What does the spark 2 do

Hi I’ve heard a lot about the spark 2 chip and I was wondering what it does and is used for

Have a read of this, and then come back with any questions that it doesn’t answer or that you are not sure about.


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So I see the next chip and the spark 2 come as a package what is the benefit of having both

And what is difference in nfc and RFID I’ve been researching it and it says there pretty much the same thing

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