I also try to control a RTLS_Master (Example Project from SimpleLink SDK 5_10_00_48) - on a LaunchPad CC2642R1 / CC2652R1 with BOOSTER - via the rtls_example_with_rtls_util.py.
As already mentioned in other forum entries and the documentation, I adapt the COM-Port for the master device.
If I run the Visual example the LaunchPad is identified as "Master" and everything works fine.
But if I execute the connection via IDE (Spyder) or Command Line, the master board is not identified.
Unfortunately, the created Log-File gives no further Information.
Do you have any idea why your "out of the box" example is not working?