function setNotifyListen(item) {

uni.onBLECharacteristicValueChange(function(res) {

clearReSendTimer()

if (res != null && res.deviceId === item.mac &&

res.serviceId === serviceUUID &&

res.characteristicId === notify_write_uuid &&

res.value != null) {

var tempList = new Uint8Array(res.value)

if (tempList[4] != 8) {

//发送成功,收到回复索引加1

seqIndex++

}

BleDataUtils.toByteArrAndCheck(item, res.value)

} else {

disConnectBleDevice(item)

}

})

}