Electrolama (@omerk and friends) has been working on two open-source hardware 802.15.4/Zigbee projects with "zig-a-zig-ah" (aka "zzh") USB stick based on Texas Instruments CC2652R SimpleLink multi-standard wireless MCU and Zoe (Zigbee + Poe) development board based on Raspberry Pi HAT form factor and powered by TI CC2530 SimpleLink 2.4 GHz SoC alongside CC2592 range extender.
Both boards are released under an Apache-based Solderpad Hardware License 2.0, and target users of the Zigbee2MQTT project. The boards could soon also get native support in Home Assistant via the "zigpy-cc" library which