Need help connecting Fingerprint Scanner - TTL (GT-511C3) over UART Serial Comms

Just learnt that the GT511C3 uses the SmackFinger 3.0 Algorithm for identification.
Does that help in replicating the algorithm for identification/verification?

@PaddeK any other info on the GT-521F52 shared database on a network?

I did not find anything about that in the datasheets. But it acts as an usb drive so there are sure ways to do this. I ordered one because i am very interested in the touch wake up feature.

About the algorithm.. i dont think this will help. The matching of a fingerprint is not like simple string matching. You cant just let the fingerprint generate a template and then search for a match in a database. There is all kinds of magic and fairy dust involved :)

My GT-521F52 arrived today.. i hope i can find some time this weekend to test it.

can I know which are the 12 bytes you send to sensor for EnrollStart() and also for Enrollchecked().

Can You please help by giving me answer of which are the commands goes to sensor for 12 bytes to startEnroll() and CheckedEnroll

int i = 0;

            byte[] Parameter = new byte[4];
            Parameter[0] = (byte)(i & 0x000000ff);
            Parameter[1] = (byte)((i & 0x0000ff00) >> 8);
            Parameter[2] = (byte)((i & 0x00ff0000) >> 16);
            Parameter[3] = (byte)((i & 0xff000000) >> 24);

            // SetSpeed = new byte[] { 0x55, 0xAA, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x12, 0x00, 0x13, 0x01 };
           //  Writer();

            SetSpeed = new byte[] { 0x55, 0xAA, 0x01, 0x00, Parameter[0], Parameter[1], Parameter[2], Parameter[3], 0x21, 0x00, 0x22, 0x01 };//checkenrolled
            Writer();

            SetSpeed = new byte[] { 0x55, 0xAA, 0x01, 0x00, Parameter[0], Parameter[1], Parameter[2], Parameter[3], 0x22, 0x00, 0x23, 0x01 };//enrollStart
            Writer();

can you please send command of 12 bytes for enrollstart and enrollechecked

It looks like you're posting C code, not JS. Did you want this converted to run on Espruino, or are you actually using an Arduino? If so, you'd need to find an Arduino forum to post on.

I am using C# code and I want to start enroll part of FPS_GT511C1R using C# language.

Can u please help

I'm afraid we can't help - this is a forum for Espruino, which is JavaScript. I'd suggest that you contact the company you purchased it from. For instance Sparkfun sells those sensors and has a forum.