This software allows you to find the key for the NXDN 48, NXDN 96 and dPMR scramblers.

You must flash the .uf2 file into a raspberry Pico.

A Raspberry Pico is a small controller that can be plugged into a PC on a USB port, it costs only a few dollars.

This software works on a Raspberry Pico 1, I don't know if it works on a Pico 2.

When you connect the Pico to a PC, the COM port may vary, it will not always be COM6.

 You will have to go to the Device Manager to find the COM port number you have.