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How to link Arduino Uno with RFID reader?

PostPosted: Mon Dec 10, 2012 5:23 pm
by musofa81
Hi, I would like to know on how to establish a connection between Arduino Uno with RFID reader thru coding? Is it the board can be connected to any RFID reader? If yes how can I make use of pin 0 (RX) for receiving and pin 1 (TX) for transmitting? Now the reader is connected to the board via UART to RS232 Converter. Really appreciate if someone could help me. Thanks.

Re: How to link Arduino Uno with RFID reader?

PostPosted: Mon Dec 10, 2012 5:36 pm
by zhenning

Re: How to link Arduino Uno with RFID reader?

PostPosted: Mon Dec 10, 2012 5:59 pm
by robosang
Which RFID reader oh?

Re: How to link Arduino Uno with RFID reader?

PostPosted: Tue Dec 11, 2012 11:31 am
by musofa81
I am using ACR122S NFC Contactless Smart Card Reader.

Re: How to link Arduino Uno with RFID reader?

PostPosted: Wed Dec 12, 2012 7:56 am
by robosang
Link please?

Re: How to link Arduino Uno with RFID reader?

PostPosted: Wed Dec 12, 2012 12:24 pm
by musofa81
robosang WROTE:Link please?


The link is http://www.acs.com.hk/index.php?pid=pro ... id=ACR122S

Re: How to link Arduino Uno with RFID reader?

PostPosted: Wed Dec 12, 2012 2:26 pm
by robosang
Basically, UNO is a microcontroller. Yes, you can connect it to the RFID, but level shifter is needed.

You should check some of related articles from Cytron:
http://tutorial.cytron.com.my/2011/12/08/control-and-monitor-via-sms/
http://tutorial.cytron.com.my/2012/07/30/wireless-rfid-reader-using-xbees/

Re: How to link Arduino Uno with RFID reader?

PostPosted: Wed Dec 12, 2012 5:03 pm
by musofa81
robosang WROTE:Basically, UNO is a microcontroller. Yes, you can connect it to the RFID, but level shifter is needed.

You should check some of related articles from Cytron:
http://tutorial.cytron.com.my/2011/12/08/control-and-monitor-via-sms/
http://tutorial.cytron.com.my/2012/07/30/wireless-rfid-reader-using-xbees/


May I know, what do u mean by level shifter is needed? By the way thanks for the link.

Re: How to link Arduino Uno with RFID reader?

PostPosted: Wed Dec 12, 2012 6:28 pm
by zhenning
musofa81 WROTE:
robosang WROTE:Basically, UNO is a microcontroller. Yes, you can connect it to the RFID, but level shifter is needed.

You should check some of related articles from Cytron:
http://tutorial.cytron.com.my/2011/12/08/control-and-monitor-via-sms/
http://tutorial.cytron.com.my/2012/07/30/wireless-rfid-reader-using-xbees/


May I know, what do u mean by level shifter is needed? By the way thanks for the link.


Level shifter is a converter that converts your voltage level just like max232 from TTL to RS232 level

Re: How to link Arduino Uno with RFID reader?

PostPosted: Fri Dec 14, 2012 8:15 pm
by low5545
Try to refer its communication protocol: http://www.acs.com.hk/drivers/eng/CMP_ACR122S_v2.00.pdf

Basically, UNO is a microcontroller. Yes, you can connect it to the RFID, but level shifter is needed.

You should check some of related articles from Cytron:
http://tutorial.cytron.com.my/2011/12/0 ... r-via-sms/
http://tutorial.cytron.com.my/2012/07/3 ... ing-xbees/

Ya, you need a RS-232 to TTL converter, because the RS-232 protocol is running on 12V, while TTL at 5V. Using a MAX232 IC should do it.