hai………… AT89C51 | Microcontroller › 8051 › Want to interface GPS & RFID modules at the same time. › hai………… AT89C51 January 14, 2013 at 12:58 pm #8954 nidhin.kParticipant hai………… AT89C51 micro controller has only 1 serial. In your project consist of 2 serial device…. so u must use a switching relay for using 2 serial device…… but at a time u can use one device only…..
