Raspberry Pi GPS Utility Scripts

maidenhead.py

#!/usr/bin/env python2

from __future__ import print_function, unicode_literals

import gps
import gps.clienthelpers


def get_lat_lon(client):
    while client.read() == 0:
        if (client.valid & gps.PACKET_SET and
            client.data["class"] == "TPV" and
            client.data.mode >= gps.MODE_2D and
            hasattr(client.data, "lat") and
            hasattr(client.data, "lon")
        ):
            return (client.data.lat, client.data.lon)


if __name__ == '__main__':
    mode = (
        gps.WATCH_ENABLE |
        gps.WATCH_JSON |
        gps.WATCH_SCALED
    )
    client = gps.gps(mode=mode)

    lat, lon = get_lat_lon(client)
    mh = gps.clienthelpers.maidenhead(lat, lon)

    print(mh)

sync_gps_time.sh

#!/usr/bin/env bash
 
set -eu
 
GPSTIME=$(gpspipe -w | grep -m 1 \"time\": | jq -r .time)
echo "GPS Reported Time: $GPSTIME"
 
date -I -s "${GPSTIME}" 1>/dev/null

Requires sudo apt-get install gpsd gpsd-clients python-gps jq

This was done using the VK-162 USB GPS receiver.