Not sure which boot time you mean, the Orange Pi boots up to the chart display in 30-40 seconds, but it is doing lots of initialization, connecting to my nav system, etc. I’ve not optimized that because I almost never turn it off. OpenCPN
starts in about 4 seconds to a chart, if I click on it from the menu.
I think the key to the APT satellites is the antenna
, I tried with a wire dipole antenna
without much luck, then I made a crossed dipole, which is actually circularly polarized like the signal, tuned to 137 MHz and it worked quite well. Everything has to be right of course, satellite
times, correct frequency per satellite
, etc. I use a set of python scripts available as a git download, https://github.com/DrPaulBrewer/rtls...-wxsat-capture
I also have a dedicated APT radio
that uses a usb port and a sound card which makes slightly better images
on the PC. I could never get high quality sound input on the Orange PI to use that radio
It uses sox and wxtoimg to do the processing and predict to track the satellites. I hacked (my python skills are terrible, though) it to interrupt the rtl-ais function when a satellite is overhead.
I’m not sure what you mean by connecting the OpenCPNs. I do have it on both machines, I use the PC one for planning, mostly. How do you Sync the routes and tracks?
I guess because I hadn’t found the git repository for openplotter, that is a good idea I’ll look for it and see if I can get it running.
It has been very stable, I started it in September and it ran continuously for my passages from Samoa
to NZ. I turned it off when we went back to the states for the Christmas
holidays. I’m using Armbian linux
, which seems fairly well sorted out.