readData.setOnClickListener {
            Log.d("Archer","readData")
                if (mBle.connetedDevices.size > 0) {
                    Log.d("Archer","connetedDevices：${mBle.connetedDevices[0].bleName}")
                   var result = mBle.read(mBle.connetedDevices[0],object :BleReadCallback<BleDevice>(){
                        override fun onReadSuccess(characteristic: BluetoothGattCharacteristic?) {
                            super.onReadSuccess(characteristic)
                            var data = characteristic?.value
                            Log.d("Archer","onReadSuccess: ${Arrays.toString(data)}")
                        }
                    })

                    if(!result){
                        Log.d("Archer","read data fail!")
                    }
                }
        }