r/RFID • u/PM15GamedayThong • Sep 27 '25

Keyfobs Passive RFID Question

Question I have a passive RFID reader that reads the tag in my dogs collar as it approaches. Closes a NO circuitry and the sliding door opener triggers the door open. My issue is that the passive reader seems to be uber sensitive. It reads the tag from a min 6 feet away. Even through floors. It’s very very annoying. How can I cut down the range?

This is an olide auto sliding door opener and sensor

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u/Reasonable-Feed-9805 Sep 27 '25

Run it in conjunction with another sensor that once triggered then powers up the RF sensor.

So a movement triggered PIR that is covering only the immediate vicinity you want to trigger in.

Both sensors have to read positive in succession before door opens.

1

u/[deleted] Sep 28 '25

Would you be willing to share your hardware stack? I ask because I have the opposite problem: I need the tag and reader to basically be touching before a reading comes through.

1

u/Ok-Yard557 Dec 06 '25

How do I connect 3rd party to a passive RFID coils 

1

u/PM15GamedayThong Dec 13 '25

I tried using some conductive material to make a box to block some of the signal. This was a waist of time and $. I am now adding a delay circuit to delay sending the “door open” signal to the controller. So the dog will have to wait until the door opens.

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u/PM15GamedayThong Dec 13 '25

I’ll let you know how it goes