fingerprint_fps_GT511C3

Troubleshooting
7

Thanks for coming back to this @peekay123!

Indeed, I recompiled my "FPS_IDFinger" sketch after adding some fingerprints with the "Enroll" sketch.
After that, it started to disconnect and blink green.
Even with the original example "FPS_IDFinger" sketch the same happens now...
To be honest I should say also that I changed the connections slightly: Instead of using 3.3V I now use 5V to power the FPS module.

I did not add any specific instructions in that direction.

Suggestion: Shall we focus on testing the standard example, included with your (old) library?

Here it is:

/* 
	FPS_Enroll.ino - Library example for controlling the GT-511C3 Finger Print Scanner (FPS)
	Created by Josh Hawley, July 23rd 2013
	Licensed for non-commercial use, must include this license message
	basically, Feel free to hack away at it, but just give me credit for my work =)
	TLDR; Wil Wheaton's Law

	This sketch will attempt to identify a previously enrolled fingerprint.
	
	Modified for Particle Photon by Paul Kourany (peekay123), Oct 24, 2105
*/

#include "FPS_GT511C3.h"

// Hardware setup - FPS connected to:
//	  digital pin 4(arduino rx, fps tx)
//	  digital pin 5(arduino tx - 560ohm resistor fps tx - 1000ohm resistor - ground)
//		this brings the 5v tx line down to about 3.2v so we dont fry our fps

FPS_GT511C3 fps;

void setup()
{
	Serial.begin(9600);
	delay(100);
	fps.Open();
	fps.SetLED(true);
}

void loop()
{

	// Identify fingerprint test
	if (fps.IsPressFinger())
	{
		fps.CaptureFinger(false);
		int id = fps.Identify1_N();
		if (id <200)
		{
			Serial.print("Verified ID:");
			Serial.println(id);
		}
		else
		{
			Serial.println("Finger not found");
		}
	}
	else
	{
		Serial.println("Please press finger");
	}
	delay(100);
}

Today, I will try to find some time to try out a few more things.

PS:

  1. I found also another similar thread where you helped making this device work: LINK
  2. Here is the 'old' library ported by Paul: LINK