07-13-2022, 01:04 AM
You don't need to use ModemManager to use the AT commands. They go to the modem's USB serial interface, so serial terminals like picocom can be used as stated up thread.. ModemManager is mentioned because on most distros it is already running and connected to that serial port, so to use something like picocom you first need to stop ModemManager. Whether debug mode is needed for AT commands in ModemManager depends on a build option which may or may not be used depending on distro and version.