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Re: Audio "Feedback"
David Ranch
开云体育Hello Mike, ? I bought a similar looking USB sound device from Adafruit some time ago: ?? Unfortunately, I found the Adafruit unit was creating huge amounts of EMI (strong birdies and broadband noise) on various 2m packet frequencies (144.015Mhz, etc).? As such, I boxed it up and never plan on using it again.? I just dug it out and this is what I see when I connected it to my system: seen run dmesg: -- usb 2-1.3.3: new full-speed USB device number 20 using ehci-pci usb 2-1.3.3: New USB device found, idVendor=0d8c, idProduct=000c usb 2-1.3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 2-1.3.3: Product: C-Media USB Headphone Set input: C-Media USB Headphone Set?? as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3.3/2-1.3.3:1.3/0003:0D8C:000C.0004/input/input20 hid-generic 0003:0D8C:000C.0004: input,hidraw3: USB HID v1.00 Device [C-Media USB Headphone Set? ] on usb-0000:00:1d.0-1.3.3/input3 -- I would recommend you use the recommended Syba SD-CM-UAUD soundcard which uses the CM-119 chipset.? They are known to be reliable, reliably made, are inexpensive, etc.? One of the key issues I've seen with these cheap soundcards is that when they are first introduced on the market, they work.? Then other competitors jump in, copy it, cheapen it up, and the resulting product start to have various quality issues like DOA, intermittent operation, EMI issues due to a lack of proper filtering/shielding, etc.
Ok.. check out that one APRSdroid ticket to make sure you're using rfcomm in a compatible way. --David KI6ZHD |
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Re: Audio "Feedback"
I am not using PA but am using Alsa. PA is uninstalled as well.
These are the cards I'm using in the link below. I have 2 of the same in working order that do not have this issue. I have another card that I'm unsure of the brand that is also fully functional without the issue. It's the new ones that have the issue. If I swap the sound card with the known working ones, the issue goes away. I will get a capture of the cards. The errors in the background were from Xastir, caused by me closing Direwolf. Nothing wrong there. But I'm using Direwolf with APRSDroid over BT on one Pi. But that isn't part of the issue, as I also use Xastir on the same device. |
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Re: Audio "Feedback"
David Ranch
开云体育Hello Mike, Few basic questions: ?? 1. Are you running PulseAudio on your Raspberry PI's?? It's generally not recommended for these low end computers and it's recommended to uninstall it.? ?? 2. When you say you have some soundcards working well and "new same" sound cards that perform poorly.? Which sound devices are these?? Can you swap out a bad unit for a known good unit and prove that the problem follows the sound card? ????? 2.a.? If the problem follows the sound card, capture the output of "sudo lsusb -vvvv" for both the bad and good cards.? Send us the difference here to see if the cards are seen identically or not Ps.? I see you're working with Direwolf here.? Your email here was a bit vague, your screen shot also showed errors with AGW/PE, etc.?? If you're using Bluetooth with Aprsdroid and Direwolf, there was a newer APK posted on the the AprsDroid site addressing some TCP-KISS issues: ?? --David KI6ZHD |
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Audio "Feedback"
I'm using various setups with Direwolf on Raspberry Pi's, but I have some strange audio issues that I haven't had until I got some new sound cards. They are the same as the other I use in my installations without any issues.? So my issue is the input seems to hear everything that's going through the output. Anything I send, is heard and displayed by Direwolf as being heard. Even with nothing plugged in. Only if I mute the mic does the issue go away, but then I can't receive anything. Is there some sort of solution for this issue? Or do I need to toss away my sound card for new ones. |
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Re: Audio Level Indicator
-? ? ? ? ??
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Re: Audio Level Indicator
ill bet im wrong
but what ive gathered its kind of a result of a poll of the decode and you want the yeas/nays to sort of equal the bigger number on the left so if you see 60 31/27 ?thats pretty good ?but 60 15/35 ?thats not so good i hope im wrong ?buts its a fun explanation de k9wkj |
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Re: Smart...CBEACON????
Thanks all?for the input. I think David (KI6ZHD) was the kick in the right direction I needed. For some reason, I was stuck on the Direwolf SMARTBEACON idea, and the Linux AX25 'beacon' just never came to me. Strange thing is, I did something very similar a long time ago on another project. Should be a?fairly straight forward?BASH?script to run a PERL / PYTHON routine to check on the vitals (Temp/voltage/sunlight etc.) and decide what to do from there. I'll dig into this option further when I get a chance. 73, DE VO2GO Glen |
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Re: GNU Radio + Direwolf [1 Attachment]
David Ranch
开云体育Hello Boyan, ? Direwolf can receive input either via: ? - directly via a sound card ? - via an audio stream on a UDP port (what I think you've already done) ? - via a TCP based socket with KISS frames in the payload
Can you play that audio stream from GnuRadio to confirm it's in a compatible format?? Since you've gotten it working via GQRX, you luckily have a good reference
Per , Gqrx sends it's audio stream in:
You need to configure GnuRadio's flowgraph to send the same
format.? Per that document and comments, you should be able to use
Netcat (nc) and say the "sox" program to see what data gnuRadio is
actually sending and then make the required adjustments on
GnuRadio to get it aligned.
Is that FM demodulated *audio* in that WAV file?? it' cannot be I/Q data.? Is it clean, clear flat, audio that's not over driven?? You can use tools like Audacity, Fldigi, baudline, and other tools to look at and play that WAV file to make sure it's roughly ok. --David |
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Re: force beacon
Wed Mar 22, 2017 1:31 pm (PDT) . Posted by:Don't bloat direwolf with this feature. Install ax.25 & use the beacon command in ax25tools. beacon [-c <src_call>] [-d <dest_call>[digi ..]] [-l] [-m] [-s] [-t interval] [-v] port "message" /Basil |
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GNU Radio + Direwolf
Hello everyone, I am trying to connect GNU Radio to Direwolf through UDP sockets. My idea is to first receive the data from GNU Radio and decode it with Direwolf. Once that is done, I would like to transmit APRS as well using Direwolf as the packet generator, and GNU Radio to receive those packets and send them to the SDR attached to the computer. So far, I have been able to receive the data from gqrx thourgh a UDP socket. However, when I try to do the same with GNU Radio, Direwolf won't decode anything.? You can see the diagram in the attached picture "gnu_radio.png". The .wav file that it is calling is a recording of a APRS packet. When that diagram is running, if I do "nc -l -u 7355" I can see lots of data coming in. Now I start direwolf like "direwolf -r 44100 udp:7355".? It will stay in its initial state;
I don't understand why it is not decoding the data. Someone has any idea? I would really appreciate your help! 73 from EA3HXM. ? |
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Re: Bluetooth SPP w/ APRSDroid
Solved it after some research and figuring out where the packets were being lost.?
The command needs to be in raw format for rfcomm. So instead, run this command and everything works perfectly, "sudo rfcomm --raw watch /dev/rfcomm0 22 socat tcp4:127.0.0.1:8001?/dev/rfcomm0" |
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Re: force beacon
David Ranch
开云体育I suppose it depends on what he wants to "beacon".? If it's an APRS sentence with location, it's not all that simple.?? If it's just a string of text, yes, it might be pretty simple.? It then depends on the other details that the user didn't specify like what operating system is he running, is it running on X86, ARM, etc?. --David KI6ZHD |
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Re: force beacon
Hello. Its posible force send a beacon with a key? (example: F9 in ui-view).When I was first getting DIREWOLF running I wanted to be able to send beacons on demand like this. I ended up using the UZ7HO simple-term program. It has a transmit button and it's easy to change the outgoing path. It also connects directly to DIREWOLF with the KISS-on-TCP protocol. This was on Windows for both SimpleTerm and DIREWOLF. 73 Bill, WA7NWP |
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Re: force beacon
David Ranch
开云体育Hello , I like your idea but direwolf is really more of a background application than a foreground application (like UI-View).? As such, I don't think offering a hotkey like F9 would make sense.? What might be possible is to send it a UNIX signal to tell the running Direwolf process to send a status beacon, a different signal for a telemetry beacon, etc. without exiting.? Anyway, please file an "issue" on the Direwolf github page: ?? so this can be considered and tracked. --David KI6ZHD On 03/22/2017 01:31 PM,
flopyplus@... [direwolf_packet] wrote:
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Re: Smart...CBEACON????
If I follow what you're saying correctly... you want telemetry beacons for various data of your system to be varied by what's happening? Sounds more complicated than one would want. I use telemetry for my solar setup showing every bit of data possible from each part of the system, along with weather. It beacons every 10-30 minutes. It's just easier this way. Unless you're a programming guru.
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Basil Gunn