centrally for better Zigbee range. The Nabu Casa Home Assistant Connect ZWA-2 is USB-only and plugs into your Home Assistant host, relying on its external antenna for reach.

Buy the ZWA-2 if you run Z-Wave and want a highly rated, official controller with excellent range from its external antenna and amplifier, and fully local control via Z-Wave JS. It has no Zigbee or Thread.

Buy the Smlight SLZB-06 if you want a network-connected Zigbee/Thread coordinator you can place anywhere via Ethernet or PoE, with a Bluetooth proxy, to stabilize and extend a Zigbee mesh. It has no Z-Wave.