[arm-allstar] RPi GPIO COS/PTT

[Jim Kinter Jr.]

Thanks David, and my condolences.

I have been curious for a while now why no one uses the built in 
audio system (not just this project)? Is it that buggy?
A while back, I built a Pi Echolink (svxlink) link node (it used a 
USB fob as well), using VOX for COS and a GPIO for PTT.
It worked for the most part, but sometimes the PTT would get stuck 
(Murphy's law- at the worst possible moment, like when still 1.5 
hours away coming back from a hamfest in north Texas & it is 
deadkeying the local repeater--called the house and had daughter 
unplug the powerpole connection feeding the whole thing). That might 
have been an RFI thing causing it, as I had it in a plastic box, so I 
wonder if a metal enclosure/ferrites might have helped....

I just think, why did they include such things (sound and GPIO) if 
they dont work? :-)

thanks again, and Ill have a look at the Nano solution.

73
Jim


At 12:13 AM 1/23/2017, David Lang wrote:
>On Sun, 22 Jan 2017, "Jim Kinter Jr. via arm-allstar" wrote:
>
>>Greetings,
>>I have been searching over the info on the site and mail list, and 
>>cant seem to find if any instructions are available for using the 
>>Pi's GPIO for COS/PTT yet.
>>I have found where it said it will be included in a future release, 
>>and some other instructions with config settings, but nothing more 
>>definitive (which pins to use for what, config settings for those pins, etc).
>>
>>I friend of mine is using this setup on his repeater with URI, and 
>>Id like to use what I already have without spending $100 a pop on 
>>URIs per setup (I already have a few Pi's at my disposal)
>>I had bought a half dozen USB sound FOBs, but all were blobbed 
>>(they were cheap, so I even attempted to mine down into one blob to 
>>see what I could see, probably effectively destroying the one FOB/losing $2).
>>
>>So is this capability available yet, and if so, where might I find more info?
>
>It is not yet available, they have decided to not use the GPIO pins 
>directly, but to run things through an arduino nano, so it's a $20 
>option instead of a $100 option.
>
>hardware details are available at:
>
>https://sites.google.com/site/radiofarmprojects/home/hamvoip-nano-interface
>
>https://hamvoip.org/hamradio/Nano_Allstar_Interface/
>
>support for this is not yet in any release of the allstar software, 
>but they were planning a release in December that was postponed due 
>to a death in the community. They were planning to have this support 
>either in that release or within a couple of weeks after.
>
>David Lang