boatbod
Member
Order of parameters doesn't matter as long as all are specified prior to the log redirection sequence "2> stderr.2"
op25 help!
- Thread starter kc8zmp
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Order of parameters doesn't matter as long as all are specified prior to the log redirection sequence "2> stderr.2"
My op25.sh file:
./rx.py --nocrypt --args "rtl" --gains 'lna:36' -S 960000 -q 0 -x 2.5 -T trunk.tsv -d 0 -v 1 -2 -V -U 2> stderr.2
This works for my RTL SDR, but I can't get it to work properly with my HackRF. I changed the args from "rtl" to "hackrf", but it still doesn't talk to the device. The OP25 app starts, but it doesn't seem to see the control channel and the tsbks remain at zero. Please note the HackRF works with gqrx. Any ideas why this won't work?
./rx.py --nocrypt --args "rtl" --gains 'lna:36' -S 960000 -q 0 -x 2.5 -T trunk.tsv -d 0 -v 1 -2 -V -U 2> stderr.2
This works for my RTL SDR, but I can't get it to work properly with my HackRF. I changed the args from "rtl" to "hackrf", but it still doesn't talk to the device. The OP25 app starts, but it doesn't seem to see the control channel and the tsbks remain at zero. Please note the HackRF works with gqrx. Any ideas why this won't work?
boatbod
Member
You likely need different parameters for --gains, --args or -S
Unfortunately I don't own a hackrf so I can't say what magic incantation is necessary to make it work.
wgbecks
Active Member
I don't know what the defaults are for HackRF but you might try to specify all of the parameters.
Try something like this: ./rx.py --args 'hackrf' -N 'RF:14,IF:32,BB:26' -T trunk.tsv …… etc.
Depending on the signal level you have to work with, you might have to adjust the gain(s) higher or lower to get tsbks from the control channel.
Bill
Try something like this: ./rx.py --args 'hackrf' -N 'RF:14,IF:32,BB:26' -T trunk.tsv …… etc.
Depending on the signal level you have to work with, you might have to adjust the gain(s) higher or lower to get tsbks from the control channel.
Bill
kc8zmp
Member
Will a Sdr Play Rsp1a work with op25? On a pi4?
boatbod
Member
sdrplay is supported by gr-osmocom driver so it should be possible to make the Rsp1a work with op25. Whether or not it works on a rpi4 I cannot say for sure, but if the rsp1a works with other apps on the rpi4 then op25 should as well.
You will need different command line parameters, but other than the driver name I don't know what they need to be.
--args "sdrplay"
--gains ??????
StaRipper
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I can see the device on the Raspberry Pi 3 :
######################################################
## Soapy SDR -- the SDR abstraction library ##
######################################################
Found device 0
driver = sdrplay
label = SDRplay Dev0 RSP1
But still op25 is not starting with --args "sdrplay" nor with --args "rtl"
With --args 'soapy=0,driver=sdrplay' the op25 starts but "Waiting for data... " is displayed.
Anyone ?
Last edited:
boatbod
Member
Can you make it work with GQRX?
StaRipper
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Did not try this and I really don't need GQRX.
Last edited:
I was never able to get OP25 to work with my RSP1a on a Pi4. Works great with GQRX however. I am now using SDR usb dongles exclusively with no problems at all on a Pi4.
StaRipper
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Installed GQRX and it's working with miri=0
boatbod
Member
Understood, but my point for asking is that GQRX uses the gr-osmocom driver the same as op25, so whatever parameters work with gqrx should also work with op25.
StaRipper
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Okay, I've tried with --args 'miri=0,driver=sdrplay' and tried 'miri=0' . same thing. the op25 starts, but "Waiting for data... " is displayed.
boatbod
Member
The "waiting for data" message is generated by the http terminal when it hasn't been sent any updates from the trunking code. This might be as simple as the app not being tuned correctly so no TSBKs are being received. Have you looked at the specturum (fft) plot #1 to see if there in any signal being received?
StaRipper
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No information in FFT and it still showing "waiting for data" in FFT page too.
boatbod
Member
Yup. If there's no signal in the fft plot there won't be any tsbks to receive so the "waiting for data" will stay there forever.
StaRipper
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How can i find what to put in values of -N 'IFGR:20,RFGR:8' or -N 'IFGR range:20,RFGR range:8' ?
I saw that in this thread:
op25 with SDRplay rsp1a troubles
I saw that in this thread:
op25 with SDRplay rsp1a troubles
boatbod
Member
I really wish I could help more but I don't own an SDRPlay and have never used one. Hopefully someone that does can advise further.
Generally speaking with any SDR, you can increase the gains to bring up the signal level while watching for a rise in the noise floor. You trade off one against the other to find the point where you get the best signal to noise ratio.
Generally speaking with any SDR, you can increase the gains to bring up the signal level while watching for a rise in the noise floor. You trade off one against the other to find the point where you get the best signal to noise ratio.
KA1RBI
Member
I thought rx.py was supposed to print out a listing of the available gains including names, limits, and step sizes?
Do you see any message(s) such as the following in your stderr (log) file? If so could you please post a complete copy?
Code:
sys.stderr.write("gain: name: %s range: start %d stop %d step %d\n" % (name, g_range[0].start(), g_range[0].stop(), g_range[0].step()))Note that the above is a template and that the exact values will vary depending on the SDR model...
Max
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