Author Archives: Lasse Karstensen

Doing consulting work

Been meaning to write this for a while. I’ve been working as an independant consultant since January. I left my position as tech lead with Varnish Software, having spent almost five years there, knowing it was time to do something … Continue reading

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fdxread 0.9.1 released

I’ve released version 0.9.1 of my Nexus FDX protocol decoder. It does things like read .nxb files a lot quicker than before, handle USB disconnects/reconnects of the GND10 (when running), serial port timeout, and lots of other stuff. As of … Continue reading

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Regatta race course by SMS

Cowes Week does something interesting; they’re sending out the chosen race course over SMS to the contestants[1]. The cool part about this, for the racers, is that it allows for automatic adding of waypoints on the yachts. Through the years, … Continue reading

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Looking for FDX data dumps (Nexus .nxb files)

I’m looking for data dumps containing FDX protocol data. Last year I wrote a FDX data decoder in Python (see Garmin GND10 unveiled (it is Nexus FDX!)), and with the sailing season starting there is some interest in improving it. … Continue reading

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Boat electronics hacking on 33c3

I’ve set up a small workshop / meetup on boat electronics hacking at 33c3 this year. 33c3 is the 33rd yearly congress for the Chaos Computer Club and collects around 5000 awesome people in a big conference centre in Hamburg. https://events.ccc.de/congress/2016/wiki/Session:Boat_instruments_hackingContinue reading

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Seatalk and the ST2000+ autopilot

I’ve been looking at interfacing my Raymarine ST2000+ tiller auto pilot with the other sensors onboard. The perceived upside of this is that it will steer based on wind angle instead of compass angle. This is nice on longer distance … Continue reading

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Garmin GND10 unveiled (it is Nexus FDX!)

Mother of all detours; the USB port on the Garmin GND10 isn’t NMEA2000, it is something called Nexus FDX. That took a couple of weeks to figure out, hunting for NMEA2000 protocol headers. Always check your assumptions. Anyway, I’ve written … Continue reading

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NMEA2000 and CANbus

I’ve been looking at NMEA2000 and CANbus lately. I’m attempting to reverse engineer the binary protocol seen coming out of the USB port on a Garmin GND10 network bridge, and that opens a whole field of new and interesting stuff … Continue reading

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Shutting down hostedmunin.com

Keeping this short: I’m shutting down my side project running a hosted Munin monitoring service from mid August 2016. Priorities have changed, and since I don’t run many servers these days I don’t spend the time maintaining it that such … Continue reading

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Varnish Device detection looking for maintainer

We’re looking to have someone take over maintenance of the Varnish Device detection VCL set. The last couple of years we haven’t really served it right, and it is time to let someone with more practical/hands-on experience take over. I’ve … Continue reading

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