High precision Capacitive Fingerprint Reader (B), UART/USB dual ports

SKU: 20679
Part Number: Capacitive Fingerprint Reader (B)
Brand: Waveshare


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High precision Capacitive Fingerprint Reader (B), UART/USB dual ports
Capacitive Fingerprint Reader (B)

precise fingerprint identification | UART/USB dual ports

Product Features

The Capacitive Fingerprint Reader (B) is a fast and stable capacitive fingerprint module specialized for secondary development, suits integration applications.

By incorporating high performance Cortex core processor, high security commercial fingerprint algorithm, and advanced semiconductor fingerprint sensor, this module is designed as a intelligent integration module with functions including fingerprint enrolling, image processing, template generating and storing, fingerprint matching and searching, etc.

  • Easy to use by some simple commands, you don't have to know any fingerprint technology, or the module inter structure/calculation
  • Commercial fingerprinting algorithm, stable performance, fast identification
  • Sensitive detection, just touch the collecting window lightly, without pressing
  • Allows to freely input/output fingerprint images, fingerprint feature file and other fingerprinting actions
  • Dual communication, UART or USB
  • Comes with rich development resources (related command documents, tools, and examples for Raspberry Pi/Arduino/STM32)
parameter value
Sensor Semiconductor (capacitive)
Module dimension 34 × 28.5mm
Sensor dimension 33.4 × 20.4mm
Image DPI 508
Image resolution 208 × 288
Greyscale 256 (8-bit)
Sensing area 14.6 × 10.6mm
Fingerprint capacity 3000
Security level 1-5 configurable, 3 by default
the higher value, the lower FAR (False Acceptance Rate), yet the higher FRR (False Rejection Rate)
Encryption key 64-bit encryption
Image collecting rate 20fps
Matching time 0.5s
Dynamic current <40mA
Operating voltage 3.3-5V
Communication port UART or USB
ESD SD IEC 61000-4-2 LEVEL 4 positive/negative 15KV air discharge
Baudrate configurable: 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps
115200bps by default
Application examples

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

Outline dimensions
Resources & Services

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

Selection Guide

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
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

Weight: 0.017 kg

Quick Overview

  1. Capacitive Fingerprint Reader (B) x1
  2. PH2.0 5PIN wire x1