ZFM-20 fingerprint capture library is an open source shared library project and it's source code and compiled binaries are available at. Generally, this library is designed to work with any USB to serial converter which including FT232, CP2101, etc. This version of ZFM-20 Fingerprint capture library is tested with ZFM-20 series serial fingerprint module with CH340G USB to serial converter. net framework support languages and for FPC. Object-oriented wrappers for this library are available for both. This library is developed to use with most of the programming languages which including C, C++, Delphi, FPC, Microsoft. ZFM20-LIB is x86 native shared library and it's implemented using Lazarus/ FPC. ZFM-20 fingerprint sensor test setup with CH340G serial to USB converter. The main purpose of this library is to use ZFM-20 sensor with PC as a low-cost fingerprint capture unit and because of that, in-module fingerprint processing and verification functions are not implemented in this library. This ZFM-20 fingerprint library is developed to capture and retrieve fingerprint images from the above sensor module. Other than capturing fingerprints this module has inbuilt DSP to process and verify captured fingerprints. Resolution of these fingerprint modules are 256×288 pixels and depending on the module it can be accessible over UART or USB interfaces. ZFM-20 is an optical fingerprint sensor module series developed by Zhiantec.
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