barnaclebill
SKSignal K
•Created by barnaclebill on 8/8/2024 in #questions
inject data?
What's the simplest way to inject navigation.magneticVariation into the SK data stream (so Derived Data can calculate true heading from magnetic heading)? It is OK if it's a constant; I can change it once a year.
18 replies
SKSignal K
•Created by barnaclebill on 7/20/2024 in #questions
SK install on node 22.5.0?
Hello all, I am having issues installing SK on a couple of RPIs. First I tried installing on a Pi Zero 2W with Debian 12 Lite (Bookworm, no desktop) and
sudo npm install -g signalk-server
didn't complete after 14 hours (there were some warnings but nothing that looked like a real error).
I assumed it was because of swap because the vmem for npm was very high and the Zero has only 512MB, so I tried on my pihole (RPI 4, Bookworm lite, 1GB) and that had the same issue but eventually completed (tail of error log below). I'm wondering if I should downgrade node or npm to a different version, or if anyone has other ideas.
3134 verbose node v22.5.0
3135 verbose npm v10.8.2
3136 error Exit handler never called!
3137 error This is an error with npm itself. Please report this error at:
3138 error https://github.com/npm/cli/issues
3139 verbose exit 0
3140 info ok
9 replies
SKSignal K
•Created by barnaclebill on 5/3/2024 in #questions
How do I enable more debugging information in SK Server?
15 replies
SKSignal K
•Created by barnaclebill on 3/25/2024 in #questions
N2K libraries?
Is there a discussion forum for the ttlappalainen N2K libraries? Or can we discuss here? My question is sort of SignalK-adjacent.
2 replies
SKSignal K
•Created by barnaclebill on 3/20/2024 in #questions
proprietary sentences?
What does SK do with proprietary sentences (or more generally, any data on the N2K network that doesn't fit into the schema)?
I am trying to help a friend interpret B&G rudder angle sensor data to make a more open autopilot for B&G boats. Apparently there are some proprietary sentences between the B&G angle sensor and the instruments, but the B&G sensors will not physically fit on his boat. B&G ignores PGN 127245 if it's not from a B&G sensor. I would like to install an SK RPI on his network and log data from the start to see if we can figure out what B&G expects and emulate it, but I don't have access to the boat or instruments so I can't just try it out.
4 replies
SKSignal K
•Created by barnaclebill on 3/9/2024 in #questions
0183 heading
$HCHDM,138.01,M
Is this a valid NMEA 0183 sentence (Heading Magnetic)? kplex seems to ignore it.
12 replies
SKSignal K
•Created by barnaclebill on 3/3/2024 in #questions
heading info
Are there any simple ways to get bearing/heading info into SK (on RPI4)? (Not including commercial N2K compasses). I have a few 3-axis magnetometers I've been playing with on ESP32 (my hardworking SH) but it seems simpler to plug them into the Pi and let SK handle the rest. I could probably install some pypilot components but I'm looking for something even easier, if it exists!
7 replies