Bridge to CPP SDK

As mentioned previously, the MetaWear Python APIs are a wrapper around the CPP APIs.

from mbientlab.metawear import MetaWear
from mbientlab.metawear.cbindings import *
from mbientlab.warble import *

The core libraries are written in C++ and many of the calls made are from the CPP library. You will find the C++ documentation and API reference useful.


The MetaWear import holds all of the CPP source code for our SDK. For example, the sensor fusion function in CPP:

* Stop sensor fusion
* @param board         Calling object
METAWEAR_API void mbl_mw_sensor_fusion_stop(const MblMwMetaWearBoard* board);

The MetaWear classes can be found here and helper functions here.


The bindings file called cbindings is the glue between Python and the CPP SDK. Here is the binding for the sensor fusion function above:

def init_libmetawear(libmetawear):
    libmetawear.mbl_mw_sensor_fusion_stop.restype = None
    libmetawear.mbl_mw_sensor_fusion_stop.argtypes = [c_void_p]


PyWarble provides Python classes that wrap around the exported functions of the Warble C library. Warble is a wrapper around various Bluetooth LE libraries, providing a common C API for Linux. On Linux, Warble wraps around the libblepp library, which is included as a submodule.