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hi all

How can i increase number of captured fingers in my fingerprint sensor ?
my fingerprint sensor type GT-511 connected to arduino UNO
it is available only 20 fingerprints in its internal database

please any idea ?
this is what i was worked in
Playing with finger print scanner (FPS) on arduino | Homautomation[^]

1 solution

Looking at the datasheet for the device, you can't. It will not use an off-device database to verify fingerprints against. It will only use it's internal database of a max of 20 prints.

Now, you can also download the current database and upload a new one, expanding the range of fingerprints you can check against but this seems like it would be a slow process and possibly require multiple retries by the user to verify.

Really, if you need more than 20 you need a better device. This device is intended for hobbyist use or small projects.

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