Using GNU screen for AT commands

[Aleksander Morgado]

On Tue, Apr 11, 2017 at 3:30 PM, Tim Harvey <tharvey at gateworks.com> wrote:
>> Is ModemManager able to talk to the TTY? Or not even that?
>
> Yes, ModemManager works and to debug this I looked at its code to see
> what it was doing the other day:
> https://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/mm-port-serial.c#n1055.
> I didn't see anything there that surprised me but I haven't compared
> with what screen/minicom were doing.

BTW; if you build ModemManager yourself you'll get a test utility that
allows to interactively send commands to the tty using the same code
ModemManager is using:

ModemManager/test:(master)$ ./mmtty --help
Usage:
  lt-mmtty [OPTION...] - ModemManager TTY testing

Help Options:
  -h, --help               Show help options

Application Options:
  -d, --device=[PATH]      Specify device path
  --no-flash               Avoid flashing the port while opening
  --no-echo-removal        Avoid logic to remove echo
  --send-delay=[DELAY]     Send delay for each byte in microseconds
(default=1000)
  -v, --verbose            Run action with verbose logs
  -V, --version            Print version


-- 
Aleksander
https://aleksander.es