RFID reader and erronious reads

Jason-WI

We are using the Parallax RFID reader and the 1" round sticker RFID tags to track insertions on optical loopbacks. The reader everynow and then will pickup a reading eventhough there isn't a RFID tag around. I am using a PIC controller and then serial out to a PROP plug to do the serial/USB conversion. I have error checking to an online database so I know that these erronious reads are not in the database but is this something that other RFID users are seeing? This is a rev 1 RFID reader if that matters. I·have plenty of decoupling caps throught the circuit and at every IC.

Jason

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He who dies with the most toys wins!

dandreae

What type of reading shows up, is it the same as the previous number?·

Dave

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Dave Andreae

Parallax Tech Support·

Jason-WI

It's not the previous number. It contains mostly zeros. I will check the error log of the VB app I created to communicate with the SQL database to see if there is more info tha I can give you.



Jason

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He who dies with the most toys wins!

dandreae

I found out that this·is not a new issue. The RFID antenna/receiver is just processing

extraneous noise as a tag. If you are using a look-up table· to

compare the readings to a valid list of tags, they should just be able to

ignore any of the invalid readings generated from noise. Basically, chiming when

there is an invalid tag is not very practical due to the spurious/noisy

readings that may occur (this is an artifact of any RF system).



Dave

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Dave Andreae

Parallax Tech Support·