[aprssig] Thinking about YAAC

Brian Webster info at wirelessmapping.com
Mon Dec 9 07:49:41 EST 2019

YAAC will work with older TNC's. Go to configure, expert, add port. Select
serial and then the TNC2 mode. The software will send the TNC in to kiss
mode. You can also enter any additional commands you want sent to the TNC as

Thank You,
Brian N2KGC

-----Original Message-----
From: aprssig [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of wa7skg
Sent: Monday, December 09, 2019 1:54 AM
To: Greg D; aprssig at lists.tapr.org
Subject: Re: [aprssig] Thinking about YAAC

For mobile use I will be using an RPi 3B+ with a TNC-Pi, so I won't need 
Direwolf in that application. The TNC-Pi will provide an adequate 
interface between the radio and computer.

For the base, I have a Linux desktop computer running Mint currently 
connected to an MFJ-1274 (MFJ-1270B with tuning indicator) to the radio. 
If I were to use Direwolf on the base, I would need to add a soundcard 
and homebrew some kind of interface for the PTT as well as fabricate new 
cables. Right now, I have a very simple configuration with a single 
serial cable going to the TNC and a single cable going from the TNC to 
the radio and it all works very well. At least with Xastir. With YAAC, 
however, I get nothing displaying on the map. In the configuration 
window for the interface where it has the TEST PORT button, I see plenty 
of data coming in from the TNC. Just nothing displays on the map or in 
the RAW DATA window.

Michael WA7SKG

Greg D wrote on 12/8/19 10:06 PM:
> I'm running YAAC and Direwolf on a Raspberry Pi 3B in my car.  Works
> pretty well, though with the Pi tethered to my Smartphone along with the
> RF link there seem to be some combinations of Digipeating, iGating, and
> messaging that don't seem to work quite right.  Messages didn't get
> delivered in one direction, and I've never figured out what to do about
> it.  If you're all RF, it works great.
> As Stephen noted, the sound card TNCs work really well, and the Pi's
> GPIO pins make the PTT function easy to implement (no need for VOX).
> Just be careful about the voltage levels so you don't damage the Pi.  A
> 1-transistor buffer is usually required.
> Good luck,
> Greg  KO6TH
> wa7skg wrote:
>> I'm looking at alternatives to Xastir for an APRS client and ran
>> across YAAC. The only mailing list I found was for Alpha testers on
>> Yahoo groups. Of course Yahoo groups is a dying animal, so I thought
>> I'd try here.
>> My first issue in setting up YAAC is with my hardware. I have an old
>> original MFJ-1274(NO suffix) TNC2 clone. It does not do KISS, so I'm
>> wondering if it will work with YAAC. Still looking for up to date
>> documentation.
>> After setting this up on my base, I am planning to use it mobile with
>> an RPi and TNC-Pi.
>> Looking for any comments, experiences, etc.
>> tnx es 73,
>> Michael WA7SKG

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