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We recently released an interfacing library in .NET for the Fingerprint Scanner (GT-521Fxx). The library is completely open source under MIT license.
Is it possible to change the TX and RX pins on the Arduino? My Arduino has seen better days and its pin 4 is broken.
Yes, it is possible. There should be a note in the section called Software Serial w/ Other Microcontrollers. Not all the pins can support change interrupts for a serial Rx pin depending on what Arduino microcontroller is used. However, there are a few other options. It links to the Arduino.cc Software Serial Library.
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