I run Home Assistant on a Raspberry Pi 4 (in a Geekworm case with a large SSD). I have played with Zigbee2MQTT sticks in the past and they are hacky to get going with HA. With the Popp ZB-Stick, you add the Zigbee integration, select Ember as the type, select the port (e.g. /dev/ttyUSB0) and it just works (beautifully)! At this point you can go into "Devices" on the ZB-Stick and search for Zigbee devices to pair with them. Nothing more to configure. Nothing more to do. Very reliable and great value for money. Finding Zigbee devices which work well with HA is slightly harder. Vesternet - please can we have a list of hubs that each of your devices work against (including Home Assistant and the Popp ZB-Stick) for each smart device you sell. Just saying "Zigbee" does not tell you whether Home Assistant can use it!