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Is possible to use MFRC522 or CLRC661 in Remote Keyless Entry systems ?

Question asked by Daniel Flor on Apr 1, 2020
Latest reply on Apr 3, 2020 by IvanRuiz

Hello,

I need a system able to identify frequencies of remote control keys( car key fobs ), I found that the frequencies of Remote Keyless Entry  (RKE) most used are 315MHz in the  US/Japan and 433.92MHz (ISM band) in Europe, and can be ASK or FSK. The device will need to inform in which frequency the key fob is.

The other day I saw a device using the MFRC522 CI to  recognize these frequencies. So, I would like to know, is it possible to use this IC or its newest version, the CLRC661, to identify and differentiate the presence of these different frequencies?

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