Aleksander Morgado
ba4e209745
This is the port to git master of the following commit: commit 65f13f41cfd00cd38f118121a58b83713501f45f Author: Dan Williams <dcbw@redhat.com> Date: Tue Jul 17 16:00:31 2012 -0500 gsm: fix sending SMS messages on some modems and use PDU by default It turns out we really do have to wait for the modem to return the ">" prompt before sending the message data, otherwise a number of modems will complain about the data and fail the message. Fix that by sending the first bit of the CMGS, waiting for the ">", and then sending the rest. This also switches all modems over to PDU mode by default if they support it, since it's more compatible and most recent modems don't even bother to support text mode anyway.
ModemManager. The problem ModemManager tries to solve is to provide a unified high level API for communicating with (mobile broadband) modems. While the basic commands are standardized, the more advanced operations (like signal quality monitoring while connected) varies a lot. Using. ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides DBus API, it is possible to use 'dbus-send' command to control it from the terminal. There's an example program (tests/mm-test.py) that demonstrates the basic API usage. Implementation. ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C. The devices are queried from udev and automatically updated based on hardware events. There's a GInterface (MMModem) that defines the modem interface and any device specific implementation must implement it. There are two generic MMModem implementations to support the basic operations (one for GSM, one for CDMA,) which are common for all cards. 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 MMModem 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's a fully working plugin in the plugins/ directory for Huawei cards that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! API. The 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!