小程序蓝牙读取数据,监听返回000000000000000000什么情况

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摘要：小程序蓝牙读取数据,监听返回000000000000000000什么情况
展开：write:function(){varthatthis;varbuffernewArrayBuffer(16)vardataViewnewDataView(buffer)varstr0xd3,0x80,0x60,0x79,0x76,0xc9,0xdd,0x46,0xe5,0x18,0xf4,0x31,0xf6,0x4e,0xb6,0x44;vararrstr.split(,)varval;for(vari0;iarr.length;i++){valparseInt(arr[i],16)dataView.setInt8(i,val);}wx.writeBLECharacteristicValue({deviceId:that.data.deviceId,serviceId:that.data.services,characteristicId:that.data.characteristicsFEC7,value:buffer,success:function(res){console.log(res,writeBLECharacteristicValuesuccess);wx.onBLECharacteristicValueChange(function(res){console.log(writeaaaaaaaaa:,res);varbufferArray.prototype.map.call(newUint8Array(res.value),x(00+x.toString(16)).slice(2)).join();console.log(buffer)})wx.notifyBLECharacteristicValueChange({state:true,//启用notify功能deviceId:that.data.deviceId,serviceId:that.data.services,characteristicId:that.data.characteristicsFEC8,success:function(res){console.log(notifyBLECharacteristicValueChangesuccess,res.errMsg)},fail:function(res){console.log(notifyBLECharacteristicValueChangefail,res.errMsg)}})},fail:function(res){console.log(res,bufffail)}})},read:function(){varthatthis;wx.onBLECharacteristicValueChange(function(res){console.log(write:,res);varbufferArray.prototype.map.call(newUint8Array(res.value),x(00+x.toString(16)).slice(2)).join();console.log(buffer)//constblueArrayBuffernewUint8Array(res.value);//constbase64Strwx.arrayBufferToBase64(blueArrayBuffer);//console.log(base64Str)})//读取低功耗蓝牙设备的特征值的二进制数据值wx.readBLECharacteristicValue({deviceId:that.data.deviceId,serviceId:that.data.services,characteristicId:that.data.characteristicsFEC9,success:function(res){console.log(readBLECharacteristicValue++++++++++++++++++++++:,res)},fail:function(res){console.log(readBLECharacteristicValuefail:,res)},})},为什么写入后读取的console.log(buffer)是000000000000000000000000000000000000求助