let buffer = new ArrayBuffer(4)     let dataView = new DataView(buffer)     console.log(dataView)     dataView.setUint8(0, 0XFA)     dataView.setUint8(1, 0x01)     dataView.setUint8(2, 0x01)     dataView.setUint8(3, 0XAF)     wx.writeBLECharacteristicValue({       deviceId: this._serviceId,       serviceId: this._deviceId,       characteristicId: this._characteristicId,       value: buffer     }) 返回10002异常