Well, here I am after going through all the existing threads, unable to get this working on my Pi3 / SDR dongle setup.

I can run from a command prompt as the pi user all day long, but I'll be damned if I can't figure out how to run this on startup.

I see references to screens, tmux, crontab, shell scripts, etc. I hope not to waste everyone's time but I really some hand-holding here. My shell script won't do anything from a command prompt except return to a command prompt. Using ps or top, I don't see direwolf or rtl_fm running.

Any help would be fantastic.

Thanks,

Paul
KK7BIZ

Thanks for the reply, Gil! That is the writeup I found to be the "nicest." That implementation only launches direwolf, NOT rtl_fm piping output to direwolf. My limited Linux command line experience is what is holding me up here. If I had some direction on how to use the following command line with the systemd approach:

rtl_fm -f 144.39M -o 4 - | direwolf -n 1 -r 24000 -b 16 -

开云体育

Hello Paul,

I can run from a command prompt as the pi user all day long, but I'll be damned if I can't figure out how to run this on startup.

When you say you can run things ok from a command prompt, can you say explicitly what command you're running?

I see references to screens, tmux, crontab, shell scripts, etc. I hope not to waste everyone's time but I really some hand-holding here. My shell script won't do anything from a command prompt except return to a command prompt. Using ps or top, I don't see direwolf or rtl_fm running.

What shell script are you running?? Is this something you wrote or are you talking about the dw-start.sh script??? To troubleshoot a shell script, try opening two terminal windows.? In window #1, open an editor and load in the shell script you're trying to run.? In window #2, copy and paste each line from the shell script line by line into this window and see where things break.? Once you have an error, send us the details on this list and we'll help you out.

--David
KI6ZHD

having the same trouble with a dongle not behaving in the script
it will run for forever with this
rtl_fm -f 144.39M -g 30 -p 75 -o 4 - | direwolf -c sdr.conf -n 1 -a 30 -T %H:%M:%S -r 24000 -D 1 -b 16 -

but if I stick that into dw-start.sh, or just the stock SDR example
it appears to bomb with no errors
screen sees its PID but it bombs after

开云体育

Hello K9WKJ,

having the same trouble with a dongle not behaving in the script
it will run for forever with this
rtl_fm -f 144.39M -g 30 -p 75 -o 4 - | direwolf -c sdr.conf -n 1 -a 30 -T %H:%M:%S -r 24000 -D 1 -b 16 -

Ok.. that's good.

digiremote@orangepione:~$ ./dw-start.sh

Direwolf in GUI mode start up

DISPLAY=:0

Did not find an X terminal emulator.? Reverting to CLI mode

-----------------------

Direwolf in CLI mode start up

There is a screen on:

12244.direwolf (03/16/2023 12:37:22 PM) (Detached)

1 Socket in /run/screen/S-digiremote.

If you look in the dw-start.sh script, all additional details go to the LOG file set as /var/tmp/dw-start.log .?? Do you see any errors in there?

--David

David,

Thanks for your reply. The shell script I refer to is one I wrote that simply runs:

bash -c 'rtl_fm -f 144.39M - | direwolf -c igate.conf -r 24000 -D 1 -' &

And that is the corrected version of the shell script, which now runs great from a command prompt. I still have to get it set up to run at startup or using crontab. I'm somewhat happy for now, and it looks like other users jumped in here for help with a similar issue, so that's great!

Thanks everyone for your replies and help.

David,

here is the tail of /var/tmp/dw-start.log

开云体育

Hello k9wkj,

Sorry for the delay but I've been researching your issue and needed to setup an RTL SDR to do actual testing.? During that testing, I remember this issue was brought up some time ago:

??

I can confirm this specific post/approach within this Github issue works for me where as the other posts/approaches don't work.? I think the root issue here is the multiple levels of abstraction using variables when trying to be user friendly actually makes the Bash shell script break.?

I've attached a copy of the modified script here and we'll see if groups.io posts it or not.? If it does, review it and give it a try and let us know if it works or not.

--David
KI6ZHD

thank you David
that works just fine
took me a bit to gather that the command actually needs to be in 2 places
not sure why that is, maybe a definition? and then a execution
but it works great
I stuck it in a crontab so it takes care of itself

super

thanks again

de k9wkj