Flutter智能穿戴设备交互插件metawear_dart的使用

这是一个用于Flutter的新插件项目。

开始使用

这个项目是一个开始于一个Flutter的插件包，它包含适用于Android和/或iOS的平台特定实现代码。

要开始使用Flutter开发，请查看官方文档，其中包含教程、示例、移动开发指南和完整的API参考。

以下是一个使用metawear_dart插件与MetaWear智能穿戴设备进行交互的完整示例代码：

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:metawear_dart/boards/metamotionrl_board.dart';
import 'package:metawear_dart/metawear.dart';
import 'package:metawear_dart/modules/modules.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _metawearPlugin = Metawear();
  String macAddress = "FA:95:EE:56:26:E9";
  MetamotionRLBoard? board;

  StreamSubscription<Acceleration>? accelerationStream;

  [@override](/user/override)
  void initState() {
    super.initState();
  }

  _scan() async {
    try {
      await _metawearPlugin.requestPermissions();
      print('Scanning for devices');
      _metawearPlugin.startScan().listen((event) {
        print('Found device: $event');
        setState(() {
          board = event;
        });
      });
    } catch (e) {
      print('Failed to scan for devices: $e');
    }
  }

  _connect() async {
    try {
      if (board == null) return;
      await _metawearPlugin.requestPermissions();
      print('Trying to connect to ${board!.id}');
      await _metawearPlugin.stopScan();
      await board!.connect();
      board!.onDisconnected((reason) {
        print('Disconnected from ${board?.id}: $reason');
      });
      setState(() {});
      print('Connected to ${board?.id}; board: $board');
    } catch (e) {
      print('Failed to connect to ${board?.id}');
    }
  }

  _disconnect() async {
    print('Disconnecting from ${board?.id}');
    board?.disconnect();
  }

  _feature({
    required String label,
    required Stream? stream,
    required Function() start,
    required Function() stop,
  }) {
    return [
      Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          Text(label),
          ElevatedButton(
            onPressed: start,
            child: Text('Start'),
          ),
          ElevatedButton(
            onPressed: stop,
            child: Text('Stop'),
          ),
        ],
      ),
      if (board != null && stream != null)
        StreamBuilder(
          stream: stream,
          builder: (context, snapshot) {
            if (snapshot.hasData) {
              return Text('$label: ${snapshot.data}');
            } else {
              return Text('No data');
            }
          },
        ),
    ];
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(children: [
            ElevatedButton(onPressed: _scan, child: Text('Scan')),
            ElevatedButton(
                onPressed: () {
                  _metawearPlugin.stopScan();
                },
                child: Text('Stop Scan')),
            ElevatedButton(onPressed: _connect, child: Text('Connect')),
            ElevatedButton(onPressed: _disconnect, child: Text('Disconnect')),
            ElevatedButton(
              onPressed: () {
                board?.info().then((value) {
                  print('Device info: $value');
                });
              },
              child: Text('Device info'),
            ),
            ElevatedButton(
              onPressed: () {
                board?.model().then((value) {
                  print('Model: $value');
                });
              },
              child: Text('Device model'),
            ),
            ElevatedButton(
              onPressed: () {
                board?.battery().then((value) {
                  print('Battery: $value');
                });
              },
              child: Text('Battery'),
            ),
            if (board != null)
              StreamBuilder(
                stream: board!.state,
                builder: (context, snapshot) => Text('State: ${snapshot.data}'),
              ),
            ..._feature(
              label: 'Acceleration',
              stream: board?.sensorFusionBoschModule.correctedAcceleration,
              start: () {
                board?.sensorFusionBoschModule.startCorrectedAcceleration(
                  mode: SensorFusionBoschMode.NDOF,
                  accRange: SensorFusionBoschAccRange.AR_16G,
                  gyroRange: SensorFusionBoschGyroRange.GR_2000DPS,
                );
              },
              stop: () {
                board?.sensorFusionBoschModule.stop();
              },
            ),
            ..._feature(
              label: 'Angular Velocity',
              stream: board?.sensorFusionBoschModule.correctedAngularVelocity,
              start: () {
                board?.sensorFusionBoschModule.startCorrectedAngularVelocity(
                  mode: SensorFusionBoschMode.NDOF,
                  accRange: SensorFusionBoschAccRange.AR_16G,
                  gyroRange: SensorFusionBoschGyroRange.GR_2000DPS,
                );
              },
              stop: () {
                board?.sensorFusionBoschModule.stop();
              },
            ),
            ..._feature(
              label: 'Magnetic Field',
              stream: board?.sensorFusionBoschModule.correctedMagneticField,
              start: () {
                board?.sensorFusionBoschModule.startCorrectedMagneticField(
                  mode: SensorFusionBoschMode.NDOF,
                  accRange: SensorFusionBoschAccRange.AR_16G,
                  gyroRange: SensorFusionBoschGyroRange.GR_2000DPS,
                );
              },
              stop: () {
                board?.sensorFusionBoschModule.stop();
              },
            ),
            ..._feature(
              label: 'Quaternion',
              stream: board?.sensorFusionBoschModule.quaternion,
              start: () {
                board?.sensorFusionBoschModule.startQuaternion();
              },
              stop: () {
                board?.sensorFusionBoschModule.stop();
              },
            ),
          ]),
        ),
      ),
    );
  }
}

更多关于Flutter智能穿戴设备交互插件metawear_dart的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

caililin 1楼

更多关于Flutter智能穿戴设备交互插件metawear_dart的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

metawear_dart 是一个用于在 Flutter 应用中与 MetaWear 智能穿戴设备进行交互的插件。它允许你通过蓝牙连接 MetaWear 设备，并读取传感器数据、控制设备功能等。

以下是使用 metawear_dart 插件的基本步骤：

1. 添加依赖

首先，在你的 pubspec.yaml 文件中添加 metawear_dart 依赖：

dependencies:
  flutter:
    sdk: flutter
  metawear_dart: ^0.0.1  # 请使用最新版本

然后运行 flutter pub get 来获取依赖。

2. 导入包

在你的 Dart 文件中导入 metawear_dart：

import 'package:metawear_dart/metawear_dart.dart';

3. 初始化 MetaWear

在使用 metawear_dart 之前，你需要初始化它：

final metawear = MetaWear();

4. 扫描并连接设备

你可以使用 metawear.scanAndConnect 方法来扫描并连接到 MetaWear 设备：

void connectToDevice() async {
  try {
    await metawear.scanAndConnect();
    print('Connected to MetaWear device');
  } catch (e) {
    print('Failed to connect: $e');
  }
}

5. 读取传感器数据

连接成功后，你可以开始读取传感器数据。例如，读取加速度计数据：

void readAccelerometerData() async {
  try {
    metawear.accelerometer.listen((data) {
      print('Accelerometer data: $data');
    });
  } catch (e) {
    print('Failed to read accelerometer data: $e');
  }
}

6. 断开连接

当你完成操作后，记得断开连接：

void disconnectDevice() async {
  try {
    await metawear.disconnect();
    print('Disconnected from MetaWear device');
  } catch (e) {
    print('Failed to disconnect: $e');
  }
}

7. 处理设备状态

你可以监听设备的状态变化，例如连接状态、电池状态等：

void listenToDeviceState() {
  metawear.state.listen((state) {
    print('Device state: $state');
  });
}

8. 其他功能

metawear_dart 还支持其他功能，例如读取陀螺仪、磁力计、温度传感器等数据，以及控制 LED、振动器等设备功能。你可以根据 MetaWear 设备的型号和支持的传感器类型来调用相应的方法。

9. 错误处理

在使用过程中，确保对可能的错误进行处理，例如设备未连接、传感器不支持等。

10. 示例代码

以下是一个完整的示例代码，展示了如何连接 MetaWear 设备并读取加速度计数据：

import 'package:flutter/material.dart';
import 'package:metawear_dart/metawear_dart.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MetaWearExample(),
    );
  }
}

class MetaWearExample extends StatefulWidget {
  [@override](/user/override)
  _MetaWearExampleState createState() => _MetaWearExampleState();
}

class _MetaWearExampleState extends State<MetaWearExample> {
  final metawear = MetaWear();

  [@override](/user/override)
  void initState() {
    super.initState();
    connectToDevice();
  }

  void connectToDevice() async {
    try {
      await metawear.scanAndConnect();
      print('Connected to MetaWear device');
      readAccelerometerData();
    } catch (e) {
      print('Failed to connect: $e');
    }
  }

  void readAccelerometerData() async {
    try {
      metawear.accelerometer.listen((data) {
        print('Accelerometer data: $data');
      });
    } catch (e) {
      print('Failed to read accelerometer data: $e');
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('MetaWear Example'),
      ),
      body: Center(
        child: Text('Check console for accelerometer data'),
      ),
    );
  }

  [@override](/user/override)
  void dispose() {
    metawear.disconnect();
    super.dispose();
  }
}