Usage: gpspipe [OPTIONS] [server[:port[:device]]]

  --count COUNT    Exit after COUNT packets.
  --daemonize      Run as daemon.
  --debug LVL      Set debug level to LVL.
  --help           Show this help and exit.
  --json           Dump gpsd native JSON data.
  --nmea           Dump (pseudo) NMEA.
  --output FILE    Write output to FILE.
  --pps            Include PPS JSON in NMEA or raw mode.
  --profile        Include profiling info in the JSON.
  --raw            Dump super-raw mode, GPS binary and NMEA.
  --scaled         Set scaled flag. For AIS and subframe data.
  --seconds SEC    Exit after SEC seconds delay.
  --serial DEV     Emulate a 4800bps NMEA GPS on DEV (use with '-r').
  --sleep          Sleep for ten seconds before connecting to gpsd.
  --spinner        Print a little spinner.
  --split24        Set the split24 flag.
  --timefmt FORMAT Set the timestamp format (strftime(3)-like; implies '-t').
  --timestamp      Time stamp the data.
  --usec           Time stamp in usec, implies '-t'. Use twice for sec.usec.
  --version        Print version and exit.
  --nobuffer       do not buffer output
  --zulu           Set the timestamp format to iso8601, implies '-t'
  -2               Set the split24 flag.
  -d               Run as a daemon.
  -D LVL           Set debug level to LVL.
  -h               Show this help and exit.
  -l               Sleep for ten seconds before connecting to gpsd.
  -n COUNT         Exit after count packets.
  -o FILE          Write output to FILE.
  -P               Include PPS JSON in NMEA or raw mode.
  -p               Include profiling info in the JSON.
  -r               Dump (pseudo) NMEA.
  -R               Dump super-raw mode, GPS binary and NMEA.
  -s DEV           Emulate a 4800bps NMEA GPS on DEV (use with '-r').
  -S               Set scaled flag. For AIS and subframe data.
  -T FORMAT        Set the timestamp format (strftime(3)-like; implies '-t')
  -t               Time stamp the data.
  -u               Time stamp in usec, implies '-t'. Use -uu to output sec.usec.
  -v               Print a little spinner.
  -V               Print version and exit.
  -w               Dump gpsd native JSON data.
  -x SEC           Exit after SEC seconds delay.
  -B               do not buffer output
  -Z               Set the timestamp format to iso8601, implies '-t'.

You must specify one, or more, of: --json, --nmea, --raw, -r, -R, or -w
You must use -o if you use -d.