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Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART
Capacitive Fingerprint Sensor - UART

Capacitive Fingerprint Sensor - UART

SKU: 16606

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This is a highly integrated round-shaped all-in-one capacitive fingerprint sensor module, which is nearly as small as a nail plate. The module is controlled via UART commands, fairly easy to use. It's advantages includes 360° omni-directional verification, 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 (C) features functionalities like fingerprint enrolling, image acquisition, feature finding, template generating and storing, 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.


  • 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
  • Narrow stainless steel rim, large touching area, supports 360° omni-directional verification
  • 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


  • Sensor type: capacitive touching
  • Resolution: 508DPI
  • Image pixels: 192×192
  • Image grey scale: 8
  • Sensor size: R15.5mm
  • Fingerprint capacity: 500
  • Matching time: <500ms (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
  • 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)


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

Development Resources

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

Recommended Items

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

Selection Guide

Product UART Fingerprint Reader Capacitive Fingerprint Reader UART Fingerprint Sensor (C) UART Fingerprint Sensor (R)
Type Optical fingerprinting module Capacitive fingerprinting module
Pros Low cost, durable, excellent anti-electrostatic Small collecting area, high precision, good at detection and verification
  Small form factor, low power consumption
Cons Large dimension, low precision, interfered by lighting High environmental requirement (temperature, humidity, dust, alkaline air)
Features Rectangle-shaped, separated structure Round-shaped, all-in-one Rectangle-shaped, all-in-one
Fingerprint capacity 4000 500 3000
Image pixels 248×296 192×256 192×192
False acceptance rate <0.001% 0.0001% <0.001%
False rejection rate <0.1%  0.01% <0.1% 
Sensor life time 10 years 3-5 years (about 100,000 times on normal condition) about 1,000,000 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 suit for high-end products

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