SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-18T21:40:33-06:00SparkFun ElectronicsCustomer #1504914 on SEN-14518 - Fingerprint Scanner - TTL (GT-521F32)Customer #1504914urn:uuid:24effc8d-1479-6b9d-f9eb-c0f24984b08c2019-02-25T09:53:06-07:00<p>Can I use it with Hardware Serial on the ESP32 and program it on Arduino IDE?</p>
Customer #57306 on SEN-14518 - Fingerprint Scanner - TTL (GT-521F32)Customer #57306urn:uuid:f0c8a782-7bbc-5229-b86a-942908e6b8ae2018-12-30T07:53:16-07:00<p>Clarification, in case the following is an issue for anyone: First- YES, it remembers the "fingerprints" you asked it to, even across the power going off and then on again. BUT: It is NOT storing images of the fingerprint. It does a mathematical thing when you show it a fingerprint, and it remember the result of that. When you later show it a new fingerprint scan, and ask "do you know this?", it does the mathematical thing again, and checks the answer obtained from the new scan to the answers from old scans. It only stores the answer from the "thing".... BUT, BUT.... Yes: It CAN "give you" a copy of a scan, a copy of the raw image, as captured. (Being able to see the raw images is very useful when you are learning how to "do it".) And you can save that. But the device is not storing the fingerprints, in their raw form.</p>
LJC41 on SEN-14518 - Fingerprint Scanner - TTL (GT-521F32)LJC41urn:uuid:7fceaef7-06e5-b187-79bd-6b480c7ed2e22018-12-06T08:51:24-07:00<p>is there a way using arduino code to put it in standby? Im using the FPS_GT511C3 library and it doesnt appear to be a function to do this but the data sheet shows there is a stanby. With an arduino pro mini and Fingerprint Scanner - TTL (GT-521F32), im drawing around 100 mA continuously and im worried about battery drain being to fast. The FPS is drawing about 70 mA alone. Any help or pointing me to a website would be greatly appreciated!!</p>
Customer #1417765 on SEN-14518 - Fingerprint Scanner - TTL (GT-521F32)Customer #1417765urn:uuid:24aea129-dd59-fd57-7e00-f4b40dd12b892018-08-09T12:55:04-06:00<p>I probably missed it or it's assumed and stupid to ask, but ... what memory type stores fingerprints? Do I need to re-enroll all the fingerprints after power shutdown? Thanks
UPDATE: It does ... found it on your great youtube video :) https://www.youtube.com/watch?v=PPNoO5uaUhM</p>