RFID module connection

Discussion in 'General Electronics Chat' started by geethucmohan1992, Feb 23, 2013.

  1. geethucmohan1992

    Thread Starter New Member

    Dec 27, 2012
    7
    0
    I am doing a project on RFID based shopping cart...but now am having trouble connectiong RFID module to the microcontroller(AT89S52/AT89C52) am using.
    The RFID module i purchased consists of EM-18 reader module and it has been connected to max232 and then to RS-232...so the module has rs232 output..now can i connect directly from rs232 to tx pin of microcontroller? or is there another way?
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    Remove the MAX232 chip and jumper across the appropriate pins.
    Check that the voltage supply voltage on the RFID module matches that on the microcontroller.
     
  3. geethucmohan1992

    Thread Starter New Member

    Dec 27, 2012
    7
    0
    Thak you for replying
    After removing max232, can i connect directly to Tx pin?
    The problem is, i already have a transmitter to be connected to that pin.
     
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