I've got an old GPS receiver on the bridge spewing endless strings …
Task
I've got an old GPS receiver on the bridge spewing endless strings like $GPGGA into the COM port, and I can't tell where the coordinates and speed are. I want to feed it a log file and get a proper table back: time, latitude, longitude, speed.
Solution plan
What We'll Build
- A lightweight NMEA 0183 parser that ingests your raw log file (COM-port capture) and decodes $GPGGA (position/time) and $GPVTG or $GPRMC (speed over ground) sentences.
- A clean export: structured table (CSV/Excel) with columns — UTC time, latitude (decimal degrees), longitude (decimal degrees), speed (knots/km/h).
- Optional: a simple web-based UI or script you run locally — no cloud dependency required.
How It Works
- Source: your raw `.log` / `.txt` file captured from the COM port; no live connection needed.
- Parsing layer: validated checksum verification per NMEA 0183 spec, field extraction with coordinate conversion (DDMMmm → decimal degrees).
- Processing runs entirely on your machine (edge/local) — no proprietary hardware required.
Next Step
Upload a sample of your log file (even 20–30 lines) in the project workspace, along with any notes on baud rate or receiver model if you have them. We'll confirm sentence coverage and turn around a working parser spec within one business day.