Date   

Digimode help

Randy Davenport ka4nma
 

I would like to use a raspberry pi for digital modes. I'm disabled and low income. Does anybody have an extra rbpi set up I can get)
Randy


Re: W3DJS Raspberry Pi Ham Radio Image v2.0 Released

David [kg5eiu]
 

I just now got the W3DJS image booted on a pi4 and have added a GPS Puck from Amazon
a Summitlink Vk-162 and after some initial setup and expanding the file system, rename etc.
I am seeing this below - does this look correct ?


Dire Wolf Telemetry on RPi3

Jon Adams
 

Happy 2020, all, and greetings from Jon N7UV in Phoenix!

I have been running Dire Wolf on an RPi3+, with gpsd, and a Baofeng UV5R with W1GX's nice ptt circuit. The RPi gets accurate time from a little uBlox NEO7 connected to the RPI serial port. Everything runs off 12 vdc unregulated, and I use a buck regulator inside the battery case of the UV5 to get 8 Vdc, and another buck to get the operating voltage for the RPi. Whole thing runs off a 12 Vdc solar panel and a 20 AH gel cell. Typical power draw is 3.7 w receiving, with open squelch. It has been absolutely stable for months now. Kudos to John WB2OSZ for a nice bit of coding!

Now, what I want to do is add the ability for the RPi to collect some telemetry (a few I/O bits, 2 analog voltage values, and 2 DS1820 temperature values, and send them as telemetry packets. I think I've finally gotten the gist of what John's telemetry toolkit suggests, but would really like to be lazier and see if someone else has already done something and can share. I ordered one of the Adafruit ADS1015 4-channel ADCs, and have some DS1820s.

Any people out there who've already forged a path? 

Cheers and 73 - Jon N7UV


Seeking insights -- trying to get IC7300 to transmit Ardop via PAT

Jonathan Scherch
 

Hello from Seattle. I am running Ardop and Pat on a RPi3B+ / Buster, and cant seem to get my 7300 to transmit.

Ardop is sending KeyPTT commands (True and False), and listening on local 8515. I see waterfall action via ArdopGUI, but rig does not trigger for transmit. I can share my PAT configure file if helpful. I am running FLrig in background as well.

I found this link for more info: http://www.cantab.net/users/john.wiseman/Documents/ARDOPC.html
 
Note this section (about halfway down):

"The TNC supports a number of options for PTT. When using the TCP interface it will send commands to the host to allow it to contol PTT. This is most useful when the host program is running more than one sound card mode (eg ARDOP and WINMOR). The TNC can also key the radio via a hardware or software (CAT) interface. There are a number of optional command line parameters to control like this: "

-p device or --ptt device         Device to use for PTT control using RTS or GPIO Pin (Raspbery Pi only)
-c device or --cat device         Device to use for CAT Control

I am trying to use "--ptt" or "--cat" like this: "./piardopc 8515 plughw:1,0 plughw:1,0 --cat device" but I cant figure ourt what "device" should be.

Any advice is welcome. Thanks and 73.

Jonathan, KK7PW



Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)n

Daniel Holmes
 

I have to say that link was one of the best reads I’ve had tonight. I knew 9600 baud was only possible with certain setups but could never say exactly why. Thanks for sending that along. 

Dan

--
. Please pardon any mispelings or errors.


On Dec 31, 2019, at 10:28 PM, Eric <vzwengr@...> wrote:


I don't think a transformer will pass a signal of a few Hz without doing weird things to the signal's waveform.


Thank you for including the link. I had not read that before.  That was interesting to read.


The State of Confusion...that's where I got my driving license.  :-)

Eric.




Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)n

Eric
 

I don't think a transformer will pass a signal of a few Hz without doing weird things to the signal's waveform.


Thank you for including the link. I had not read that before. That was interesting to read.


The State of Confusion...that's where I got my driving license. :-)

Eric.


Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Michael WA7SKG
 

And yet the previously referenced article ( https://www.amsat.org/amsat/articles/g3ruh/109.html) says:

"One is that the channel is not DC coupled. It could never be so in an FM system unless one could guarantee both transmitter and receiver were always exactly on frequency and had no drift. As this is virtually impossible to achieve, one simply AC couples the channel, i.e. gives it a response down to a few Hz, and exploits the feature of the randomised data that it has a negligible DC component."

I always thought AC coupling was often via a transformer.

That's okay, I'm a native of the State of Confusion.

I'll crawl back under my rock now.

Michael WA7SKG



Eric wrote on 12/31/19 8:31 PM:

I think I remember reading that 9600 bps requires DC coupling to the modulator.
Transformer coupling would be a problem if that is the case.
Eric
WB6TIX
On Tue, Dec 31, 2019, 20:48 Michael WA7SKG <wa7skg@... <mailto:wa7skg@...>> wrote:
"the Signalink will not work at the higher speed because it has
transformers in the audio chain."
Huh?? It is audio. Maybe a greater bandwidth due to the speed, but
audio
nonetheless. Entertainment system audio often goes over 15 kHz through
transformers. I would be interested in understanding why the Signalink
cannot do the higher speeds because it has transformers. I always like
to learn new things.
Michael WA7SKG
Bill Vodall wrote on 12/31/19 4:13 PM:
>
> The DRAWS board is designed for 9600 baud which most other sound card
> interfaces won't handle.  In particular, as handy as it is, the
> Signalink will not work at the higher speed because it has
> transformers in the audio chain.
>


Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Eric
 

I think I remember reading that 9600 bps requires DC coupling to the modulator.

Transformer coupling would be a problem if that is the case.

Eric
WB6TIX

On Tue, Dec 31, 2019, 20:48 Michael WA7SKG <wa7skg@...> wrote:
"the Signalink will not work at the higher speed because it has
transformers in the audio chain."

Huh?? It is audio. Maybe a greater bandwidth due to the speed, but audio
nonetheless. Entertainment system audio often goes over 15 kHz through
transformers. I would be interested in understanding why the Signalink
cannot do the higher speeds because it has transformers. I always like
to learn new things.

Michael WA7SKG

Bill Vodall wrote on 12/31/19 4:13 PM:
>
> The DRAWS board is designed for 9600 baud which most other sound card
> interfaces won't handle.  In particular, as handy as it is, the
> Signalink will not work at the higher speed because it has
> transformers in the audio chain.
>




Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Ray Wells
 

In simple terms 9600 is not audio tones, it's a data switching rate (actually at 4800 and doubled in the process) . For 9600 the frequency response of the signal chain is ideally down to a DC response which of course won't pass through a transformer. One of the "fathers of 9600 packet was James Miller G3RUH who produced various modems. His writings on 9600 are worth a read for some detail about what works and what doesn't. Try this for starters https://www.amsat.org/amsat/articles/g3ruh/109.html

HTH
Ray vk2tv

On 1/1/20 3:02 pm, Daniel Holmes wrote:
It’s always been my understanding it’s not the transformers that are the problem, it’s where the audio is injected—if it’s injected in the mic input then you are limited to 1200 baud, but if you inject elsewhere (the IF? I can’t remember) the you can get 9k6. A lot of modern radios have inputs for data that take 9k6. I think any soundcard can connect to those inputs for higher baud rates via direwolf. The signalink and other specialized cards I think have optical isolators that isolate from the computer. ‘Course it is NYE, and I could be all wrong due to that. 

Dan

--
. Please pardon any mispelings or errors.


On Dec 31, 2019, at 8:48 PM, Michael WA7SKG <wa7skg@...> wrote:

"the Signalink will not work at the higher speed because it has transformers in the audio chain."

Huh?? It is audio. Maybe a greater bandwidth due to the speed, but audio nonetheless. Entertainment system audio often goes over 15 kHz through transformers. I would be interested in understanding why the Signalink cannot do the higher speeds because it has transformers. I always like to learn new things.

Michael WA7SKG

Bill Vodall wrote on 12/31/19 4:13 PM:

The DRAWS board is designed for 9600 baud which most other sound card
interfaces won't handle.  In particular, as handy as it is, the
Signalink will not work at the higher speed because it has
transformers in the audio chain.





Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Daniel Holmes
 

It’s always been my understanding it’s not the transformers that are the problem, it’s where the audio is injected—if it’s injected in the mic input then you are limited to 1200 baud, but if you inject elsewhere (the IF? I can’t remember) the you can get 9k6. A lot of modern radios have inputs for data that take 9k6. I think any soundcard can connect to those inputs for higher baud rates via direwolf. The signalink and other specialized cards I think have optical isolators that isolate from the computer. ‘Course it is NYE, and I could be all wrong due to that. 

Dan

--
. Please pardon any mispelings or errors.


On Dec 31, 2019, at 8:48 PM, Michael WA7SKG <wa7skg@...> wrote:

"the Signalink will not work at the higher speed because it has transformers in the audio chain."

Huh?? It is audio. Maybe a greater bandwidth due to the speed, but audio nonetheless. Entertainment system audio often goes over 15 kHz through transformers. I would be interested in understanding why the Signalink cannot do the higher speeds because it has transformers. I always like to learn new things.

Michael WA7SKG

Bill Vodall wrote on 12/31/19 4:13 PM:

The DRAWS board is designed for 9600 baud which most other sound card
interfaces won't handle.  In particular, as handy as it is, the
Signalink will not work at the higher speed because it has
transformers in the audio chain.




Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Michael WA7SKG
 

"the Signalink will not work at the higher speed because it has transformers in the audio chain."

Huh?? It is audio. Maybe a greater bandwidth due to the speed, but audio nonetheless. Entertainment system audio often goes over 15 kHz through transformers. I would be interested in understanding why the Signalink cannot do the higher speeds because it has transformers. I always like to learn new things.

Michael WA7SKG

Bill Vodall wrote on 12/31/19 4:13 PM:


The DRAWS board is designed for 9600 baud which most other sound card
interfaces won't handle. In particular, as handy as it is, the
Signalink will not work at the higher speed because it has
transformers in the audio chain.


Re: Getting started with the W3DJS V2 image

David KD4E <dcolburn@...>
 

It my case it proved far more simple to just boot Buster Raspian,
open the Browser, then download and install the apps I needed.

For some reason trying to get things to play together nicely with
the W3DJS package just didn't work.

HTH, YMMV ...

KillHotspot case sensitive. Killing the hotspot only makes the Wired interface work properly.

 

Brian N2KGC




Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

Ed K6ESS
 

Tad came pretty close to a "Santa's wish list" card. I could pass on all the data logging, but all else is spot on. Santa, can you come thru with a late Christmas gift?

Ed K6ESS
Sacramento CA

Make everything as simple as possible,  but not simpler.  Albert Einstein

On Tue, Dec 31, 2019, 16:14 Bill Vodall <wa7nwp@...> wrote:
> Not, yet, interested in 1200 baud, especially at $150.

The DRAWS board is designed for 9600 baud which most other sound card
interfaces won't handle.  In particular, as handy as it is, the
Signalink will not work at the higher speed because it has
transformers in the audio chain.

DRAWS has suggested it will work at 19,200 but I'm waiting for them to
demo that - preferably with iPerf numbers...

Bill




Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

 

Not, yet, interested in 1200 baud, especially at $150.
The DRAWS board is designed for 9600 baud which most other sound card
interfaces won't handle. In particular, as handy as it is, the
Signalink will not work at the higher speed because it has
transformers in the audio chain.

DRAWS has suggested it will work at 19,200 but I'm waiting for them to
demo that - preferably with iPerf numbers...

Bill


Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

 

Patience maties.   Don’t knock anybody making a product which is pretty much exclusively for ham radio ops.  Hams are NOT that great of a market place.  We need all that we can get.  

The DRAWS is pretty cool if you want to be doing APRS stuff with Direwolf.  

I acknowledge that it doesn’t address the 12v backup power thing we’ve been talking about.  
This is my wishlist for a Raspberry PI backup and power control system:
  • Runs a Raspberry PI 3B, 3B+ or 4B @5.1vDC 
  • It is powered by a 11.5vDC to 15vDC mains/primary power source.  
  • Powered using Anderson PowerPole connection.
  • Provides backup power to the Raspberry PI with instant switchover if the primary power source goes below 11.5v (maybe configurable?)
  • It should have an on/off button or toggle to do a safe shutdown of the Raspberry PI.  
  • It should know if we turned off the PI using an external switch, that the PI should stay off until we turn it on, even of the main power and secondary power are removed and re-applied.   A toggle switch input is ideal for this since it has a real “OFF” state. 
  • Uses an unspecified battery for backup power, given some reasonable battery voltage (6.5v to 15v?).  
  • Supports an unspecified external charger for any particular battery and can remove the charger from the circuit when the battery is discharging.  
  • It should be configurable to do a self-declared Raspberry Pi shutdown if the battery backup battery goes below the configured voltage, and then return the Raspberry PI to powered-up only if the mains/PRIMARY source is present for a configured length of time. 
  • It should be able to tell us how l long the power was off for, and let us read the voltage of either mains/PRIMARY or battery input in real time.
  • It would be nice if it could log the voltage on each power input periodically whenever the switch is ON, regardless of whether running on primary/mains or battery.  Perhaps the log would increase the time between readings logarithmically if it runs out of memory space?  
  • It should have some RF immunity features built in, including ground-plane, a large tinned-thru-hole screw-hole for #4 screw to ground the unit, and maybe provision to insert ferrite beads and bypass caps in off-the-board circuits?  
  • It should be almost free (haha)
There aren’t many points not covered by the MOPI.  

I’m not particularly wedded to having a shield card/hat for a Raspberry PI.  I find the physical mounting of such units to be sloppy and access to switches, variable controls, and LEDs on stacked boards is difficult.  I’d prefer using a 6” USB cable, but I acknowledge the additional expense and in-circuit loss of such a thing.  
   Tadd / KA2DEW
   Raleigh NC




On Dec 30, 2019, at 12:30 PM, Daniel Holmes <danielh@...> wrote:

Eh, considering all that it does and the convenience factor I don’t think $150 is all that outrageous. I already have a Pi-TNC, Signalink, GPS puck, and the Mo-Pi, so it’s superfluous for me. The Mo-Pi handled my power requirements (namely multiple inputs and charging circuitry) better than the DRAWS HAT. Although it would be very convenient to have everything in one package.

Dan
--
Daniel Holmes, danielh@...
"Laugh while you can, monkey boy!" -- Lord John Whorfin


On Dec 30, 2019, at 10:22 AM, Michael WA7SKG <wa7skg@...> wrote:

Thanks for the suggestion, but I am not going to spend another $150+ for more hardware that is less capable than what I already have to do the work of a $7 buck-boost module.

Michael WA7SKG

John D Hays - K7VE wrote on 12/30/19 8:48 AM:
For Amateur Radio use, be sure to look at the DRAWS™ <http://www.nwdigitalradio.com/draws> board: 9-15 VDC input supply, sound card, dual radio interfaces, GPIO pin extensions, GPS (w/battery backed clock) -- all integrated into a Raspberry Pi HAT.
http://nwdigitalradio.com/shop/
--
John D. Hays
Kingston, WA
K7VE









Re: 12V Power for the Pi (was Re: [RaspberryPi-4-HamRadio] Getting back to the RPi)

chuck gelm <rpi4ham@...>
 

On 12/30/19 12:22 PM, Michael WA7SKG wrote:
Thanks for the suggestion, but I am not going to spend another $150+ for more hardware that is less capable than what I already have to do the work of a $7 buck-boost module.

Michael WA7SKG

+1

Not, yet, interested in 1200 baud, especially at $150.

...what I already have to do the work of a $50 single band, modem, transceiver, antenna, POE powered, outdoor rated, up to 144.4 Mbps, automatic-adaptive networking,

:-|

But, I love the Raspberry Pi. :-)

Chuck


Re: Getting started with the W3DJS V2 image

Brian Webster
 

KillHotspot case sensitive. Killing the hotspot only makes the Wired interface work properly.

 

Brian N2KGC

 

From: RaspberryPi-4-HamRadio@groups.io [mailto:RaspberryPi-4-HamRadio@groups.io] On Behalf Of Tim Carroll
Sent: Tuesday, December 31, 2019 3:28 AM
To: RaspberryPi-4-HamRadio@groups.io
Subject: Re: [RaspberryPi-4-HamRadio] Getting started with the W3DJS V2 image

 

On Mon, Dec 16, 2019 at 07:51 AM, Joe Spears wrote:

wpa_supplicant.conf 

where is this file located at on pi?I am having troubles getting wifi to work also used killhotspot but still did not work



Thanks
Tim
KE4HGP


Re: Getting started with the W3DJS V2 image

Larry Greenwald
 

Hi Tim,

pi@rpi3:~ $ locate wpa_supplicant.conf
/etc/wpa_supplicant/wpa_supplicant.conf

Larry
WB0SIO

On 12/31/19 2:27 AM, Tim Carroll wrote:
On Mon, Dec 16, 2019 at 07:51 AM, Joe Spears wrote:
wpa_supplicant.conf 
where is this file located at on pi?I am having troubles getting wifi to work also used killhotspot but still did not work



Thanks
Tim
KE4HGP


Re: Getting started with the W3DJS V2 image

rx@...
 

Hi

Mine is...

etc/wpa_supplicant/wpa_supplicant.conf

Regards

MarK
G6JVY


Re: Getting started with the W3DJS V2 image

Tim Carroll
 

On Mon, Dec 16, 2019 at 07:51 AM, Joe Spears wrote:
wpa_supplicant.conf 
where is this file located at on pi?I am having troubles getting wifi to work also used killhotspot but still did not work



Thanks
Tim
KE4HGP