Quantity   Component name
1 × CC2531 USB Adapter https://www.aliexpress.com/item/CC2531-Zigbee-Sniffer-Wireless-Board-Bluetooth-BLE-4-0-Dongle-Capture-Module-USB-Programmer-Downloader-Cable/32920807462.html
1 × Downloader Cable / Programming Connector (optional) https://www.aliexpress.com/item/CC2540-zigbee-CC2531-BLE-V4-0-Downloader-Cable-Download-Programming-Connector-Sniffer-USB-dongle-BTool-Programmer/32955016874.html
1 × ESP8266 / wemos D1 mini https://www.aliexpress.com/item/D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266-by/32651747570.html