Set mode and power output for the Nanoavionics Sat2RF1 satellite radio module.
For testing and debugging purposes.
Always make sure there's a properly sized 50Ω load connected to the RF output!
$ python setmode.py [-h|-v] --mode=<0...2> --power=<-16...6> --port=/path/to/interface
0 = Packet receive (default), 1 = Transparent receive, 2 = continuous transmit (beacon).
Power is given in dBm, in the range -16dBm to 6dBm, inclusive.
To transmit a beacon at full power with the radio connected through /dev/ttyUSB0:
$ python setmode.py --mode=2 --power=6 --port=/dev/ttyUSB0