The DFRobot SEN0188 fingerprint sensor can capture and store up to 1,000 fingerprints, which it can compare or search in its database. Its built-in DSP processor enables standalone operation without a computer and communication via UART with Arduino and other serial devices. It recognizes fingerprints in both damp and dry conditions and can be used for access control applications or as an alternative to IC cards, passwords, and hardware switches.

It supports 1:1 comparison and 1:N search. Image capture takes less than 1 s, while the average search time is less than 1 s for a database of 500 fingerprints.

• Power supply: DC 3.8–7.0 V
• Operating current: 65 mA (typical)
• Interface: UART (TTL logic level)
• Baud rate: 9600 × N bps, N=1–12, default 57600 bps
• Storage capacity: 1,000 fingerprints
• Image capture time: <1 s
• Search time: <1 s on average for a database of 500 fingerprints
• Matching modes: 1:1 comparison and 1:N search
• Feature file size: 256 bytes
• Template file size: 512 bytes
• False acceptance rate (FAR): <0.001%
• False rejection rate (FRR): <1.0%
• Security level: 5 (maximum)
• Operating temperature: -20 to +60 °C
• Operating humidity: 40–85%
• Storage temperature: -40 to +85 °C
• Storage humidity: <85%
• Touch surface dimensions: 14.5 × 19.4 mm
• Dimensions: 54 × 20 × 20.5 mm
• Package contents: Fingerprint sensor ×1