Linux Build Boatbod Op25

[trimmerj]

Taking first plunge into sdr. Computer doesn't seem to have enough horsepower to run the latest build of Ubantu. Was able to get Linux Mint 19.1 to run, but getting "package not found" errors when installing. Also needs a later build of gnu radio. Is there another version of Linux with less hardware requirements that will fly?
Thanks

 

[wgbecks]

Taking first plunge into sdr. Computer doesn't seem to have enough horsepower to run the latest build of Ubantu.

You shouldn't have any issues installing Mint or Ubuntu and building op25. Are you trying to install and run the Linux OS natively, or are you
attempting to install Linux as a Virtual Machine on a Windows PC?

 

[trimmerj]

Linux OS, no VM.

 

[trimmerj]

So I redid the machine with a later build of Mint and reinstalled op25. I'm now seeing active talk groups. Can someone point me to the procedure to route the sdr audio to the sound card?
Thanks

 

[wgbecks]

Can someone point me to the procedure to route the sdr audio to the sound card?

You'll have to provide a few details if you are looking for help and assistance.

What repo did you install? IE: Boatbod or the Osmocom
What application: IE: rx.py or multi_rx.py

It would be very helpful to post your rx.py command line or json file.

 

[trimmerj]

Using boatbod. RR not allowing attachment of json file. Here's the contents

{
"channels": [
{
"name": "p25",
"device": "",
"demod_type": "cqpsk",
"cqpsk_tracking": true,
"tracking_threshold": 120,
"tracking_limit": 2400,
"tracking_feedback": 0.75,
"destination": "udp://127.0.0.1:56120",
"excess_bw": 0.2,
"filter_type": "rc",
"frequency": 460412500,
"if_rate": 24000,
"plot": "symbol",
"symbol_rate": 4800,
"raw_output": "",
"raw_input": "",
"raw_seek": 0,
"enable_analog": "off",
"nbfm_deviation": 4000,
"nbfm_squelch": -60

},
{
"name": "ysf",
"device": "device_0",
"demod_type": "fsk4",
"cqpsk_tracking": false,
"destination": "file:///tmp/out1.raw",
"excess_bw": 0.2,
"filter_type": "rrc",
"frequency": 460500000,
"if_rate": 24000,
"plot": "datascope",
"symbol_rate": 4800,
"raw_output": "",
"raw_input": "",
"enable_analog": "off",
"nbfm_deviation": 4000,
"nbfm_squelch": -60
},
{
"name": "dmr",
"device": "device_1",
"demod_type": "fsk4",
"cqpsk_tracking": false,
"destination": "udp://127.0.0.1:56122",
"excess_bw": 0.2,
"filter_type": "rrc",
"frequency": 460050000,
"if_rate": 24000,
"plot": "symbol",
"symbol_rate": 4800,
"raw_output": "",
"raw_input": "",
"enable_analog": "off",
"nbfm_deviation": 4000,
"nbfm_squelch": -60
}
],
"devices": [
{
"args": "rtl=0",
"frequency": 460100000,
"gains": "lna:39",
"gain_mode": false,
"name": "device_0",
"offset": 0,
"ppm": 0.0,
"rate": 1000000,
"usable_bw_pct": 0.85,
"tunable": false
},
{
"args": "rtl=1",
"frequency": 464100000,
"gains": "lna:39",
"name": "device_1",
"offset": 0,
"ppm": 0.0,
"rate": 1000000,
"usable_bw_pct": 0.85,
"tunable": true
}
],
"trunking": {
"module": "",
"chans": [
{
"lcn": 1,
"frequency": 111222222,
"cc": 0
},
{
"lcn": 2,
"frequency": 111333333,
"cc": 0
}
]
},
"metadata": {
"module": "icemeta.py",
"streams": [
{
"stream_name": "stream_0",
"meta_format_idle": "[idle]",
"meta_format_tgid": "[%TGID%]",
"meta_format_tag": "[%TGID%] %TAG%",
"meta_format_rid": "@ [%RID%]",
"meta_format_rtag": "@ [%RID%] %RTAG%",
"icecastServerAddress": "your_stream_host_and_port",
"icecastMountpoint": "your_mountpoint_name",
"icecastPass": "your_password",
"icecastMountExt": ".xspf",
"delay": 0.0
},
{
"stream_name": "stream_1",
"meta_format_idle": "[idle]",
"meta_format_tgid": "[%TGID%]",
"meta_format_tag": "[%TGID%] %TAG%",
"meta_format_rid": " @ [%RID%]",
"meta_format_rtag": " @ [%RID%] %RTAG%",
"icecastServerAddress": "your_second stream_host_and_port",
"icecastMountpoint": "your_second_mountpoint_name",
"icecastPass": "your_second_password",
"icecastMountExt": ".xspf",
"delay": 0.0
}
]
},
"audio": {
"module": "sockaudio.py",
"instances": [
{
"instance_name": "audio0",
"device_name": "default",
"udp_port": 23456,
"audio_gain": 1.0,
"number_channels": 1
}
]
},
"terminal": {
"module": "terminal.py",
"terminal_type": "curses",
"#terminal_type": "http:127.0.0.1:8080",
"terminal_timeout": 5.0,
"default_channel": "p25",
"curses_plot_interval": 0.2,
"http_plot_interval": 1.0,
"http_plot_directory": "../www/images",
"tuning_step_large": 1200,
"tuning_step_small": 100
}
}

 

[boatbod]

That's the default cfg.json file, so I'm going to take a guess it's not what you are using to run the app. Please post your command line, and if it starts with ./rx.py, please also post the trunk.tsv file that you are using. Thanks.

 

[trimmerj]

using ./rx.py --args 'rtl' -N 'LNA:47' -S 25000 -q 0 -O hw:1,0 -f 856.7375e6 -o 17e3 -X -T trunk.tsv -V -2 -U 2> stderr-stream0.2

 

[trimmerj]

Changed the control channel. What is the purpose of e6 following the frequency?
Still no audio. Copy of trunk.tsv with ext changed to txt for upload to RR

./rx.py --args 'rtl' -N 'LNA:47' -S 25000 -q 0 -O hw:1,0 -f 851.1375e6 -o 17e3 -X -T trunk.tsv -V -2 -U 2> stderr-stream0.2

 

[trimmerj]

From logfile

using ALSA sound system
audio device: hw:1,0
ALSA lib confmisc.c:165snd_config_get_card) Cannot get card index for 1
failed to open audio device: hw:1,0
Listening on 127.0.0.1:23456
audio closing

 

[boatbod]

Your sample rate is too low (-S 25000). Minimum is generally "-S 1000000"
Also, you generally don't need to specify the destination audio device, so try dropping the "-O hw:1,0".

 

[trimmerj]

Works now. Thanks!!!