> > I'm trying on MM 1.20.4 and noticing that AT+C5GREG? (and also AT+CREG?) do > not report any output when called from mmcli. > > # mmcli -m 0 --command=AT+C5GREG? > response: '' > # mmcli -m 0 --command=AT+CREG? > response: '' > # mmcli -m 0 --command=AT+C5GREG=? > response: '+C5GREG: (0-2)' > > +C5GREG? (or +CREG?) is correctly reported using minicom so modem does > responding to these commands. > > Any idea what could be going wrong? I'm trying with Telit FN990 but looks > like this is a generic issue. >
ModemManager has a mechanism to process URCs coming in the AT response flow. Your command response is being "eaten" by this mechanism, which ModemManager processes as a URC. This is a known limitation of --command; at the end ModemManager cannot ensure that a real valid +C5GREG URC is interleaved between your command and your response. I guess we could try to improve that, but I'd prefer to suggest not using +C5GREG? in --command, because attempting that would be tricky :D -- Aleksander
