The data which I receive has a header that is of a particular pattern of bits like 100110011001100...You are right that I will face issue detecting the pulse start, when I place the RFID card near the antenna, I will receive a stream of data and all the other time I'll have a stream of 1s only.
So, using that I would know the start of data but to sync as u said ill definitely need the sync/clk pulse. My first aim was to detect at regular intervals without error, I got that part and now I'm working on the sync.
I'm going to use pin 2 of the arduino for the RDY/CLK signal so as to sync with my detected data but in order to make it independent of EM4095 module(which doesn't look like possible as of now) I'll work on it after I achieve the sync(using SPI??) Could u please suggest a way to do that?
Also, for the other module, I will be generating my own 125kHz clock signal using the same Arduino that I use to read the data back, so I think in that way sync will be there in that case as the clock source is also the same MCU.
Thanks Tom.