The CC2531 is a complete ZigBee / IEEE 802.15.4 transceiver bundled with an 8051 CPU and an USB interface on one chip.

s.click.aliexpress.com/e/8TaxhkU

github.com/Koenkk/Z-Stack-firmware/blob/master/coordinator/Z-Stack_3.0.x/bin/CC2531_20190425.zip

www.ti.com/tool/FLASH-PROGRAMMER

CC Debugger Zigbee Emulator Support
www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=CC+Debugger&_sacat=0

www.gadget-freakz.com/zigbee-in-home-assistant-with-zigbee2mqtt/


Parts:
www.ebay.co.uk/itm/CC2531-Analyzer-Module-Stable-Sniffer-Protocol-Wireless-USB-Interface-For-Zigbee/163911036662
www.ebay.co.uk/itm/CC2531-Sniffer-Protocol-Analyzer-USB-Dongle-BTool-Downloader-for-Zigbee/372750840596
www.ebay.co.uk/itm/CC-Debugger-and-Programmer-Downloader-for-RF-System-on-Chips-Fast-UK-Shipping/163891479384