Overview

This is a highly integrated rectangle-shaped all-in-one capacitive fingerprint sensor module, which is designed in small form factor. The module is controlled via UART commands, fairly easy to use. It's advantages includes fast verification, high stability, and low power consumption, etc.

Based on a high performance Cortex processor, combined with high-security commercial fingerprinting algorithm, the UART Fingerprint Sensor (R) features functionalities like fingerprint enrolling, image acquisition, feature finding, fingerprint matching, and so on. Without any knowledge about the complicate fingerprinting algorithm, all you need to do is just sending some UART commands, to quickly integrate it into fingerprint verification applications which require small size and high precision.

Features

• Easy to use by some simple commands, you don't have to know any fingerprint technology, or the module inter structure
• Commercial fingerprinting algorithm, stable performance, fast verification, supports fingerprint enrolling, fingerprint matching, collect fingerprint image, and upload fingerprint feature, etc.
• Capacitive sensitive detection, just touch the collecting window lightly for fast verification
• Hardware highly integrated, processor and sensor in one small chip, suit for small size applications
• Embedded human sensor, the processor will enter sleep automatically, and wake up when touching, lower power consumption
• Onboard UART connector, easy to connect with hardware platforms like STM32 and Raspberry Pi

Specifications

• Sensor type: capacitive touching
• Resolution: 508DPI
• Image pixels: 192×192
• Image grey scale: 8
• Sensor size: 11.2mm × 12.2mm
• Module size: 20.2mm × 33.3mm
• Fingerprint capacity: 3000
• Matching time: <0.2s (1:N, and N≤100)
• False acceptance rate: <0.001%
• False rejection rate: <0.1%
• Operating voltage: 2.7~3.3V
• Operating current: <50mA
• Sleep current: <16uA
• Anti-electrostatic: contact discharge 8KV / aerial discharge 15KV
• Interface: UART (TTL level)
• Baudrate: 19200 bps
• Operating environment:
  • Temperature: -20°C~70°C
  • Humidity: 40%RH~85%RH (no condensation)
• Storage environment:
  • Temperature: -40°C~85°C
  • Humidity: <85%RH (no condensation)

Applications

• Fingerprint lock
• Fingerprint safe deposit box
• Access control system
• Clock in and out

Development Resources

Wiki : www.waveshare.com/wiki/UART_Fingerprint_Sensor_(R)

Recommended Items

We recommend this USB to UART Module for easy testing: FT232 USB UART Board (micro)

Selection Guide

Product	Optical	Capacitive
	A	A	B	C	D	E	R
Pros	Durable, excellent anti-electrostatic			Small form factor, low power consumption
		High precision, good detection/verification		Small collecting area, high precision, good detection/verification		High precision, good detection/verification
Cons	Large dimension, low precision, interfered by lighting	High environmental requirement (temperature, humidity, dust, alkaline air)
Features	Separated structure			Round-shaped, all-in-one		Rectangle-shaped, all-in-one
Fingerprint capacity	4000	3000		500	150	3000
Image pixels	248*296	192*192	208*288	192*192	160*160		192*192
Interface	UART	UART, USB		UART
False acceptance rate	<0.001%	0.0001%	<0.001%	<0.001%
False rejection rate	<0.1%	0.01%	0.1%	<0.1%
Sensor life time	10 years	about 200K times	about 5M times	about 1M times
Use condition	More sensitive for wet fingers	More sensitive for dry fingers
Applicable products	Used frequently, like access control system	Require high precision, like fingerprinting lock
	Generally, optical modules are used in low-end products, while capacitive module are suitable for high-end products