Yabby LoRaWAN® Config App
Download the Yabby LoRaWAN Config App here:
https://www.oemserver.com/tools/YabbyLoRaWAN/ConfigTool/setup.exe
The Configuration and Usage Guide explains the application and how to connect your computer to the Yabby.
In short, you will need a Yabby Config Adapter, which plugs into the Yabby PCB near the label "UART1".