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I have 125KHz RFID Reader. Why does it fail to read more than one tag at a time? How can I program it for reading multiple tags? Is it possible to add an anticollision protocol there?

Mad Physicist
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varad P
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1 Answers1

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You are probably not using a reader and tag that is capable of anti-collision protocol. Without that capability the tags answer at the same time and interfere with each other's signals.

Anti-collision is not common with LF RFID.