writeBLE(buffer) {

        let that = this;

        var uint8Buf = that.sr2ab(buffer);

        

        wx.writeBLECharacteristicValue({

            deviceId: this._deviceId,

            serviceId: this._serviceId,

            characteristicId: this._characteristicId,

            value: uint8Buf,

            success(res) { 

              // console.log(res, 'resres');

            },

            fail: function (res) {

                console.log(res, 'fail');

                that.blueFalid('Wi-Fi名称或者密码输入错误!')

            }

        })

    }

通过setInterVal每5秒调用一次，过一会儿会报这个错误。