On 07/13/19 08:03, walter harms wrote: > while searching i found this: > https://github.com/ya-jeks/gsmmux > > ever heard about it ? I've never heard of it, but it does indeed look like the solution you're looking for. You would just run pppd over one of the ptys allocated by that tool, and then use your AT commands on another pty. More generally, neither pppd nor its associated kernel drivers have any sort of multiplexing scheme for carriage of non-PPP data. On a commercial system I once worked on, we had specially-designed modems that had a separate management-only serial port so that we could issue commands without disrupting the data port. Life with consumer-grade modems is different. I've heard of people trying to do the Hayes-patented TIES "<delay>+++<delay>ATH1<nl>AT...<nl>ATO<nl>" stuff with modified drivers in the past, but none of that (if it ever was successful) ended up merging into the main code. A virtual-port based scheme (as you're citing) sounds a lot more promising. -- James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx>
