this post was submitted on 23 Oct 2023
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NFC for static storage? (self.embedded_prog)
submitted 1 year ago by mobergmann to c/[email protected]
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I have an idea in mind, where I want to share "large" static amounts of data (at max 10mb). Are there NFC-"Tags" which can hold that amount of data, or even more (in the Gigabytes)? If so, which ones and do you have experience with them?

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[โ€“] ttmrichter 4 points 1 year ago* (last edited 1 year ago) (1 children)

The largest passive tag I've ever even heard rumours of could store a whopping 8192 bytes. (8KB.) And that was "wait, are you making this of gold?!"-grade expensive.

If you want something that's self-powered and has its own processor, NFC peer-to-peer essentially allows for any size you care to stand there and transfer. At a maximum transfer rate of 424Kbit/s, however, you're going to be standing there for quite a long time transferring even 10Mbits of data. That's about 25 seconds of holding the devices close together. (You can scale that for Gbits...)

...edited to add because of fumble-fingers...

You'd be better off using NFC to bootstrap a more robust, higher-speed connection. Use the NFC as the identification phase of bootstrapping a secure, say, Bluetooth connection or the like.

[โ€“] mobergmann 2 points 1 year ago* (last edited 1 year ago)

I already feared that, but thanks for the answer!

however, you're going to be standing there for quite a long time transferring even 10Mbits of data. That's about 25 seconds of holding the devices close together. (You can scale that for Gbits...)

Yea, 25 seconds is way to long.

You'd be better off using NFC to bootstrap a more robust, higher-speed connection. Use the NFC as the identification phase of bootstrapping a secure, say, Bluetooth connection or the like.

I guess I will look into stuff like that.