小程序蓝牙读数据

如何看待微信公开课小程序热门讨论「小程序蓝牙读数据」
摘要：小程序蓝牙读数据
展开：readBLECharacteristicValue:function(deviceId,serviceId,characteristicId,callback){wx.onBLECharacteristicValueChange(function(characteristic){console.log(characteristicvaluecomed:);letbuffercharacteristic.value;letdataViewnewDataView(buffer);console.log(接收字节长度:+dataView.byteLength);console.log(dataView.getUint8(0));console.log(dataView.getUint8(1));callback(dataView);});wx.readBLECharacteristicValue({//这里的deviceId需要在上面的getBluetoothDevices或onBluetoothDeviceFound接口中获取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:characteristicId,success:function(res){console.log(readBLECharacteristicValue:,res)}})}设备一直在广播数据，这里的readBLECharacteristicValue要轮询么譬如1s钟调用一次，还是不需要轮询，调用一次后，只要有数据就会进wx.onBLECharacteristicValueChangewx.onBLECharacteristicValueChange这个函数的回调函数参数characteristic.value该如何显示了解更多