Sir, this is my project and kindly need your help. i have 2 RFID MRC522 and 1 arduino. i will declare the reader as RFID1, RFID2 and the tag, TAG1 and TAG2. so i want each RFID will connect in 1 arduino. that i want to ask, how i initiate the RFID in arduino? because i need a tag that detected by the RFID will known detecting by RFID 1 or RFID 2. so TAG1 will detected from RFID2 and TAG2 will detected from RFID2 or TAG1 detected from RFID2 and TAG2 detected from RFID1 thats the general description, Thank you Sir..