So i have completely no idea on how to use the RFID reader module.

Freezepop · 2007-09-11 05:06

I'm new at this kind of things so I'm not really sure to do with the RFID reader, for example to place what pin to where etc;
Keep in mind right now I'm so new to this this module just seems like a card to me.

Any help would be appreciated, thanks.

Franklin · 2007-09-11 23:25

This should help www.parallax.com/dl/docs/prod/audiovis/RFID-Reader-v1.2.pdf

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- Stephen

Freezepop · 2007-09-12 05:09

I seriously have no idea where Pin 2 and 3 go even after reading that, bah I really suck at this

Morrolan · 2007-09-12 11:20

OK, so you've bought the RFID reader card but don't know what to do with it, right?

Are you connecting it to a BASIC Stamp? If so, which model?

On the basic stamp, each pin has a pin number and an ID, ok?

The easiest way to experiment with this is to use a breadboard, or the Board of Education or the BS2 demo board.

OK, so pin 1 has to be wired to a power supply - take care, do not wire the thing to the mains, it must be wired to either a 5v DC supply, or if using a basic stamp connect it to VDD (pin 21).

Pin 2 has to be wired to an I/O pin on a basic stamp in order to turn it on/off and cha nge it's modes.

Pin 3 is the serial in - this is the pin that will transmit data about the RFID tag to the stamp.

Pin 4 is GND, so wire that to VSS.

It would help if you told us exactly what you are trying to do with it, and we can then help you more [noparse]:)[/noparse]

Kind Regards,
Morrolan

Freezepop · 2007-09-12 11:25

Yup I'm using the BS2p24 Stamp, i need to connect it so that I can read these World tags I have

Morrolan · 2007-09-12 15:02

OK that's fine.

Look at this:

www.parallax.com/dl/docs/prod/schem/BS2p24SchematicRevD.pdf

That's the schematic and pin-out for your Stamp. When Stamp pins are referred to, this is what we mean.

Do you have a piece of breadboard or other prototyping board?

The more information you give us, the more we'll be able to help you

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Freezepop · 2007-09-12 15:56

Oh ok, I'm understanding this quite bit more now, currently I also have a 24pin carrier board along with an RF transceiver. Along with a normal piece of bread board and solder.

Post Edited (Freezepop) : 9/12/2007 4:11:49 PM GMT

walice_drel · 2007-09-12 19:51

. I have to go to work but when I get back I will post a pic of how you connect it to the board and the code you will need

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Post Edited (walice_drel) : 9/12/2007 7:58:37 PM GMT

Freezepop · 2007-09-13 10:52

That would be amazing if you could do that for me!

walice_drel · 2007-09-13 16:08

Here is the a video, pic and code.

Here is a video

http://mlab.uiah.fi/paja/wp-content/uploads/2007/02/rfid.mov

' -----[noparse][[/noparse] Program Description ]---------------------------------------------
'
' Reads tags from a Parallax RFID reader and displays ID to debug screen


' -----[noparse][[/noparse] Revision History ]------------------------------------------------


' -----[noparse][[/noparse] I/O Definitions ]-------------------------------------------------

Enable          PIN     0                       ' low = reader on
RX              PIN     1                       ' serial from reader



' -----[noparse][[/noparse] Constants ]-------------------------------------------------------

#SELECT $STAMP
  #CASE BS2, BS2E, BS2PE
    T2400       CON     396
  #CASE BS2SX, BS2P
    T2400       CON     1021

#ENDSELECT

Baud            CON     T2400

LastTag         CON     3


#DEFINE __No_SPRAM = ($STAMP < BS2P)            ' does module have SPRAM?


' -----[noparse][[/noparse] Variables ]-------------------------------------------------------

#IF __No_SPRAM #THEN
  buf           VAR     Byte(10)                ' RFID bytes buffer
#ELSE
  Char       VAR     Byte                    ' character to test
#ENDIF

tagNum          VAR     Nib                     ' from EEPROM table
idx             VAR     Byte                    ' tag byte index



' -----[noparse][[/noparse] Initialization ]--------------------------------------------------

Reset:
  HIGH Enable                                   ' turn of RFID reader



' -----[noparse][[/noparse] Program Code ]----------------------------------------------------

Main:
  LOW Enable                                    ' activate the reader
  #IF __No_SPRAM #THEN
    SERIN RX, T2400, [noparse][[/noparse]WAIT($0A), STR buf\10]    ' wait for hdr + ID
  #ELSE
    SERIN RX, T2400, [noparse][[/noparse]WAIT($0A), SPSTR 10]
  #ENDIF
  HIGH Enable                                   ' deactivate reader

Display_Tag:
  DEBUG "Tag Identification number is: "
    FOR idx = 0 TO 9                            ' scan bytes in tag

      #IF __No_SPRAM #THEN
        DEBUG DEC buf(idx)," "
      #ELSE
        GET idx, Char                        ' read char from SPRAM
        DEBUG DEC Char," "
      #ENDIF
    NEXT
  DEBUG CR
  PAUSE 500
  GOTO main                              ' repeats code

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Post Edited (walice_drel) : 9/13/2007 4:32:34 PM GMT

walice_drel · 2007-09-13 16:40

I would also recommend buying this

http://www.parallax.com/detail.asp?product_id=90005

It will show you everything you need to know.

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Freezepop · 2007-09-15 05:50

All right I'll try it as soon as I get my serial cable

Freezepop · 2007-09-15 21:23

OK every thing seems to work fine, now is there a way for the reader to add or count?

For example 5 tags are going around and as soon as tag 1 goes the 5th round(every multiple of 5?), X happens to tag 1 then goes back to whatever it does.

I also have an RF transmitter and receiver if I need to use them

Freezepop · 2007-09-17 11:06

Hmm I can make the Stamp count but is there a way for it to assign a different variable to each tag?

For the multiples of 5 part I could put

#if var//5=0 right?

Post Edited (Freezepop) : 9/17/2007 11:13:00 AM GMT

So i have completely no idea on how to use the RFID reader module.

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