GPS SBAS [(NONE)/AUTO/EGNOS/WAAS/[n]]

Module gpsCommands

Sets the SBAS setting for the GPS module. Auto is not availible for the IT600.
The IT600 only supports one custom PRN, whilst the u-blox can have many seprated by spaces.
Default is AUTO on the u-blox, and NONE on the it600.
No argument prints out the current value.