Optical Fingerprint Sensor (UART, 1000 Fingerprints)

Optical fingerprint module stores up to 1000 fingerprints and communicates via UART. Compatible with Arduino and similar microcontrollers for access control and security applications.

Logical pinout · physical placement not verified

GND1
Signal ground, documented by DFRobot SEN0188 pinout as cable position 1, black wire.
Type · Ground
RD2
UART receive/data input, TTL logical level, documented as cable position 2, white wire.
Type · SignalVoltage · TTL logical level
TD3
UART transmit/data output, TTL logical level, documented as cable position 3, green wire.
Type · SignalVoltage · TTL logical level
VIN4
Power input, documented as cable position 4, red wire.
Type · Power
SOUT5
Induction signal output, documented as cable position 5, yellow wire.
Type · Signal
VTOUCH6
Touch induction power input, documented as cable position 6, blue wire.
Type · Power

Pin	Position	Type	Function	Voltage
GND	1	Ground	Signal ground, documented by DFRobot SEN0188 pinout as cable position 1, black wire.
RD	2	Signal	UART receive/data input, TTL logical level, documented as cable position 2, white wire.	TTL logical level
TD	3	Signal	UART transmit/data output, TTL logical level, documented as cable position 3, green wire.	TTL logical level
VIN	4	Power	Power input, documented as cable position 4, red wire.
SOUT	5	Signal	Induction signal output, documented as cable position 5, yellow wire.
VTOUCH	6	Power	Touch induction power input, documented as cable position 6, blue wire.

Logical pinout · physical placement not verified

Pin details

6 connections

GND
Signal ground, documented by DFRobot SEN0188 pinout as cable position 1, black wire.
Ground
1
RD
UART receive/data input, TTL logical level, documented as cable position 2, white wire.
SignalVoltage · TTL logical level
2
TD
UART transmit/data output, TTL logical level, documented as cable position 3, green wire.
SignalVoltage · TTL logical level
3
VIN
Power input, documented as cable position 4, red wire.
Power
4
SOUT
Induction signal output, documented as cable position 5, yellow wire.
Signal
5
VTOUCH
Touch induction power input, documented as cable position 6, blue wire.
Power
6

Start wiring

UART · I2C · Analog · 3.3 – 5 V · Breakout

Verify supply voltage and logic levels before powering up.

Module pins: VIN, VTOUCH, GND, RD, TD, SOUT. Schematik maps them to your board in the app.

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