Aleksander Morgado
e7409b6898
The 'SimSlots' property exposes an array of SIM object paths, with one
array item for each available SIM slot in the system. If a valid SIM
card is found in a given slot, the path of the SIM object will be
exposed in the array item; if no valid SIM card is found, the empty
object path ("/") will be exposed instead.
The 'PrimarySimSlot' property exposes which of the SIM slots available
in the system is the one configured as being primary. In a Multi-SIM
Single-Standby setup, the primary slot will be the one corresponding
to the single active SIM in the system. In a Multi-SIM Multi-Standby
setup, the primary slot will be the one configured to act as primary
(e.g. the one that will be used for the data connection) among all the
active SIM cards found.
ModemManager. ModemManager provides a unified high level API for communicating with mobile broadband modems, regardless of the protocol used to communicate with the actual device (Generic AT, vendor-specific AT, QCDM, QMI, MBIM...). Using. ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides a DBus API, it is possible to use 'dbus-send' commands or the new 'mmcli' command line interface to control it from the terminal. The devices are queried from udev and automatically updated based on hardware events, although a manual re-scan can also be requested to look for RS232 modems. Implementation. ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C, using glib and gio. Several GInterfaces specify different features that the modems support, including the generic MMIfaceModem3gpp and MMIfaceModemCdma which provide basic operations for 3GPP (GSM, UMTS, LTE) or CDMA (CDMA1x, EV-DO) modems. If a given feature is not available in the modem, the specific interface will not be exported in DBus. Plugins. Plugins are loaded on startup, and must implement the MMPlugin interface. It consists of a couple of methods which tell the daemon whether the plugin supports a port and to create custom MMBroadbandModem implementations. It most likely makes sense to derive custom modem implementations from one of the generic classes and just add (or override) operations which are not standard. There are multiple fully working plugins in the plugins/ directory that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! The plugin API is open for changes, so if you're writing a plugin and need to add or change some public method, feel free to suggest it! License. The ModemManager and mmcli binaries are both GPLv2+. The libmm-glib library is LGPLv2+.