I have arduino pro miniArduino Pro Mini, hcHC-06 bluetooth module, and mifair rc522 rfidMifare RC522 RFID reader. Bluetooth module connects to serial port, and rfidRFID connects to sdaSDA, sckSCK, mosiMOSI,miso MISO, ground, reset, and 3.3v3V pins. I want to know if there might be a conflict between rfidRFID reader and atmegaATmega serial port. The reader will be used for reading and wiring cards. Bluetooth is there for monitoring.