Hello Ronen,

I understand the dierwolf is a Software TNC it mean it require to install something on the PI that will make it TNC like AGWPACKET do for PC Im NOT a software man (specially not compilation man) If i chose this system May someone install the neccessary software fort me ? im willing to give root access to my pi.. thats why i prefer hardware solution.

Its not clear what you want to do with this new packet setup be it an APRS setup, enable full classic packet connectivity, etc. but additional software will be required. The use of a physical TNC (TNCpi, KPC3, etc) or a virtual TNC (Direwolf, soundmodem, etc) will still require some software to be installed and configured. I'm sure lots of people here can help (I'm willing to help) but I'd argue, I'd take the Q&A to RaspberryPi-4-HamRadio@groups.io as that's a more appropriate list than this one for AMPR connectivity discussions.

So few questions about the dearwolf ? does it support TCP/IP beside AX25 ? does it have Net/Rom Support ?

Direwolf is an interesting animal. It supports:

- Multi-platform: Windows, Mac, Linux - supports the 300bps, 1200bps AFSK modes - supports 2400bps and 4800bps PSK modes (some try to be compatible with older MFJ modes) - supports FSK modes up to 38400bps (requires flat 192Khz sound cards and ultra wide radio passbands) - supports multiple off-frequency decoders to decode off-frequency stations - supports multi-bit error recovery with tunable training heuristics around APRS traffic vs. classic packet - KISS connection to the OS via a virtual serial port (/dev/pts system) - KISS connection to any network host via KISS-TCP - Has complete AGW connectivity for connected and connectionless AX.25 traffic - Has a complete AX.25 v2.2 (not v2.1) stack which is accessible via the AGW network connection - gives Windows and Mac users a full AX.25 stack - Has a 90% complete APRS stack for various beacon types, GPS support, SmartBeacon, telemetry, etc. but no APRS messaging today - Has an APRStt (touch tone) stack to support DTMF-enabled radios to send position reports from non-APRS radios

Does the dearwolf require additional hardware I understand a sound card required is it connect to the PI with USB ? or stick on its piggy back connector ?

At minimum, just a USB sound card ($5 US) and some way to key up your radio. The Direwolf UserGuide details all this for you. On a Raspberry Pi, a simple transistor circuit and a GPIO pin off the Pi is all you need.

As for the solution that Bill suggest what does it require ? only Software ? Does it support TCP/IP ?

If you want to run TCP/IP, you'll want to use the LInux AX.25 stack and since it's in Linux, ANYTHING is possible at that point. It will just work once you get all the routing right. I've done this and I can help you here. I will warn you that unless you're going to run an RF link at 9600bps, it's VERY VERY slow. Ping times @ 1200bps AFSK is usually 1200 to 1500ms alone and simple TELNETs work but it's painful.

Is there any pkace that describe the dearwolf for dummies ? you pointed me to a GitHub to me it is "chineese" i need a place that describe what is needed in order to get on the aur hardware software and instalation description

Well, the Direwolf User Guide and the other docs at https://github.com/wb2osz/direwolf/tree/master/doc are VERY good. I encourage you to skim over them. For a cookbook approach, you might like my Packet on Raspberry Pi document at:

http://www.trinityos.com/HAM/CentosDigitalModes/RPi/rpi2-setup.html

it covers the installation of Raspbian, hardening it, getting Direwolf, Linpac compiled, installed, configured, as well as optional topics like adding an RTC chip via I2C, adding a 20x4 LCD display, using Bluetooth to a Kenwood D74 TNC, etc. Every single command and expected output is given so ANYONE should be able to follow the steps. There are other good guides out there on the Internet as well but they are mostly point topics and you have to piece them all together to make a complete system. My doc is top to bottom with a common example

--David KI6ZHD

On 08/03/18 02:36, Demetre - SV1UY wrote:

The following conversation might be interesting. It seems that G8BPQ has developed a Teensy GPIO plug-in modem for the RPi and it runs BPQ.

Actually ot supports all sorts of modes including 9600 AX25 packet:

https://ardop.groups.io/g/users/topic/4346217

Now, this is an interesting development.

Couldn’t you just use dire wolf? It is a free soft Tnc that supports 9600

https://github.com/wb2osz/direwolf

Direwolf is awesome..

I’m a huge fan of direwolf. Pair a usb soundcard with a cheap radio and you can easily have a ~$100 dollar aprs rigs that can tx and rx.

We still, even after all these years, have a real lack of a 'good' higher speed packet radio. The cheap (BaoFeng?) radios will work (sorta) for APRS but at slower speeds (maybe up to 3600?) and they have a TXD an order of a magnitude longer than acceptable.

There are some options for 9600 (or faster) but there are still issues and challenges.

...

I had to spend more than $100 total to do 9600 I'd question the whole

The problem with Packet Radio is still the 'radio.' A reasonable 9k6 station is about $250 - but at that price better off just getting an off the shelf Kenwood TH-D710 which works well at 9k6 and offers a second channel.

Adjusted for time - these are still way cheaper than the $500 I paid in 1986 for my first 1200 baud packet station consisting of a Kantronics KPC and Yeasu HT.

The article on 9600 packet in last years DCC proceedings (PDF is available on the web) is a good review of the technology and is a start for looking at radios.

73 Bill, WA7NWP

https://tnc-x.com/TNCPi.htm 73's f4dkf

De : David Ranch amprgw@trinnet.net À : AMPRNet working group 44net@mailman.ampr.org Objet : Re: [44net] TNC for Raspberry pi that support 9600 Baud ? Date : 08/03/2018 07:10:00 CET

I agree with everything Bill has mentioned. Direwolf can work well north of 19200bps if it has a soundcard that can support say 96Khz or 192Khz into a radio that can handle the increased bandwidth too. The larger issue is the lack of any data grade radios. I'm talking radios with a RX->TX and TX->RX times in say the low tens of milliseconds range. Without fast key-up and rx recovery times, there just isn't much we can do here to really "go faster".

NW Digital's UDRX has promised something like this this but it's been years... I'm still hoping it or something similar will come to market that's affordable. Here's hoping!

--David KI6ZHD

On 03/07/2018 06:53 PM, Bill Vodall wrote:

...

Couldn’t you just use dire wolf? It is a free soft Tnc that supports 9600

https://github.com/wb2osz/direwolf

Direwolf is awesome..

...

I’m a huge fan of direwolf. Pair a usb soundcard with a cheap radio and you can easily have a ~$100 dollar aprs rigs that can tx and rx.

We still, even after all these years, have a real lack of a 'good' higher speed packet radio. The cheap (BaoFeng?) radios will work (sorta) for APRS but at slower speeds (maybe up to 3600?) and they have a TXD an order of a magnitude longer than acceptable.

There are some options for 9600 (or faster) but there are still issues and challenges.

...

I had to spend more than $100 total to do 9600 I'd question the whole

The problem with Packet Radio is still the 'radio.' A reasonable 9k6 station is about $250 - but at that price better off just getting an off the shelf Kenwood TH-D710 which works well at 9k6 and offers a second channel.

Adjusted for time - these are still way cheaper than the $500 I paid in 1986 for my first 1200 baud packet station consisting of a Kantronics KPC and Yeasu HT.

The article on 9600 packet in last years DCC proceedings (PDF is available on the web) is a good review of the technology and is a start for looking at radios.

73 Bill, WA7NWP

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