Cytron Technical Forum

Could it possible to link my rfid DB9 to (UART to RS232 Converter),Then the UART will transmit the Tx signal goes to Rx(out) in Max232.After that the Max232 transmit the Rx(in) to it's DB9 (female) at pin 3.lastly,The (usb to db9-male conveter) which db9 (male) will connect the db9 (female) in Max232 and usb will connect to usb port at Pc.
Am i correct?

pikachuX WROTE:Could it possible to link my rfid DB9 to (UART to RS232 Converter),Then the UART will transmit the Tx signal goes to Rx(out) in Max232.After that the Max232 transmit the Rx(in) to it's DB9 (female) at pin 3.lastly,The (usb to db9-male conveter) which db9 (male) will connect the db9 (female) in Max232 and usb will connect to usb port at Pc.
Am i correct?

I have try this, RFID DB9 convert to UART using the schematic below, then RC7_A connect to (RX) UART to USB converter, and then connect to PC. You can check data using HyperTerminal.
My method: RFID MAX232 (DB9) > UART > USB > PC
Your method: RFID MAX232 (DB9) > UART > MAX232 > USB > PC


If you don't know which wire (RFID DB9) you need to connect at the schematic above, you can refer PR8.

Wow~Your method more simple than me,mean that i just need to use the USB to UART converter after the RFID DB9 is convert to UART?
USB to UART converter : http://www.cytron.com.my/viewProduct.php?pcode=UC00A?

How if i follow my previous step : RFID MAX232 (DB9) > UART > MAX232 > USB > PC ?
Could it work because the DB9 (female) receiver at the max232 connect R1(out) From PIC and R2(out) FROM RFID?

Not so sure what you want. Anyway, if you wish to connect the RFID reader RS232 (RFID-IDR-232N) to PC by using USB, you can use USB to Serial Converter (WR-USB-SERIAL) http://www.cytron.com.my/viewProduct.php?pcode=WR-USB-SERIAL. It is straight forward.

hyng WROTE:Not so sure what you want. Anyway, if you wish to connect the RFID reader RS232 (RFID-IDR-232N) to PC by using USB, you can use USB to Serial Converter (WR-USB-SERIAL) http://www.cytron.com.my/viewProduct.php?pcode=WR-USB-SERIAL. It is straight forward.

Do we change the settings of this com port(e.g Baudrate) or just leave it as it is initially? because i already tried this method but it unable to show a tag cards ID

Din the RFID manual or datasheet tell you the baudrate of it? Check it!

What is the terminal window/software you are using to look at the ID?

i know the settings of Rs232 communication cytron.com.my/viewProduct.php?pcode=RFID-IDR-232N&name=RFID Reader RS232 (New)

i use vb6 to check the ID and it works with the original rs232 serial connection.

but using it with rs232 to usb converter, the ID doesnt show anymore.So they must be some interfacing problems.

Your VB does not set the baudrate? There must be baudrate. Have you install the driver for the USB to RS232? Try the loop back test.

i already did...like initially set to

i) Baud rate (Bits per second) = 9600
ii) Data bits = 8
iii) Parity = None
iv) Stop bits = 1
v) Flow control = None

my question is do we need to change any of the above, when using usb/rs232 converter?

Nop, if that setting works on VB, it should work at other software. I don have RFID reader, so cannot check whether that is correct setting, but since that works, I am assuming it is correct.