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| 1 | +MetaWear Python SDK |
| 2 | +################### |
| 3 | +Python SDK for creating MetaWear apps on the Linux platform. This is a thin wrapper around the `MetaWear C++ API <https://github.com/mbientlab/MetaWear-SDK-Cpp>`_ so you will find the C++ |
| 4 | +`documentation <https://mbientlab.com/cppdocs/latest/>`_ and `API reference <https://mbientlab.com/docs/metawear/cpp/latest/globals.html>`_ useful. Also, check out the scripts in the |
| 5 | +`examples <https://github.com/mbientlab/MetaWear-SDK-Python/tree/master/examples>`_ folder for full sample code. |
| 6 | + |
| 7 | +**This is not the pymetawear package. That is a community developed Python SDK which you can find over** |
| 8 | +`here <https://github.com/mbientlab-projects/pymetawear>`_ **.** |
| 9 | + |
| 10 | +Install |
| 11 | +####### |
| 12 | +Use pip to install the metawear package. It depends on `PyWarble <https://github.com/mbientlab/PyWarble>`_ so ensure your target environment has the necessary `dependencies <https://github.com/mbientlab/Warble#build>`_ installed. |
| 13 | + |
| 14 | +.. code-block:: bash |
| 15 | +
|
| 16 | + pip install metawear |
| 17 | +
|
| 18 | +Usage |
| 19 | +##### |
| 20 | +Import the MetaWear class and libmetawear variable from the metawear module and everything from the cbindings module. |
| 21 | + |
| 22 | +.. code-block:: python |
| 23 | +
|
| 24 | + from mbientlab.metawear import MetaWear, libmetawear |
| 25 | + from mbientlab.metawear.cbindings import * |
| 26 | +
|
| 27 | +If you do not know the MAC address of your device, use ``PyWarble`` to scan for nearby devices. |
| 28 | + |
| 29 | +.. code-block:: python |
| 30 | +
|
| 31 | + from mbientlab.warble import * |
| 32 | + from mbientlab.metawear import * |
| 33 | + from threading import Event |
| 34 | + |
| 35 | + e = Event() |
| 36 | + address = None |
| 37 | + def device_discover_task(result): |
| 38 | + global address |
| 39 | + if (result.has_service_uuid(MetaWear.GATT_SERVICE)): |
| 40 | + # grab the first discovered metawear device |
| 41 | + address = result.mac |
| 42 | + e.set() |
| 43 | + |
| 44 | + BleScanner.set_handler(device_discover_task) |
| 45 | + BleScanner.start() |
| 46 | + e.wait() |
| 47 | +
|
| 48 | + BleScanner.stop() |
| 49 | + |
| 50 | +Once you have the device's MAC address, create a MetaWear object with the MAC address and connect to the device. |
| 51 | + |
| 52 | +.. code-block:: python |
| 53 | +
|
| 54 | + device = MetaWear(address) |
| 55 | + device.connect() |
| 56 | +
|
| 57 | +Upon a successful connection, you can begin calling any of the functions from the C++ SDK, for example, blinking the LED green. |
| 58 | + |
| 59 | +.. code-block:: python |
| 60 | +
|
| 61 | + pattern= LedPattern(repeat_count= Const.LED_REPEAT_INDEFINITELY) |
| 62 | + libmetawear.mbl_mw_led_load_preset_pattern(byref(pattern), LedPreset.BLINK) |
| 63 | + libmetawear.mbl_mw_led_write_pattern(device.board, byref(pattern), LedColor.GREEN) |
| 64 | + libmetawear.mbl_mw_led_play(device.board) |
| 65 | +
|
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