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brianrho / FPM

Arduino library for the R30x/ZFMxx/FPMxx optical fingerprint sensors
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Touch #7

Closed beryindo closed 6 years ago

beryindo commented 6 years ago

How to Use Touch PIN?

brianrho commented 6 years ago

What touch pin?

edautz commented 5 years ago

How to Use Touch PIN?

https://github.com/brianrho/FPM/issues/4#issuecomment-467225878

devegied commented 4 years ago

FPM10A Fingerprint Reader Sensor Module from AliExpress have two more pins: T-OUT and T-3V3. These are for integrated touch sensor. I done some RE on part of sensor: Schematic The 233DH TonTouch IC is used for touch sensor and with this configuration (TOG - low, AHLB - high) on output T-OUT we should get HIGH when there is nothing on fingerprint sensor and LOW when finger is on the sensor.