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Fingerprint Scanner (GT-521Fxx) Hookup Guide
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Test of the GT-521F52 fingerprint reader
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GT-521F32 Finger Print Sensor Module Pinout, Features, Datasheet, Working, Application, Alternative
Fingerprint Scanner - TTL (GT-521F32)
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GitHub - sparkfun/Fingerprint_Scanner-TTL: Repository with example code for SEN-14585 & SEN-14585 at SparkFun.com
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