Now i realized that serial data couldn’t be realtime. Because of the serial buffer mechanism when i start get location command like lep in listener mode coordinates became flow in uncertain timeframe and this data has no timestamp. When you listen it from serial you did not get the new data , you get the data waiting in queue 
Now finally if we want to use this MDEK system with realtime tracking we need a sytem works with callbacks. Same problem could still in SPI communication too. Because it works with TVL frames not addresses and registers.
I’m waiting for the new firmware for MDEK1001 to make that happen. We need to read datas with timestamped and if possible reading accelerometer data realtime remotely will be good.