I used to use a USB Zigbee coordinator, but an Ethernet one with PoE is way more flexible since I can place it anywhere in the house. https://smartlight.me/smart-home-devices/zigbee-devices/smlight-slzb-06en. This one has a nice web UI for updating the firmware, too. I switched from a Sonoff Zigbee dongle recently and really should have done it earlier.