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Python bindings for the MetaWear C++ SDK by MbientLab

Project description

MetaWear Python SDK

Python SDK for creating MetaWear apps on the Linux platform. This is a thin wrapper around the MetaWear C++ API so you will find the C++ documentation and API reference useful. Also, check out the scripts in the examples folder for full sample code.

This is not the pymetawear package. That is a community developed Python SDK which you can find over here .

Install

Use pip to install the metawear package. It depends on PyWarble so ensure your target environment has the necessary dependencies installed.

pip install metawear

Usage

Import the MetaWear class and libmetawear variable from the metawear module and everything from the cbindings module.

from mbientlab.metawear import MetaWear, libmetawear
from mbientlab.metawear.cbindings import *

If you do not know the MAC address of your device, use PyWarble to scan for nearby devices.

from mbientlab.warble import *
from mbientlab.metawear import *
from threading import Event

e = Event()
address = None
def device_discover_task(result):
    global address
    if (result.has_service_uuid(MetaWear.GATT_SERVICE)):
        # grab the first discovered metawear device
        address = result.mac
        e.set()

BleScanner.set_handler(device_discover_task)
BleScanner.start()
e.wait()

BleScanner.stop()

Once you have the device’s MAC address, create a MetaWear object with the MAC address and connect to the device.

device = MetaWear(address)
device.connect()

Upon a successful connection, you can begin calling any of the functions from the C++ SDK, for example, blinking the LED green.

pattern= LedPattern(repeat_count= Const.LED_REPEAT_INDEFINITELY)
libmetawear.mbl_mw_led_load_preset_pattern(byref(pattern), LedPreset.BLINK)
libmetawear.mbl_mw_led_write_pattern(device.board, byref(pattern), LedColor.GREEN)
libmetawear.mbl_mw_led_play(device.board)

Project details


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