On Mon, 17 Apr 2017 08:00:01 -0700 Tim Harvey <thar...@gateworks.com> wrote:
> Greetings, > > I've often asked users I'm helping with modem support on Linux to use > GNU screen to issue AT > commands to modems to get their details (ie ATI), however I've noticed > this doesn't work for me anymore on perhaps newer modems and I'm > guessing its related to a missing stty setting relative to CRLF. > > So the following works from bootup on an MC8790 for example: > # echo -e "ATI\r\n" > /dev/ttyUSB3 > # cat /dev/ttyUSB3 > ATI > Manufacturer: Sierra Wireless, Inc. > Model: MC8790 > Revision: K1_0_2_8AP C:/WS/FW/K1_0_2_8AP/MSM6290/SRC 2008/09/17 14:00:22 > IMEI: 352974021856935 > IMEI SV: 3 > FSN: D661380183210 > 3GPP Release 6 > +GCAP: +CGSM,+DS,+ES > > > OK > ^C > > However if I use 'screen /dev/ttyUSB3 57600,cs8' I find that AT > commands are never recognized - I get no response from the modem as if > it didn't catch the right line termination. > > Any ideas as to what's going on here and how I could use screen and/or > stty to resolve it or what the proper stty settings are to avoid this. > > Regards, > > Tim Hey, what version of screen do you use and which distribution? if it worked before, first thing which would help is narrowing down working/not working version ( https://ftp.gnu.org/gnu/screen/ ) And then perhaps using git bisect to narrow it down to specific change (use screen-v4 branch for that http://git.savannah.gnu.org/cgit/screen.git/log/?h=screen-v4 ) Cheers, Amadeusz _______________________________________________ screen-users mailing list screen-users@gnu.org https://lists.gnu.org/mailman/listinfo/screen-users
