微信小程序蓝牙连接发送信息

你的名字 2022-05-26 05:39 354阅读 0赞

///获取应用实例
    
    var app = getApp()
    
    Page({
    
    data: {
    
    lanya: "",
    
    state: "",
    
    msg: "",
    
    sousuo: "",
    
    status: "",
    
    connectedDeviceId: "",//连接设备Id
    
    devices: [],
    
    serviceId: "",
    
    writeCharacteristicId: "",
    
    notifyCharacteristicId: "",
    
    },
    
    onLoad: function () {
    
    var that = this;
    
    wx.openBluetoothAdapter({
    
    success: function (res) {
    
    console.log(res.errMsg);
    
    that.setData({
    
    lanya: "初始化小程序蓝牙" + res.errMsg
    
    });
    
    
    
    },
    
    fail: function (res) {
    
    console.log(res);
    
    that.setData({
    
    lanya: "初始化小程序蓝牙" + res.errMsg
    
    });
    
    }
    
    });
    
    },
    
    adapterState: function () {
    
    //获取本机蓝牙适配器状态
    
    var that = this;
    
    wx.getBluetoothAdapterState({
    
    success: function (res) {
    
    console.log(res);
    
    that.setData({
    
    state: res.errMsg
    
    });
    
    }
    
    });
    
    },
    
    selectDevices: function () {//搜索设备
    
    var that = this;
    
    wx.startBluetoothDevicesDiscovery({
    
    allowDuplicatesKey: false,
    
    success: function (res) {
    
    //监听蓝牙适配器状态
    
    wx.onBluetoothAdapterStateChange(function (res) {
    
    that.setData({
    
    sousuo: res.discovering ? "在搜索" : "未搜索",
    
    status: res.available ? "可用" : "不可用",
    
    });
    
    });
    
    setTimeout(function () {
    
    that.getDevices();
    
    }, 1000);
    
    
    
    }
    
    });
    
    },
    
    getDevices: function () {
    
    //获取设备列表
    
    var that = this;
    
    wx.getBluetoothDevices({
    
    success: function (res) {
    
    that.setData({
    
    devices: res.devices
    
    });
    
    //that.test(res.devices);
    
    }
    
    });
    
    },
    
    //停止搜索周边设备
    
    stop: function () {
    
    var that = this;
    
    wx.stopBluetoothDevicesDiscovery({
    
    success: function (res) {
    
    that.setData({
    
    sousuo: res.discovering ? "在搜索" : "未搜索",
    
    status: res.available ? "可用" : "不可用",
    
    });
    
    
    
    }
    
    })
    
    },
    
    
    
    test: function (devices) {
    
    wx.onBluetoothDeviceFound(function (devices) {
    
    console.log(devices);
    
    function ab2hex(buffer) {
    
    var hexArr = Array.prototype.map.call(
    
    new Uint8Array(buffer),
    
    function (bit) {
    
    return ('00' + bit.toString(16)).slice(-2)
    
    }
    
    )
    
    return hexArr.join('');
    
    }
    
    console.log('new device list has founded');
    
    console.log(ab2hex(devices.devices[0].advertisData));
    
    
    
    });
    
    },
    
    connect: function (e) {//连接蓝牙
    
    var that = this;
    
    wx.showModal({
    
    title: '提示',
    
    content: '确定连接此设备吗？',
    
    success: function (res) {
    
    if (res.confirm) {
    
    console.log('用户点击确定');
    
    var clickId = e.currentTarget.id;
    
    wx.createBLEConnection({
    
    // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
    
    deviceId: clickId,
    
    success: function (res) {
    
    that.setData({
    
    connectedDeviceId: clickId
    
    });
    
    wx.showToast({
    
    title: '成功',
    
    icon: 'success',
    
    duration: 2000
    
    });
    
    wx.getBLEDeviceServices({
    
    // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
    
    deviceId: clickId,
    
    success: function (res) {
    
    console.log('device services:', res.services);
    
    that.setData({
    
    service: res.services[1]
    
    });
    
    }
    
    });
    
    that.getService(clickId);
    
    setTimeout(function () {
    
    that.getCharacteristics(clickId, that.data.serviceId);
    
    }, 3000);
    
    wx.onBLEConnectionStateChange(function (res) {
    
    // 该方法回调中可以用于处理连接意外断开等异常情况
    
    console.log(`device ${res.deviceId} state has changed, connected: ${res.connected}`)
    
    });
    
    }, fail: function (res) {
    
    console.log(res.errMsg);
    
    }
    
    });
    
    } else if (res.cancel) {
    
    console.log('用户点击取消')
    
    }
    
    }
    
    });
    
    },
    
    getService: function (deviceId) {
    
    var that = this;
    
    wx.getBLEDeviceServices({
    
    // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
    
    deviceId: deviceId,
    
    success: function (res) {
    
    console.log('device services:', res.services);
    
    that.setData({
    
    serviceId: res.services[1].uuid
    
    });
    
    }
    
    });
    
    },
    
    getCharacteristics: function (deviceId, serviceId) {
    
    var that = this;
    
    wx.getBLEDeviceCharacteristics({
    
    // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
    
    deviceId: deviceId,
    
    // 这里的 serviceId 需要在上面的 getBLEDeviceServices 接口中获取
    
    serviceId: serviceId,
    
    success: function (res) {
    
    console.log(res);
    
    console.log('device getBLEDeviceCharacteristics:', res.characteristics);
    
    for (var i = 0; i < res.characteristics.length; i++) {
    
    if (res.characteristics[i].properties.write && !res.characteristics[i].properties.read &&
    
    !res.characteristics[i].properties.notify && !res.characteristics[i].properties.indicate) {
    
    that.setData({
    
    writeCharacteristicId: res.characteristics[i].uuid
    
    });
    
    } else if (!res.characteristics[i].properties.write && !res.characteristics[i].properties.read &&
    
    res.characteristics[i].properties.notify && !res.characteristics[i].properties.indicate) {
    
    that.setData({
    
    notifyCharacteristicId: res.characteristics[i].uuid
    
    });
    
    }
    
    }
    
    console.log("writeCharacteristicId=" + that.data.writeCharacteristicId);
    
    console.log("notifyCharacteristicId=" + that.data.notifyCharacteristicId);
    
    wx.notifyBLECharacteristicValueChange({
    
    state: true, // 启用 notify 功能
    
    // 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
    
    deviceId: deviceId,
    
    // 这里的 serviceId 需要在上面的 getBLEDeviceServices 接口中获取
    
    serviceId: serviceId,
    
    // 这里的 characteristicId 需要在上面的 getBLEDeviceCharacteristics 接口中获取
    
    characteristicId: that.data.notifyCharacteristicId,
    
    success: function (res) {
    
    console.log('notifyBLECharacteristicValueChange success', res.errMsg);
    
    }
    
    });
    
    that.onBLECharacteristicValueChange();
    
    }
    
    });
    
    },
    
    writeMsg: function () {
    
    var that = this;
    
    let buffer = new ArrayBuffer(7);
    
    let dataView = new DataView(buffer);
    
    dataView.setUint8(0, 0xaa);
    
    dataView.setUint8(1, 0x04);
    
    dataView.setUint8(2, (1 << 7));
    
    dataView.setUint8(3, (1 << 3 | 1));
    
    dataView.setUint8(4, 1);
    
    dataView.setUint8(5, 1 << 2);
    
    
    
    // var buffer = new ArrayBuffer(7);
    
    // buffer[0] = ;
    
    // buffer[1] = ;
    
    // buffer[2] = (1 << 7)
    
    // buffer[3] = (1 << 3) | 1
    
    // buffer[4] = 1;
    
    // buffer[5] = 10;
    
    console.log(buffer);
    
    wx.writeBLECharacteristicValue({
    
    // 这里的 deviceId 需要在上面的 getBluetoothDevices 或 onBluetoothDeviceFound 接口中获取
    
    deviceId: that.data.connectedDeviceId,
    
    // 这里的 serviceId 需要在上面的 getBLEDeviceServices 接口中获取
    
    serviceId: that.data.serviceId,
    
    // 这里的 characteristicId 需要在上面的 getBLEDeviceCharacteristics 接口中获取
    
    characteristicId: that.data.writeCharacteristicId,
    
    // 这里的value是ArrayBuffer类型
    
    value: buffer,
    
    success: function (res) {
    
    console.log('writeBLECharacteristicValue success', res.errMsg)
    
    }
    
    });
    
    },
    
    onBLECharacteristicValueChange: function () {
    
    console.log("start change listen");
    
    wx.onBLECharacteristicValueChange(function (res) {
    
    console.log(`characteristic ${res.characteristicId} has changed, now is ${res.value}`)
    
    console.log(ab2hext(res.value))
    
    });
    
    },
    
    closeBLEConnection: function () {
    
    //断开蓝牙连接
    
    var that = this;
    
    wx.closeBLEConnection({
    
    deviceId: that.data.connectedDeviceId,
    
    success: function (res) {
    
    console.log(res);
    
    }
    
    })
    
    
    
    }
    
    
    
    });