The methods _parse_gpgsa() and _parse_gpgsv() are never called from the message parser update(). The also leads to the following variables never being updated sel_mode, fix_quality_3d, sat_prns, pdop, hdop, vdop & satellites_prev.
The GSA (GPS DOP and active satellites) and GSV (Satellites in view) messages looks like they might provide useful extra information if received.
The methods
_parse_gpgsa()and_parse_gpgsv()are never called from the message parserupdate(). The also leads to the following variables never being updatedsel_mode,fix_quality_3d,sat_prns,pdop,hdop,vdop&satellites_prev.The GSA (GPS DOP and active satellites) and GSV (Satellites in view) messages looks like they might provide useful extra information if received.