向蓝牙设备发送“AA040500010105”的指令，代码如下：

bluetoothLock:function(){

var that = this;

that.writeBluetoothData1('AA040500010105',7);

},

writeBluetoothData1: function (e, num) {      //写入执行1指令

var that = this;

wx.writeBLECharacteristicValue({

deviceId: that._deviceId,

serviceId: that._serviceId,

characteristicId: that._characteristicId,

value: that.getBinaryData1(e, num),

success(res) {

console.log('writeBLECharacteristicValue success', res.errMsg)

},

fail(res) {

console.log('writeBLECharacteristicValue fail', res.errMsg)

}

});

},

getBinaryData1: function (message, num) {       //将数据转为二进制数组

let buffer = new ArrayBuffer(num);

let dataView = new DataView(buffer);

var numTitle = 0;

for (var i = 0; i < message.length; i = i + 2) {

var numStr16 = message.substr(i, 2);

var num1 = parseInt(numStr16, 16);

dataView.setUint8(numTitle, num1);

numTitle++;

}

return buffer;

},

能够接受到返回值，可是设备就是没有响应，但同事用app下发相同指令，设备会有滴一声的响应，请问各位大佬，我是哪里写的有问题吗？