gpspipe log time with micros and lat lon, python3 only

README.md

curl 'https://gist.githubusercontent.com/sloev/5de3ed6bc5d3e78f656029071eb16409/raw/728aee9e9a88281d7bcb398f2408aa5051632c1d/gpslog.py' > ~/gpslog.py 
    
curl 'https://gist.githubusercontent.com/sloev/5de3ed6bc5d3e78f656029071eb16409/raw/728aee9e9a88281d7bcb398f2408aa5051632c1d/gpslog.sh' > ~/gpslog.sh 
    
curl 'https://gist.githubusercontent.com/sloev/5de3ed6bc5d3e78f656029071eb16409/raw/728aee9e9a88281d7bcb398f2408aa5051632c1d/gpslog.service' > ~/gpslog.service

sudo cp ~/gpslog.service /etc/systemd/system/gpslog.service
sudo systemctl enable gpslog.service
sudo systemctl restart gpslog.service

gpslog.py

import subprocess
import json
import io
import sys
import time
import logging
logging.basicConfig(level=logging.INFO)

logging.info("starting gpspipe error tolerant loop")
logging.info("output format is\niso_time,lat,lon")

while True:
    try:
        proc = subprocess.Popen(['gpspipe','-wul','--zulu'],stdout=subprocess.PIPE)
        logging.info("starting gpspipe...")
        printed_first_gps_log = False
        for line in io.TextIOWrapper(proc.stdout, encoding="utf-8"):
            if not line:
                break

            if "TPV" in line and "lat" in line:
                t, d = line.split(": ")
                d = json.loads(d)

                output = f"{t},{d['lat']},{d['lon']}"
                sys.stdout.write(output+"\n")
                sys.stdout.flush()
                if not printed_first_gps_log:
                    logging.info(f"got first gps pipe log: {output}\noutputing them to stdout...")
                    printed_first_gps_log=True
        exit_code = proc.wait() 
        if exit_code != 0:
            raise RuntimeError(f"gpspipe exited with: exit_code")
    except KeyboardInterrupt:
        break
    except:
        logging.exception("gpspipe errored, waiting 1 second and trying again")
        time.sleep(1)

gpslog.service

[Unit]
Description=gps log service

[Service]
Type=simple
Restart=always
RestartSec=3
ExecStart=/bin/bash /home/pi/gpslog.sh

[Install]
WantedBy=multi-user.target

gpslog.sh

#!/bin/bash

#/bin/python3 /home/pi/gpslog.py >> /mnt/data/gps.log
/usr/bin/gpspipe -Ruv --zulu | grep '$GP' --line-buffered  | sed -u "s/: /,/g" >> /mnt/data/gps.log