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New VARA HF Modem Works With UIview - Huge Improvement Over AX.25 Packet


 

[This is an account of making the high-performance VARA HF data modem work with UIview, as an alternative to classic 300-baud AX.25 packet on HF.]

After spending nearly the entire New Year's 3-day weekend twiddling TCP/IP settijngs, serial port emulators, sound card drivers, etc,?? I now have the VARA high-performance HF soft-modem working with the UIview program to transmit far more robust HF APRS than classic AX.25 packet.

I am using a stack of components from "VSPE" (Virtual Serial Ports Emulator) to create a serial-to-TCPIP bridge to connect the serial-only KISS output of UIview to the network (TCP/IP) KISS connection provided in the VARA soft-modem.

For nearly 40 years, HF APRS has used classic 300-baud 200-Hz-shift HF packet (mostly on 30 meters) as it's transport layer. However, packet is a /horrible/ mode on HF with poor immunity to noise and HF selective fading. I've been using the "UZ7HO Soundmodem" soundcard "soft TNC" (arguably the best HF packet TNC - hardware or software) for this purpose. However, it still falls far short of modes like MFSK16 or PSK63 for weak-signal-plagued-with-multipath? data operation.

For about two years, I have been experimenting with using FLdigi as a KISS modem for HF APRS on both 30 and 60 meters.? 60 meters tends to be a noisy band, putting a premium on data modes that can perform error-free at low signal-to-noise ratios.? My web site about this is here:

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Over the weekend of the 6th and 7th of January , I conducted a road test comparing the performance of APRS over traditional HF 300-baud AX.25 packet? vs? APRS using the VARA modem on 60 meters.? This was a 500-mile / 800 Km round-trip from central Michigan (East Lansing area) to west suburban Chicago and back. VARA was overwhelmingly superior - by least an order of magnitude!

The full details, including a brief background on VARA, are on a new page on my web site at:

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-------------------------------------------------------------------------------
Stephen H. Smith??? wa8lmf (at) aol.com
Skype:??????? WA8LMF
EchoLink:? Node #? 14400? [Think bottom of the 2-meter band]
Home Page:

-- APRS over FLdigi Modes? --
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60-Meter APRS!?? HF NVIS APRS Igate Now Operating
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Flying Digipeater!
<>

11 Copies of UIview in Action on One Computer!
Live Off-The-Air APRS Activity Maps
<>


 

Wow Stephen!
Excellent test and information using Vara. I was wondering when someone would give it a try. Now if someone could just package that into a small box like a tracker for a mobile installation.
Wayne
WA5LUY


 

On 1/10/2023 9:59 AM, wa5luy wrote:
Wow Stephen!
Excellent test and information using Vara. I was wondering when someone would give it a try. Now if someone could just package that into a small box like a tracker for a mobile installation.
Wayne
WA5LUY
I'm working in more-or-less that direction.?? I'm moving the setup into a 7" Windows 8.1 tablet. The screen is just too small for any normal Windows activities, but as a single-use device, the "VARA-tracker" should be a perfect use for this tiny PC.

I did a review of this tablet on my web site some years ago...

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Now I am cramming VARA and VSPE into it's tiny SSD as well.


An interesting alternative might be one of the USB "stick PCs" now available that crams a workable Windows PC into an oversize USB dongle. These devices, based on a SOC ("system-on-chip") single-chip computer normally have an HDMI video-out for a 1080 monitor, WiFi , Bluetooth, and audio I/O. The USB end is used to provide 5VDC from a phone or tablet charger.

These devices are widely used for the video menu displays above the counter at fast-food places, and for schedule displays in airports and convention centers. The Geochron world day/night map display also uses one of these.

These devices give you the ability to run standard Windows applications natively under Windows OS in a form factor, and at a cost, similar to a Raspberry Pi. (Without the hassle of trying to force Windows apps to run under Linux.)

You could connect one of these sticks to an external monitor and keyboard to install and configure a "VARA-tracker" based on VARA and UIview or PinPoint. The apps would be placed in the Windows "Startup" group so they automatically run every time the device is powered up.
??? Then run it "headless" in the car as a dedicated tracker. You would connect a USB GPS receiver like the Globalsat BU-353 to the single micro-USB port on the device.


-------------------------------------------------------------------------------
Stephen H. Smith??? wa8lmf (at) aol.com
Skype:??????? WA8LMF
EchoLink:? Node #? 14400? [Think bottom of the 2-meter band]
Home Page:

-- APRS over FLdigi Modes? --
<>

60-Meter APRS!?? HF NVIS APRS Igate Now Operating
<>

Flying Digipeater!
<>

11 Copies of UIview in Action on One Computer!
Live Off-The-Air APRS Activity Maps
<>


 

On 1/10/2023 9:59 AM, wa5luy wrote:
Wow Stephen!
Excellent test and information using Vara. I was wondering when someone would give it a try. Now if someone could just package that into a small box like a tracker for a mobile installation.
Wayne
WA5LUY
2nd Phase Test Coming Soon

I am now planning to do a comparative "shoot-out" of the performance of VARA vs MFSK16 for APRS.

Here is the preliminary write-up on the planned test in February.

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-------------------------------------------------------------------------------
Stephen H. Smith wa8lmf (at) aol.com
Skype:??????? WA8LMF
EchoLink:? Node #? 14400? [Think bottom of the 2-meter band]
Home Page:

-- APRS over FLdigi Modes? --
<>

60-Meter APRS!?? HF NVIS APRS Igate Now Operating
<>

Flying Digipeater!
<>

11 Copies of UIview in Action on One Computer!
Live Off-The-Air APRS Activity Maps
<>


 

Stephen,
When you say "I am using a stack of components from "VSPE" (Virtual Serial Ports Emulator) to create a serial-to-TCPIP bridge to connect the serial-only KISS output of UIview to the network (TCP/IP) KISS connection provided in the VARA soft-modem."
I am confused. Does that mean you are using UIview, the VSPE software program, and VARA only or is there something in addition.
I am interested in trying APRS with VARA and UIview but I am not a real software proficient person.
If you could provide or publish some instructions on how to set this up it would really be appreciated
Wayne
WA5LUY


 

Well, I just found the instructions after making the post so disregard my question'

Wayne


 

On 1/22/2024 4:50 PM, wa5luy wrote:
Stephen,
When you say "I am using a stack of components from "VSPE" (Virtual Serial Ports Emulator) to create a serial-to-TCPIP bridge to connect the serial-only KISS output of UIview to the network (TCP/IP) KISS connection provided in the VARA soft-modem."
I am confused. Does that mean you are using UIview, the VSPE software program, and VARA only or is there something in addition.
I am interested in trying APRS with VARA and UIview but I am not a real software proficient person.
If you could provide or publish some instructions on how to set this up it would really be appreciated
Wayne
WA5LUY
"VSPE" (Virtual Serial Ports Emulator) is an incredibly versatile tool for dealing with serial ports.? The program is available in separate versions for both 32-bit and 64-bit Windows systems

It can split one incoming physical (or virtual) serial port into multiple virtual serial outputs. For example,? a GPS receiver connected to the input serial port can be shared with multiple applications at the same time. I have had the UIview APRS program, the PinPoint APRS program, Microsoft MapPoint, Precision Mapping, and Delorme Topo North America all using one GPS at the same time. Uniquely among serial port utilities, it can output the SAME com number to multiple apps at the same time!?? In my GPS setup, the hardware GPS input is on COM4.. ALL the using apps are connecting to COM5 - you don't have to assign (and remember) a different COM number to each program.

It can create virtual null modems - two virtual COM ports connected back-to-back. I use this to feed a GPS emulator program outputting to a COM port into an APRS application using a differently-numbered COM port for testing and experimentation without a real GPS device present.
???? In the past, one would have used two physical COM ports on the machine with a cross-over null-modem cable interconnecting them. Now you can do this with just "smoke, mirrors and software".

It can do all manner of? serial-to-IP and IP-to-serial conversions. I use this in my "Studio B" radio trailer to take the virtual serial output of a GPS receiver and share it with 3 apps at the same time on a laptop.? And then, at the same time, share the GPS data with a second computer in the trailer using serial-to-IP and IP-to-serial over WiFi.

It can create a monitor "tap" of an existing serial connection to analyze the data flow between the existing serial ports.

Once configured, you can save multiple configurations into a .VSPE file (actually an XML file ) that can then launch VSPE setups in one click (or be launched by batch files or the Windows Startup group).?? You can trial-and-error change configurations on-the-fly without having to shut down VSPE or reboot the computer.

The program seems to be "bullet-proof" and "just works".? In over a year of using this complex driver-like program, I have NEVER had it lockup or crash!


-------------------------------------------------------------------------------
Stephen H. Smith??? wa8lmf (at) aol.com
Skype:??????? WA8LMF
EchoLink:? Node #? 14400? [Think bottom of the 2-meter band]
Home Page:


APRS-over-VARA igates now operating on 30 & 60 meters
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"Studio B" Ham Shack on Wheels
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-- APRS over VARA? --
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Flying Digipeater!
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