蓝牙插件BLE

 

支持:iOS和Android4.3+

安装:Cordova

$ cordova plugin add cordova-plugin-ble-central https://github.com/don/cordova-plugin-ble-central#phonegap

PhoneGap

$ phonegap plugin add cordova-plugin-ble-central https://github.com/don/cordova-plugin-ble-central#phonegap-build

 

因为现在ionic已经到ionic5了,但是ionic3需要使用蓝牙插件,那么npm时需要指定版本

sudo ionic cordova plugin add cordova-plugin-ble-central

sudo npm install @ionic-native/ble@^4.20.0

 

API:

scan 扫描:

蓝牙扫描的方法,第二个参数10指的扫描时间,单位是秒,device是扫描的设备

ble.scan(services, seconds, success, failure);

参数:

  • services: 发现的服务列表或[ ]中所有设备
  • seconds: 时间
  • success: 成功回调
  • failure: 失败回调

example:

ble.scan([], 5, function(device) {    

    console.log(JSON.stringify(device));}, failure);

 

startScan 开始扫描:

ble.startScan(services, success, failure);

参数:

  • services: 发现的服务列表或[]中所有设备
  • success: 成功回调
  • failure: 失败回调

example:

ble.startScan([], function(device) {
    console.log(JSON.stringify(device));}, failure);
setTimeout(ble.stopScan,
     5000,
     function() { console.log("Scan complete"); },
     function() { console.log("stopScan failed"); });

 

startScanWithOptions 指定扫描:

ble.startScanWithOptions(services, options, success, failure);

参数:

  • services: 发现的服务列表或[]中所有设备
  • options: 一个对象指定一组键值对,现在支持的选项如下:
    true:如果复制设备应该报道,
    false:(默认)如果设备只报告一次。(可选)
  • success: 成功回调
  • failure: 失败回调

example:

ble.startScan([],
    { reportDuplicates: true }
    function(device) {
        console.log(JSON.stringify(device));
    },
    failure);
setTimeout(ble.stopScan,
    5000,
    function() { console.log("Scan complete"); },
    function() { console.log("stopScan failed"); });

 

stopScan 停止扫描:

ble.stopScan(success, failure);

参数:

  • success: 成功回调
  • failure: 失败回调

example:

ble.startScan([], function(device) {
    console.log(JSON.stringify(device));}, failure);
setTimeout(ble.stopScan,
    5000,
    function() { console.log("Scan complete"); },
    function() { console.log("stopScan failed"); });
/* Alternate syntax setTimeout(function() { ble.stopScan( function() { console.log("Scan complete"); }, function() { console.log("stopScan failed"); } ); }, 5000); */

connect 连接:

连接蓝牙的方法,第一个参数是你扫描到的设备的id,后面的是成功和失败的回调

ble.connect(device_id, connectSuccess, connectFailure);

参数:

  • device_id: uuid或者设备的mac地址
  • connectSuccess: 连接成功回调
  • connectFailure: 连接失败回调
example:
$scope.connectFun=function(device){
    ble.connect(device.id, $scope.onConnected, $scope.onError);}

 

disconnect 断开连接:

ble.disconnect(device_id, [success], [failure]);

参数:

  • device_id: UUID 或者设备 MAC 地址
  • success: 成功回调
  • failure: 失败回调

example:

ble.disconnect(device.id, function(){

    //do something}, function(){

    //do something});

 

read 读:

ble.read(device_id, service_uuid, characteristic_uuid, success, failure);

参数:

  • device_id: 设备UUID 或者 设备 MAC 地址
  • service_uuid: 蓝牙设备的uuid
  • characteristic_uuid: UUID of the BLE characteristic
  • success: Success callback function that is invoked when the connection is successful. [optional]
  • failure: Error callback function, invoked when error occurs. [optional]

example:

readCounter = setInterval(function () {
    ble.read(device.id, $scope.serviceUUID, $scope.counterCharacteristic,$scope.onDataReader, $scope.onReadError);}, 1000);
 

$scope.serviceUUID:蓝牙的UUID,具体不懂,每个蓝牙都有,但是这个值需要注意的地方就是它在android和ios上的写法不一样,比如在android上它的值是xxxxfff0-xxxx-xxxx-xxxx-xxxxxxxxxxx,那么它在ios上就是FFF0,这个可以用ionic.Platform.isAndroid()进行平台判断
 

$scope.counterCharacteristic:蓝牙的特性值,写法跟UUID类似,在android和ios的差异写法也跟UUID一样,刚开始我在android上写好功能后在iOS上连不上蓝牙问题就出在了这里
 

$scope.onDataReader:成功的回调,可以进行读取数据
 

$scope.onReadError:失败的回调



 

读取数据扩充:

$scope.onDataReader=function(buffer){
//buffer就是蓝牙读取的数据,但是需要转换才能被引用
var data = new Uint8Array(buffer);//Uint8Array对象:8 位无符号整数值的类型化数组。内容将初始化为0。如果无法分配请求数目的字节,则将引发异常。
//这里可以一步步打印data然后按需要转出所需的数据
//将值赋值给页面上绑定的变量时,如果变量没有变化,试着用
$scope.$apply(function(){
        //将计算后的数据给变量赋值,要用$apply涉及到了ng的脏值检查机制,有兴趣可以去搜搜相关资料
})}

write 写:

ble.write(device_id, service_uuid, characteristic_uuid, data, success, failure);

参数:

  • device_id: 设备蓝牙的UUID或设备的mac地址
  • service_uuid: 蓝牙服务的UUID
  • characteristic_uuid: 具有特征值的蓝牙的UUID
  • data: 利用数组存储的二进制数
  • success: 成功回调
  • failure: 失败回调

example:

// send 1 byte to switch a light onvar data = new Uint8Array(1);data[0] = 1;

ble.write(device_id, "FF10", "FF11", data.buffer, success, failure);

// send a 3 byte value with RGB colorvar data = new Uint8Array(3);data[0] = 0xFF; // reddata[1] = 0x00; // greendata[2] = 0xFF; // blue

ble.write(device_id, "ccc0", "ccc1", data.buffer, success, failure);

// send a 32 bit integervar data = new Uint32Array(1);data[0] = counterInput.value;

ble.write(device_id, SERVICE, CHARACTERISTIC, data.buffer, success, failure);

 

writeWithoutResponse 无响应的写入:

向特征设备写入无返回响应的数据

ble.writeWithoutResponse(device_id, service_uuid, characteristic_uuid, data, success, failure);

参数:

  • device_id: 设备蓝牙的UUID或设备的mac地址
  • service_uuid: 蓝牙服务的UUID
  • characteristic_uuid: 具有特征值的蓝牙的UUID
  • data: 利用数组存储的二进制数
  • success: 成功回调
  • failure: 失败回调

startNotification 开始通知:

ble.startNotification(device_id, service_uuid, characteristic_uuid, success, failure);

参数:

  • device_id: 设备蓝牙的UUID或设备的mac地址
  • service_uuid: 蓝牙服务的UUID
  • characteristic_uuid: 具有特征值的蓝牙的UUID
  • data: 利用数组存储的二进制数
  • success: 成功回调
  • failure: 失败回调

ble.startNotification(device_id, "FFE0", "FFE1", onData, failure);

example:

var onData = function(buffer) {

    // Decode the ArrayBuffer into a typed Array based on the data you expect

    var data = new Uint8Array(buffer);

    alert("Button state changed to " + data[0]);}

 

stopNotification 停止通知:

ble.stopNotification(divece_id,servece_uuid,characteristic_uuid,success,failure)

  • device_id: 设备蓝牙的UUID或设备的mac地址
  • service_uuid: 蓝牙服务的UUID
  • characteristic_uuid: 具有特征值的蓝牙的UUID
  • data: 利用数组存储的二进制数
  • success: 成功回调
  • failure: 失败回调

 

isConnected 是否连接:

ble.isConnected(device_id, success, failure);

参数:

  • device_id: 设备的uuid或者mac地址
  • success: 成功回调
  • failure: 失败回调

example:

ble.isConnected(
    'FFCA0B09-CB1D-4DC0-A1EF-31AFD3EDFB53',
    function() {
    console.log("Peripheral is connected");
    },
    function() {
        console.log("Peripheral is *not* connected");
    });

 

isEnabled 是否开启蓝牙:

ble.isEnabled(success, failure);

参数:

  • success: 成功回调
  • failure: 失败回调

example:

ble.isEnabled(

    function() {

        console.log("Bluetooth is enabled");

    },

    function() {

        console.log("Bluetooth is *not* enabled");

    });

 

startStateNotification 打开通知状态:

ble.startStateNotifications(success, failure);

状态:

  • "on"
  • "off"
  • "turningOn" (Android Only)
  • "turningOff" (Android Only)
  • "unknown" (iOS Only)
  • "resetting" (iOS Only)
  • "unsupported" (iOS Only)
  • "unauthorized" (iOS Only)

参数:

  • success: 成功回调
  • failure: 失败回调

 

example:

stopStateNotification 停止状态通知:

ble.startStateNotifications(success, failure);

showBluetoothSettings 显示蓝牙设置:

ble.showBluetoothSettings(success, failure);

enable 打开蓝牙:

enable只能在Android平台使用,iOS无法使用。如果蓝牙已经打开,成功回调函数无法调用

ble.enable(success, failure);

参数:

  • success: 成功回调
  • failure: 失败回调

example:

ble.enable(
    function() {
        console.log("Bluetooth is enabled");
    },
    function() {
        console.log("The user did *not* enable Bluetooth");
    });