Actually i am working on one project where i need to send hexadecimal data array like A= {0x7A, 0xEE} from arduino, so when i sent this data and obeserved it in oscilloscope then i discovered that there is extra hex data sent with it. Like A={0x7A, 0xEE, 0x52}. Could you explain me from where this data came from and what is the signification of it? Is it synchro byte?