Neat idea. What about eavesdropping on the signal? IIUC that's one of the reasons NFC has such a short range.
You noted that 21-22 inches allows reliable reception. Would it be possible by changing volume/frequency/encoding to tune the reliable reception range down to say 10-12 inches and make it difficult to receive (< 99% chance of reception) your signal by the person behind you in the checkout line (post covid, so they aren't 6 feet away from you 8-).
You mention being able to transmit images. Is the data rate high enough that it could be used to replace bluetooth for sending a business card or resume? Also I assume it can be used for broadcast. I was thinking of sharing a business card to 3 or 4 people at the same time.
Thanks for the writeup.
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Neat idea. What about eavesdropping on the signal? IIUC that's one of the reasons NFC has such a short range.
You noted that 21-22 inches allows reliable reception. Would it be possible by changing volume/frequency/encoding to tune the reliable reception range down to say 10-12 inches and make it difficult to receive (< 99% chance of reception) your signal by the person behind you in the checkout line (post covid, so they aren't 6 feet away from you 8-).
You mention being able to transmit images. Is the data rate high enough that it could be used to replace bluetooth for sending a business card or resume? Also I assume it can be used for broadcast. I was thinking of sharing a business card to 3 or 4 people at the same time.
Thanks for the writeup.