[arm-allstar] USB FOB Mods

David McGough kb4fxc at inttek.net
Tue Aug 2 09:05:32 EST 2016

Hi Greg,

I guess we're letting the "cat out of the bag." ....But, yes, the new 
telemetry I/O system is external to Asterisk. The actual I/O handler can 
be written in the language of choice. So far, I've got handlers written 
in 'C', another written in python and even some testing code written in 

The only requirement for the external I/O handler is that it must fully 
support SysV message queues (see: 
http://beej.us/guide/bgipc/output/html/multipage/mq.html )...

Note that SysV messaging is distinct from POSIX messaging and subtly
different, but seems to be better supported and slightly more
sophisticated. Performance is lightning fast, operation is simple and 

73, David KB4FXC

On Tue, 2 Aug 2016, Greg Thornwall via arm-allstar wrote:

> Will this be like an external system call to scripts that the user can 
> modify?
> tnx, 73 Greg KD3SU
> On 08/02/2016 12:13 AM, Doug Crompton via arm-allstar wrote:
> > We have been talking about this for awhile but Dave is hard at work on 
> > the code for using other means to read and write PTT, COS and other 
> > bits independent of the sound FOBS. This will allow unmodified FOBS to 
> > be used along with another source for I/O. This will make it out in 
> > beta code in the near future.

More information about the arm-allstar mailing list