gpsctl

Utility for U-Blox GPS receivers

A utility for querying, configuring, and using a U-Blox GPS. All configurations are done via /etc/gpsctl.conf. Some gpsctl functions work for any GPS streaming NMEA data over a serial port: * Echoes NMEA data to stdout, optionally filtered by NMEA message type. * Infers the GPS' baud rate from the stream of NMEA data. Other gpsctl functions are specific to U-Blox GPS hardware: * Configures the baud rate that the U-Blox GPS uses for communication. * Configures whether the U-Blox GPS transmits NMEA data. * Infers the GPS' baud rate using the UBX protocol only. * Configures the use of the European Galileo satellites (which is off by default in U-Blox 3.01 firmware) and enables NMEA version 4.1 output for Galileo. * Queries the U-Blox GPS for position, time, GPS version, GPS configuration, and GPS satellite information. The format of query results are selectable: either plain English or JSON. * Tests the pulse-per-second output of the U-Blox GPS (fundamental for NTP). * Configures the U-Blox GPS for maximum timing pulse accuracy (useful for building a stratum 1 NTP server based on the GPS' notion of time). * Disables NMEA RMC, VTG, GSA, GSV, GLL, GGA messages and enables ZDA (for NTP driver 20 mode 8) * Saves the U-Blox GPS configuration to on-module battery-backed memory. * Resets the U-Blox GPS. Note: The gpsctl binary was renamed to gpsctl_ph to prevent a naming conflict with gpsctl from gpsd-clients !!!