Originally Posted by MarkMac
What you have managed to do is just incredible.
Thanks for posting
Thank you. There are may be 5 CF members who understand what is happening in this thread and the implication it has. As HAM radios become better programmable, we can program them to do many jobs on a boat. I am sure that this Kenwood can be an AIS transponder plus VHF radio just by modifying the software
Update: The Furuno Navnet3D can output a NMEA
WPL sentence, but it does not support it when we send it to it's input.
I did put in a feature request with OpenCPN which looks like to be approved and taken up by somebody so I guess we'll get it somehow.
I wish I would have a development kit for the Kenwood so that I could output a different sentence, like DCS or ARPA tracking which is supported by the chart plotters. I don't want to put a computer in between.
There is an easy way out however: a friendly Italian manufacturer, Avmap, is selling a GPS navigator much like a Tomtom or Garmin
but it supports APRS input (!!) and it supports user-created maps (!!!). It is the G6 APRS model:
Here you see it decode a packet from an APRS weather
I also found that I can reprogram the Kenwood to receive AIS because it's modem
is 9600bps and it allows to tune into the AIS modulation scheme. However, you get the raw packets in the TNC KISS mode, which need to be processed to get to NMEA
VDM messages. I'm afraid that I don't have enough time and incentive to travel down that path
I'm also working on finishing my Navnet
TZ install. Just got it to fully work so I'm now waterproofing cable connections etc. I had pulled a wrong cable before so that got me a bit pissed off with myself
I did get the right cables
but also a very nice ethernet switch and USB hub that are both with shielded metal case and wide range DC power input, like 9-24V. The switch now has my Navnet
3D display and radar
scanner and the MacMini with MaxSea
connected to it and works great. I need to tidy that up.
The USB hub gives you a fool proof externally powered hub, mounted where you can quickly plug
stuff in like GPS, hard disk, N2K converter etc. Need to install that too.
I keep finding NMEA 0183
connections even after switching to NMEA 2000
. I now have 3 feeds at the navstation: VHF for DSC
and two from the Kenwood radio (GPS + APRS). I think my SSB
also has NMEA output and DSC
... so I will relocate my old 4800bps NMEA mux to the navstation to put all that into one single NMEA stream. I also ordered an Actisense converter so that I should be able to put anything together. I'll just pull some extra cables
here and there to make sure that I don't have to open the ceiling again after this.