Hey, > I have encountered an issue using ModemManager 1.16.8 via dbus. > In my case there is a need to send periodic AT commands to a Cinterion modem > to get infos about connection. > For example AT^SMONI is ok and the response is not empty. However I would > like to get also the response from AT+CREG?. But the response comes back > empty. If I start the ModemManager in debug mode the output of the +CREG? can > be seen in the debug window in the form: > <-- '<CR><LF>+CREG: > 2,1, and so on > Which implies that the response of +CREG? on dbus is probably not parsed > correctly. However I am not familiar with the ModemManager internals and > would kindly ask if someone can clarify this? > > P.S. I can confirm the same behavior for version 1.15.0 too >
This is a known and existing limitation of the Command() API in DBus. The response to the CREG? query is parsed by ModemManager as a URC, and it's "consumed" by the daemon itself, so the returned response ends up empty. -- Aleksander https://aleksander.es
