Author Topic: AIS Decoder - beta release  (Read 19487 times)

shaolin

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Re: AIS Decoder - beta release
« Reply #30 on: 03 August, 2014, 10:41:59 am »
Ok, thank you very much!

timyboyb

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Re: AIS Decoder - beta release
« Reply #31 on: 21 November, 2014, 03:29:05 pm »
Hello,

I've just tried to install the soundcard version (just AISdecoder) but when I use the cmake command it asks for libasound-dev and libpulse-dev. When I install them it installs an newer version: libasound2-dev so still says it needs libasound-dev.  How can I solve this problem?

Where can I find a good walktrough for the RTL-SDR version on a raspberry Pi? I have an RTL-SDR as well but I-m still a newby on the linux part. I have a kplex running so I understand a little now.

sven98de

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Re: AIS Decoder - beta release
« Reply #32 on: 12 December, 2014, 04:06:04 pm »
Hi,
is it possible to receive both AIS channels simultaneously with the RTL2832 as well,
or is this only possible with the soundcard ?

Sven


Hi this also works with the RTL2832U (RTL SDR usb sticks) tested with R820T tuner.

Usage is as follows:

create a common fifo
mkfifo /tmp/aisdata

open one terminal with rtl_fm, writes to fifo:
rtl_fm -f 161975000 -g 40 -p 95 -s 48k -r 48k /tmp/aisdata

open a second terminal with aisdecoder, reads from fifo:
./aisdecoder -h 127.0.0.1 -p 10110 -a file -c mono -d -l -f /tmp/aisdata

using opencpn and configuring a UDP port with IP 0.0.0.0 and port 10110 you can see received AIS positions in realtime.

important usage of rtl_fm:
for second AIS frequency use  -f 162025000
fine tune gain parameter (-g )  and most important ppm error ( -p )

best
Fred