Re: APRS + 48000 sample rate

A higher audio sample rate provides no benefit for 1200 bps.

Perfect, that's just what I was looking for. We have a decent enough CPU in this machine so I'll just leave it at 44.1k and skip the down-sampling. Thank you!

Unless there is something specific you need from v1.7, it's recommended to run the released v1.6.

For software with longer release cycles I usually prefer to build latest. Though In this case specifically I had no choice as I require?CM119 GPIO PTT on Windows.

Re: APRS + 48000 sample rate

#5820

That note explicitly refers to 9600 bps.

A higher audio sample rate provides no benefit for 1200 bps.

You can use -D2 or -D3, on the command line, to down-sample the audio rate before demodulating.? This greatly decreases the CPU requirements with little impact on the decoding performance.?? This is useful for a slow ARM processor, such as with a Raspberry Pi model 1.

Re: Fe Pi

#5819

开云体育

just pins 1,2,3,5,6,12,35,38,40 ... after you do that many, you kinda get in a rhythm, and the rest fall into place.

-craig
KM6LYW

On 11/16/21 4:02 PM, J K via groups.io wrote:

Show quoted text

Ok,

Guess I’ll order a new iron. ?Need one anyway

11 Max Pro

On Nov 16, 2021, at 6:55 PM, David Ranch <direwolf-groupsio@...> wrote:
?
Does the Fe Pi (remake) come with the GPIO pins already soldered on?  Not that I’m adverse to soldering, but if not I’ll need to buy a new iron too as mine is shot.
Doesn't look like it.? Look at slide 21 where they tell you to solder the pins on

??

--David

Re: Fe Pi

#5818

开云体育

Ok,

Guess I’ll order a new iron. ?Need one anyway

11 Max Pro

Show quoted text

On Nov 16, 2021, at 6:55 PM, David Ranch <direwolf-groupsio@...> wrote:

?
Does the Fe Pi (remake) come with the GPIO pins already soldered on?  Not that I’m adverse to soldering, but if not I’ll need to buy a new iron too as mine is shot.
Doesn't look like it.? Look at slide 21 where they tell you to solder the pins on

??

--David

Re: RFI issues with RPi3B+

#5817

开云体育

Ok,

Guess I’ll order a new iron. ?Need one anyway.

11 Max Pro

Show quoted text

On Nov 16, 2021, at 6:46 PM, John Tetreault (WA1OKB) <john.h.tetreault@...> wrote:

?
I'm using the Pi Audio Injector Zero and it works great with Direwolf.

On Wed, Oct 6, 2021, 8:09 PM J K via <kuhnje=[email protected]> wrote:
I still to try the Fe-Pi clone hat, but bought a cheap Sabrebt (one with volume control on it and you can turn headphone and mic off by buttons).? Have four cheap Sabrent USB audio, plus this one now.? No Linder having any RFI issues.? Might just continue using Sabrent witty controls.? I like that just a push of button can turn iGate off or difioeater off, while keeping other running.

11 Max Pro

> On Sep 13, 2021, at 4:19 PM, J K via <kuhnje=[email protected]> wrote:
>
> ?Have the hats coming now, which I’m sure will wire fine.? I’ll probably use the one that is similar to the Fe-Pi and around with the Audio injector for something else.
>
> Also, found this USB audio adapter in one of my junk drawers that I totally forgot about.? If picture can’t be posted here, it’s one of those USB audio adapters that has about a 4” USB cable, then has a volume dial on the adapter itself, plus buttons turn on/off the speaker or microphon independent.? It’s working and is kind of cool because it’s another point to adjust volume (found it works well to use dongle knob to make fine adjustments), plus the button switches are pretty cool if you, say, want to turn off the digipeter but still have iGate running (or vice-versa).? Found my RFI issue really wasn’t much of an issue anyway now that I’m connected to an outdoor antenna (Diamond V2000A).? Very cool.? I’d say with the dongles, it’s seems about 99% solidrbut expect with a hat it to be 100^.? ?:-)
>
>
>
> Sent from my iPhone 11 Max Pro
>
>
>
>
>

Re: Fe Pi

#5816

开云体育

Does the Fe Pi (remake) come with the GPIO pins already soldered on?  Not that I’m adverse to soldering, but if not I’ll need to buy a new iron too as mine is shot.

Doesn't look like it.? Look at slide 21 where they tell you to solder the pins on

??

--David

Fe Pi

#5815

Hi,

Does the Fe Pi (remake) come with the GPIO pins already soldered on?  Not that I’m adverse to soldering, but if not I’ll need to buy a new iron too as mine is shot.

Thanks 

Sent from my iPhone 11 Max Pro

Re: RFI issues with RPi3B+

#5814

I'm using the Pi Audio Injector Zero and it works great with Direwolf.

Show quoted text

On Wed, Oct 6, 2021, 8:09 PM J K via <kuhnje=[email protected]> wrote:

I still to try the Fe-Pi clone hat, but bought a cheap Sabrebt (one with volume control on it and you can turn headphone and mic off by buttons).? Have four cheap Sabrent USB audio, plus this one now.? No Linder having any RFI issues.? Might just continue using Sabrent witty controls.? I like that just a push of button can turn iGate off or difioeater off, while keeping other running.

11 Max Pro

> On Sep 13, 2021, at 4:19 PM, J K via <kuhnje=[email protected]> wrote:
>
> ?Have the hats coming now, which I’m sure will wire fine.? I’ll probably use the one that is similar to the Fe-Pi and around with the Audio injector for something else.
>
> Also, found this USB audio adapter in one of my junk drawers that I totally forgot about.? If picture can’t be posted here, it’s one of those USB audio adapters that has about a 4” USB cable, then has a volume dial on the adapter itself, plus buttons turn on/off the speaker or microphon independent.? It’s working and is kind of cool because it’s another point to adjust volume (found it works well to use dongle knob to make fine adjustments), plus the button switches are pretty cool if you, say, want to turn off the digipeter but still have iGate running (or vice-versa).? Found my RFI issue really wasn’t much of an issue anyway now that I’m connected to an outdoor antenna (Diamond V2000A).? Very cool.? I’d say with the dongles, it’s seems about 99% solidrbut expect with a hat it to be 100^.? ?:-)
>
>
>
> Sent from my iPhone 11 Max Pro
>
>
>
>
>

Re: APRS + 48000 sample rate

#5813

开云体育

Hello Jason,

I've never observed any benefit or performance impacts of of 48k vs. 44.1k sampling rates as long as your soundcard offers that sampling rate NATIVELY.? I don't recommend you enable any form of sampling rate interpolation at the ALSA layer though.? To see what your sound device's natively supports, run:

?? bash <(wget -q -O - ) -s

There, you should see output something like this:

?1) USB Audio Class Digital alsa audio output interface `hw:0,0'
?- device name?????? = CODEC??????????????????????????????????????????????????????
?- interface name??? = USB Audio??????????????????????????????????????????????????
?- usb audio class?? = (n/a)??????????????????????????????????????????????????????
?- character device? = /dev/snd/pcmC0D0p??????????????????????????????????????????
?- samplerates (Hz)? = S8:32000,44100,48000 <---------------------------------------- ?????????????????????????????????????
?????????????????????? S16_LE:32000,44100,48000???????????????????????????????????
?????????????????????? U8:32000,44100,48000???????????????????????????????????????
?- monitor file????? = /proc/asound/card0/pcm0p/sub0/hw_params????????????????????
?- stream file?????? = /proc/asound/card0/stream0????

??

It's worth noting that on page 64 the Direwolf User guide states:

?? ARATE sample-rate

????? Where,sample-rate is number of audio samples per second.
? ? ?? The default is 44100. Other standard values are 22050 and 11025.
????? When using 9600 bps data, a 48000 sample rate might provide some
????? improvement.

????? When using a normal audio interface (built in to motherboard or USB adapter),
????? it?s generally best to take the default.

????? This would be necessary when using a software defined radio which tend to use
????? rates like 48000 or 24000. This can also be specified on the command line for
????? the first device only.

It's interesting you're seeing this warning on Direwolf v1.7 (aka "dev" branch)? but please remember that is NON-released ALPHA level code.? It might work.. it might not.? Unless there is something specific you need from v1.7, it's recommended to run the released v1.6.

--David
KI6ZHD

On 11/16/2021 09:15 AM, Jason Schollenberger wrote:

Show quoted text

Hi,

I plan to use Direwolf with a DRA-45 for an APRS station. I'm wondering if 1200bps / APRS would benefit from a 48k sample rate versus 44.1k. I set the flag (-r 48000) on 1.7 B (Oct 26 2021) and it warned me:

Calculated pre filter size of 417 is too large.

Decrease the audio sample rate or increase the decimation factor or

recompile the application with MAX_FILTER_SIZE larger than 404.

I'm going to recompile either way to get rid of the?IL2P header message but will just leave the MAX_FILTER_SIZE?alone if it won't make any difference. I'm not sure how one would "increase the decimation factor" if that is an easier approach.

Thanks!

Jason

Timestamps etc

#5812

Within the various Beacon types are there any options to include things like timestamps in the Comments section??

APRS + 48000 sample rate

#5811

Hi,

I plan to use Direwolf with a DRA-45 for an APRS station. I'm wondering if 1200bps / APRS would benefit from a 48k sample rate versus 44.1k. I set the flag (-r 48000) on 1.7 B (Oct 26 2021) and it warned me:

Calculated pre filter size of 417 is too large.

Decrease the audio sample rate or increase the decimation factor or

recompile the application with MAX_FILTER_SIZE larger than 404.

I'm going to recompile either way to get rid of the?IL2P header message but will just leave the MAX_FILTER_SIZE?alone if it won't make any difference. I'm not sure how one would "increase the decimation factor" if that is an easier approach.

Thanks!

Jason

Re: RFI issues with RPi3B+

#5810

In addition to this, I would look at rebuilding the machine with a new SD card. I have had a lot of "odd" symptoms over the years because of it.
More recently, I built an Odroid C4 with the latest Ubuntu 20.04 (headless) image and when direwolf was run with a configuration for HF (modem 7@30), it would peg the CPU at 100% and throw audio errors.
This really did my head in, as I have a 2014 vintage Odroid U3 that is running direwolf 1.5 (the first version was 0.9!!!) on ubuntu 18.04 LTS configured as a Rx only Igate.
Using the same HF config, its CPU sits around 30% and has been running near enough to non-stop since 2015 (ish) and is still using the original 8G eMMC card!!!!
After many, many days of trying different things (removing GPSD, udev rules, etc), I bit the bullet and rebuild with an image that was 6 months(ish) older and it is now working flawlessly.
The rebuild process was identical, so I'm assuming there was a "feature" in the latest disk image.
My point being is there are a lot of direwolf versions out in the wild running on a lot of different platforms and the OS and hardware play a significant role in the stability and reliability of all programs that run on them.

Ian
VK1IAN

Show quoted text

On 17/11/21 12:29 am, Skyler Fennell wrote:
I would encourage you to try it without any radio or RF connected.
Have it send lots of packets out all day and see if anything happens.
In my case it did crash but probably due to it being raspbian Jessie on a slightly older version of direwolf . I need to rebuild my setup with all the latest?updates
On Tue, Nov 16, 2021 at 6:22 AM kt67 <kt4wo67@... <mailto:kt4wo67@...>> wrote:
"I'm 99% sure your issues are local to your setup and not Direwolf as a general statement."
I must agree, and I say 100%
    I have DW on a Mtn. top node that has been running for almost a year
    with NO resets and I use a USB soundcard setup(Masters Comm.? RL-20)
Just because ALStar handles USB errors better does not mean it's a
    "bug" in DireWolf.
KT4WO

Re: Direwolf SMARTBEACON

#5809

Thanks John and David,
	My current solution is to run 2 instances of direwolf with different config file. This is working well on the bench so an enhancement is not critical.
	I'll report this as an issue in the coming days.

Ian

Show quoted text

On 17/11/21 5:41 am, WB2OSZ wrote:
You are both correct.? The SMARTBEACON parameters are global, not separate for each radio channel.
Please open an issue so this will be considered as a future enhancement.

Re: Direwolf SMARTBEACON

#5808

You are both correct.? The SMARTBEACON parameters are global, not separate for each radio channel.
Please open an issue so this will be considered as a future enhancement.

Re: Direwolf SMARTBEACON

#5807

开云体育

Hell Ian,

The best I can tell, the mixture of different SMARTBEACON timing schedulers to be applied to different TBEACON entries isn't supported.? If this is something you feel is really needed, you might consider filing an "issue" on the Direwolf Github page to see if it can be added in the future.

--David

On 11/15/2021 06:41 PM, VK1IAN wrote:

Show quoted text

Good Afternoon,
????I'm experimenting with using direwolf as a APRS tracker with 2 radios (HF and VHF).
????I would like to have different SMARTBEACON settings for each radio (i.e channel), but all the examples I can find only have the one SMARTBEACON statement.
????From my initial experiments, I can only get the one SMARTBEACON settings applied to both channels.
????I've tried putting the SMARTBEACON statement inside the channel properties and also immediately below the TBEACON settings. Both methods apply the last encountered SMARTBEACON settings to both channels.
????Guidance appreciated.

Ian
VK1IAN

Re: RFI issues with RPi3B+

#5806

I would encourage you to try it without any radio or RF connected.?

Have it send lots of packets out all day and see if anything happens.

In my case it did crash but probably due to it being raspbian Jessie on a slightly older version of direwolf . I need to rebuild my setup with all the latest?updates

Show quoted text

On Tue, Nov 16, 2021 at 6:22 AM kt67 <kt4wo67@...> wrote:

"I'm 99% sure your issues are local to your setup and not Direwolf as a general statement."

I must agree, and I say 100%
I have DW on a Mtn. top node that has been running for almost a year
with NO resets and I use a USB soundcard setup(Masters Comm.? RL-20)

Just because ALStar handles USB errors better does not mean it's a?
"bug" in DireWolf.

KT4WO

Re: RFI issues with RPi3B+

#5805

"I'm 99% sure your issues are local to your setup and not Direwolf as a general statement."

I must agree, and I say 100%
I have DW on a Mtn. top node that has been running for almost a year
with NO resets and I use a USB soundcard setup(Masters Comm.? RL-20)

Just because ALStar handles USB errors better does not mean it's a?
"bug" in DireWolf.

KT4WO

Direwolf SMARTBEACON

#5804

Good Afternoon,
	I'm experimenting with using direwolf as a APRS tracker with 2 radios (HF and VHF).
	I would like to have different SMARTBEACON settings for each radio (i.e channel), but all the examples I can find only have the one SMARTBEACON statement.
	From my initial experiments, I can only get the one SMARTBEACON settings applied to both channels.
	I've tried putting the SMARTBEACON statement inside the channel properties and also immediately below the TBEACON settings. Both methods apply the last encountered SMARTBEACON settings to both channels.
	Guidance appreciated.

Ian
VK1IAN

Re: How to use Direwolf with multiple clients and multiple radios?

#5803

Well...? Looks like that did the trick.? I got WINLINK and YAAC to operate independently on the same RPi DW (server) using KISS TCP.? Thanks a lot for your assistance!

--73 de N1OBU (Doug)

Re: How to use Direwolf with multiple clients and multiple radios?

#5802

Well, I found a Pi here at work and had a uSD with the needed configuration.
I tried this and it worked as discussed.

NOTE:??/g/direwolf/message/4925?
? ?This message says that AGW is only 1 port, but TCP/IP can be split between devices.

Rob KB8RCO