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Optical fingerprint / biometeric sensor module – FPM10A with TTL/UART interface with full firmware support and a windows fingerprint capture software.
Notes:
Remove cable and under the connector you should find pin 1 mark. GND pin should have 0 ohms resistance with on board tantalum capacitors negative terminal.
FPM10A Arduino Library Windows Fingerprint Capture Software FPM10A Datasheet
VCC (RED) GND (BLACK) RXD (YELLOW) TXD (GREEN)