mbed-os/features/cellular

Mbed cellular connectivity

This is the Github repo for Mbed cellular connectivity:

framework/
    API         Application Programming Interface for cellular connectivity
    AT          AT implementation based on 3GPP TS 27.007 specification
    common      Common and utility sources
    device      Implementation of cellular device and state machine
    targets     Vendor specific cellular module adaptations

TESTS           Cellular Greentea test

Note: Application developers should use only the API folder.

Known limitations

Please note that this is a first release of Cellular framework and is subject to further development in future.

Supported modules

You can find currently supported cellular modules in the framework/targets/ folder, where we also add support for new cellular modules.

Cellular configuration

You can change cellular defaults in the mbed_lib.json configuration file.

Debug traces

You can define the debug tracing level in the mbed_app.json configuration file:

"target_overrides": {
    "*": {
        "mbed-trace.enable": true,
        "platform.stdio-convert-newlines": true,
        "platform.stdio-baud-rate": 115200,
        "platform.default-serial-baud-rate": 115200
    }
},
"config": {
    "trace-level": {
        "help": "Options are TRACE_LEVEL_ERROR,TRACE_LEVEL_WARN,TRACE_LEVEL_INFO,TRACE_LEVEL_DEBUG",
        "macro_name": "MBED_TRACE_MAX_LEVEL",
        "value": "TRACE_LEVEL_INFO"
    }
}

Greentea tests

The TESTS folder contains Greentea tests for cellular specific classes. You need to give relevant configuration file with --app-config parameter, such as:

mbed test -n features-cellular-tests-* --app-config features\cellular\TESTS\socket\udp\template_mbed_app.json.txt -v

Note: Greentea tests use SIM PIN, so you need to change that or your SIM card may get locked.

Unit tests

Cellular unit tests are in Mbed OS root UNITTESTS. Unit tests are based on the stubbing method.

You need the following applications: cpputest, gcov and lcov (genhtml) for running the tests.

After you run the run_tests script, you can find test results in UNITTESTS/results, and line and function coverages in UNITTESTS/coverages.