Fingerprint reader - TTL GT-521F32 - 200 fingerprint memory - SparkFun SEN-14518

Index: SPF-11249 EAN: 5904422352202

Module with the fingerprint reader, communicating through a serial UART interface (RX, TX). It has a memory, in which it can store up to 1000 fingerprints of different people and export to a computer or other device. 

Fingerprint reader - TTL GT-521F32 - 200 fingerprint memory - SparkFun SEN-14518
€47.46 tax excl.
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Manufacturer: SparkFun
Compatibility: Arduino Raspberry Pi


Module with the fingerprint reader with a 32-bit microcontroller ARM Cortex M3, that communicate through simple commands sent through the serial interface (RX, TX). The sensor has a memory allowing you to record up to 200 fingerprints and transmission of data in the form of photos or base of templates to your computer via USB-UART, microcontroller or other reader.


Module installation are facilitated by the four holes with a diameter of 2.5 mm. The JST - SH connector is used to connect the signals. The system has four pins:

  • VCC - supply voltage of 5 V
  • GND - ground of the system
  • RX - UART serial interface, receiver - it operates with a voltage of 3.3 V
  • TX - UART serial interface, transmitter - it works with a voltage of 3.3 V


With the first run, you need to scan a fingerprint which should be stored in the database, after sending the appropriate command via the serial interface.


The module works with microcontrollers equipped with a serial interface (lines RX, TX), including Arduino and minicomputer Raspberry Pi.


The product is compatible with Arduino

The manufacturer has prepared an application for Windows, as well as a code example along with a library for Arduino which is available on GitHub.



The video made by SparkFun that shows capabilities of the product.



  • Supply voltage: 3.3 V - 6 V
  • Current consumption: up to 130 mA
  • Simple serial interface UART - 9600 bps
  • Resolution of 450 dpi (202 x 258 px)
  • Recognition: 360 °
  • Ability to send fingerprint images to the computer or microcontroller
  • The ability to record a fingerprint into a database
  • Four mounting holes with a diameter of approx. 2.5 mm
  • Module dimensions: 37 x 21 mm



Same-day shipping

  • Crediting the payment for the order on our account on a business day before 10:00 AM means sending the goods on the same day.
  • All packages are being delivered by GLS Group courier and covered with insurance up to 1200 EUR.
  • You will receive a link to track your package and monitor the progress of delivery as soon as it is shipped.

Terms of delivery 

GLS - zone 1

Austria, Belgium, Croatia, The Czech Republic, Denmark, Germany, Netherlands, Poland, Slovakia 

  • Delivery time: 2-4 days
  • Delivery cost: from 4.18 EUR
  • Insurance: 1200 EUR
GLS - zone 2

Bulgaria, Estonia, France, Hungary, Italy, Latvia, Lithuania, Luxembourg, Portugal, Romania, San Marino, Slovenia

  • Delivery time: 2-5 days
  • Delivery cost: from 5.35 EUR
  • Insurance: 1200 EUR
GLS - zone 3

Finland, Greece, Ireland, Spain, Sweden 

  • Delivery time: 2-7 days
  • Delivery cost: from 7.67 EUR
  • Insurance: 1200 EUR

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