RFID Reader Module..... HELP...

fiveslo

Just received my new RFID Reader Module, and I'm having problems already... the module itself works with the demo programs, or at least sort of... I also purchased five of the rectangular RFID cards... that's where my problem exists.... I can read and display the cards unique IDs with the example code provided:

Main:
· LOW Enable
· SERIN RX, T2400, [noparse][[/noparse]WAIT($0A), STR buf\10]
· HIGH Enable
· DEBUG "Tag Identification number is: "
··· FOR idx = 0 TO 9
······· DEBUG DEC buf(idx)," "
··· NEXT
· DEBUG CR
· PAUSE 500
· GOTO main

Using the above program I get these values reported to the DEBUG screen....

Tag Identification number is: 48 70 48 50 54 48 55 65 54 68
Tag Identification number is: 48 70 48 50 54 48 55 65 54 68
Tag Identification number is: 48 70 48 50 54 48 55 68 65 65
Tag Identification number is: 48 70 48 50 54 48 55 57 53 57
Tag Identification number is: 48 70 48 50 54 48 55 69 67 48
Tag Identification number is: 48 70 48 50 54 48 55 53 50 55

I tried putting these values (in both Hex and Dec formats) into the lock/unlock program for the RFID that is the documents, however, I still cannot get the RFID to respond....How do I use these values to run the lock/unlock program.· Also in the N/V article, I noticed Jon used, a MAX232 to convert the output so that it could be viewed on Hyperterminal?? I think??? But when I looked closer I swore I saw that it was actually the DEBUG screen.... Am I seeing things???· The values I see in the N/V article actually compare more closely than the values I'm getting... HELP... what am I doing wrong.... Rob

Newzed

Go to this link and look at the sample code I posted for the BS2E:

http://forums.parallax.com/forums/default.aspx?f=21&m=74727

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Sid Weaver
Do you have a Stamp Tester yet?
http://hometown.aol.com/newzed/index.html

·

Jon Williams

You can convert that snippet of code like this to make the output compatible with the other demos:

Main:
· LOW Enable
· SERIN RX, T2400, [noparse][[/noparse]WAIT($0A), STR buf\10]
· HIGH Enable
· DEBUG "Tag Identification number is: "
··FOR idx = 0 TO 9····························
··· DEBUG buf(idx)
··NEXT
· DEBUG CR
· PAUSE 500
· GOTO Main

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Jon Williams
Applications Engineer, Parallax

fiveslo

Thanks both Jon and Sid... it works.... I adopted the simple code conversion that Jon provided and then simply put in the codes that my RFID cards generated... Jon: the interesting thing is that how the removal of the " " in the line: DEBUG DEC buf(idx)," "· changed the output... what really happened here???? Now for some improvising and changing of names in the code... since no one from the White House will be given these cards [noparse]:)[/noparse].... Thanks again... Rob

Jon Williams

What really happened? Well, the RFID sends out its ID string as text, and that is the default method for DEBUG. Do by removing the DEC operator and the space between characters you can see the actually 10-character string that is sent by the RFID.

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Jon Williams
Applications Engineer, Parallax