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1-persistence



Ok, I hear that there is 'expert' guidance to use 1-persistence on APRS digis, so ditching a collision avoidance mechanism of CSMA.

The failure of that approach in practical networks just questions the 'grand plan' design.

I helps me to better understand other weaknesses of APRS.

Owen



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Posted by: owenvk-/E1597aS9LT0CCvOHzKKcA@public.gmane.org



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Macro issues OT3m



I am new to the OT3m and the scripting language. While attempting to make a macro I ran in to a problem. Wondering if I am doing something wrong or what.


The macro I am attempting to create is to beacon the UNIT, PARM, and EQNS APRS messages. I created a siz line macro like below. When I run the macro only the last 2 lines get executed. If I remove the macro write (only there for debugging) only the last beacon gets executed. I never see packets for EQNS or PARM.


Just wondering if I am doing something wrong or if its a bug.


Hardware: OT3m

Firmware: 56476


Macro TELPARM
  Macro Write "EQNS"
  Exec "BEACON :KE7BAP-15:EQNS.0,.1,0,0,.1,0,0,.1,0,0,.1,0,0,.1,0"
  Macro Write "PARM"
  Exec "BEACON :KE7BAP-15:PARM.Voltage,Aux1,Aux2,Aux3,Aux4,,,,,,CFG,JMP"
  Macro Write "UNIT"
  Exec "BEACON :KE7BAP-15:UNIT.Vdc,,,,,,,,,,,CFG,JMP"

End Block



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Posted by: Jonathan Karras <jkarras-mw/gZPVzU2asTnJN9+BGXg@public.gmane.org>



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Trouble with OT2

Hi All,

I have a OT2 in service as a Digi at WB0VXY-1

It went off the air last week.

A power cycle brought it back.

Now, a week later, it's off the air again.

Anything I should try on the serial port before I power cycle it again?

T3

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Posted by: Tom Tengdin <t.tengdin@...>
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How to connect a Yaesu FT-60R to the T3-Mini.

Hello!

I would like to know how to connect a Yaesu FT-60R to the T3-Mini.

I found this Speaker Mic Cable (Yaesu/Vertex Type) in the store. 
https://www.argentdata.com/catalog/product_info.php?products_id=68

Could anybody tell me if these connections are right?

Yaesu Cable         T3-Mini Pinout
Red (Speaker) <--> AIN (Audio Input) 
White (Mic)   <--> AOUT (Audio Output)
Blue (PTT)    <--> PTT (Push to Talk)
Black (Ground)<--> Ground

Thanks in advance!
H

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Posted by: rosendeh@...
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How to connect a Yaesu FT-60R to the T3-Mini.



Hello!I would like to know how to connect a Yaesu FT-60R to the T3-Mini.I found this Speaker Mic Cable (Yaesu/Vertex Type) in the store. https://www.argentdata.com/catalog/product_info.php?products_id=68Could anybody tell me if these connections are right?Yaesu Cable    T3-Mini PinoutRed (Speaker) <--> AIN (Audio Input) White (Mic) <--> AOUT (Audio Output)Blue (PTT) <--> PTT (Push to Talk)Black (Ground) <--> GroundThanks in advanceH



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Posted by: rosendeh-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org



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How to connect a Yaesu FT-60R to the T3-Mini.



Hello!I would like to know how to connect a Yaesu FT-60R to the T3-Mini.I found this Speaker Mic Cable (Yaesu/Vertex Type) in the store. https://www.argentdata.com/catalog/product_info.php?products_id=68Could anybody tell me if these connections are right?Yaesu Cable               T3-Mini PinoutRed (Speaker) <--> AIN (Audio Input) White (Mic) <--> AOUT (Audio Output)Blue (PTT) <--> PTT (Push to Talk)Black (Ground) <--> GroundThanks in advanceH



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Posted by: rosendeh-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org



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Would like to join the group



Hello! I currently own an Argent Data Systems Tracker3 OT3m I purchased a year ago from Mr. Scott Miller. I was just able to connect it to my Garmin nuvi 2797LMT today and would like to join this group so I could gain a bit of support. My HAM ID is KB1VLJ. Thank you!


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Posted by: Ian Rymszewicz <rymszewicz2112-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>



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Interoperability of FoxTrak tracker and Argent Data’s OT3



I have observed recently that two Foxtraks were not decoded by OT3s and OT-USB that should have decoded them.

To futher expore the problem, I pulled about 16,000 records from APRS-IS and looked for evidence that a Foxtrak had been received by any OT device, and I did not find any though I know that at least two should have been decoded by at least four OT devices over some hours. Note that absence of evidence of decoding is not proof of incompatibility, but evidence of decoding would be proof that there is not absolute incompatibility.

I am aware of the frailties and pitfalls of the above method, but it is consistent with my direct tests of Foxtrack with OT3 and OT-USB.

One expert has advised that because Foxtraks are so popular, just dont use OTx for infrastructure.
It is intriguing that I did find evidence of TinyTrak decoded by OTx, but they may not have been early TT. Certainly my tests with OTx on my Foxtrak with DK7IN, aprstracker and TT(1) firware all failed.

I also monitored the traffic on a dedicated channel from a Foxtrak with a T3-135 using PASSALL and it was all jibberish, there was not even short strings of recognisable text. That suggests to me that there is a failure to decode the raw data stream.

Nevertheless, I am interested in solving the problem if it is reasonably feasible.

So, next step is to try and further isolate the problem.

Thoughts include that the incompatibility might be related to clock recovery, data recovery, or packet contents.

I am thinking of capturing the packets from a Foxt rak (as binary data) from a KISS TNC, then playing it back through a non-OT TNC to see if a OT TNC decodes it. That might indicate whether it is modulation related for packet content related.

I don't want to repeat work already done.

Has someone got relevant information, am I heading down the wrong track (pardon the pun).

Owen

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Posted by: owenvk-/E1597aS9LT0CCvOHzKKcA@public.gmane.org



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COP / external watchdog



I have been warned by existing user to expect periodic lockups of OT3, and not wanting to incur the reliability problems and cost of trips to remote sites to reset them, I am thinking of some kind of watchdog solution.

I assume that the code already uses COP features in the processor, but for some reason the lockups are still reseting COP.

That motivates me to think of an external watchdog. I am thinking of a very simple app in an ATTiny25 that monitors PTT, and if there is not PTT activity after a programmable period, that it pulls the OT3's reset line low and releases it. I would include facility to latch that it activated and show a LED, and since the signals are there, to monitor PTT for transmit timeout. All timing parameters would be stored in EEPROM independently o f executable code.

This could be built on a piece of stripboard, with flying leads to attach to the OT3, and encapsulated with heatshrink tube, double sided tape to secure it inside the box.

Am I heading down the wrong track?

Owen





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Posted by: owenvk-/E1597aS9LT0CCvOHzKKcA@public.gmane.org



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SSTVCam died



I did not see a group for the Argent Data SSTVCam so I thought this might be the better group to post. 
I have a SSTVCam i purchased about 2 years ago I think. I created a little interface board with jumpers and a 5v regulator. This worked fine when I first got it but it was stored up until this week when I pulled it out to prep it to fly on a balloon this weekend. Originally I had this connected to a little RadioShack 2m HT but I wanted to use a UHF freq so s to not interfere wit my APRS tracker. I created a cable to interface to a UV-3R and it powered on and after an initial delay it started transmitting every 2 minutes. I was having issues trying to get the SSTV software on my iPhone and iPad to interface with another  UV-3R and an IC-R3. I got tired of waiting 2 minu tes so decided to cut the interval to 30 seconds. Nothing happened. I was getting frustrated and got the call for dinner so I powered everything off and left it for a day. Today I started looking at it again and still nothing. I then noticed the LED on the SSTVCam was not turning on. I checked that there was power to my 5v regulator and ther was power in the Vin pin of the SSTVCam but still no lit LED. I will re set the jumpers back to the 2 minute delay but is there some thing else I should do or check on?

Bruce



-- 
Bruce W. Martin, KQ4TV
Mt. Juliet, TN
EM66sf



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Posted by: "Bruce W. Martin" <yahoo-QXdnxvasuo8@public.gmane.org>



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OT3m "USB not recognized (Device Descriptor Request Failed) Code 43" error in Windows 8.1



I accidentally posted the below message in the opentracker group before realising that this is the right group to post it:


When plugging my Open Tracker 3 into my lenovo X230 laptop running windows 8.1, I'm getting a "USB not recognized (Device Descriptor Request Failed) code 43" error. 


I am able to connect to the Open Tracker 3 using the serial port, and the Open Tracker 3 is otherwise working normally. 


I have already tried: 


- loading the .inf driver as per instructions on the argent wiki (this results in a message that the device already has the most up to date driver installed but does not resolve the problem)


- using a different USB port and cable


- cycling the power on the laptop and Open tracker


- uninstalling and re-installing the open tracker in device manager


I'm guessing this is a windows 8.1 problem and I can live with only being able to connect to the open tracker by serial port but just wondered if anyone had any ideas.





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Posted by: roj_blake42-/E1597aS9LQAvxtiuMwx3w@public.gmane.org



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Gmane