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Topic: Fingerprint scanner + arduino pro mini (Read 42 times) previous topic - next topic


Jul 05, 2015, 03:26 pm Last Edit: Jul 05, 2015, 03:28 pm by Raph3145
Hi everybody,

I am having an issue with my FPS (https://www.sparkfun.com/products/13007) : I can't control it with my Arduino Pro Mini 3.3V.

I connected directly to the computer (through FTDI) to use the SDK Demo, it worked fine, but back on the Arduino, nothing at all except that on the serial monitor:
"FPS - Open
FPS - SEND: "55 AA 01 00 00 00 00 00 01 00 01 01"

Here is what I have tried so far:
- switch TX/RX (because from a website to another they are not the same..)
- input voltage 3.3V, 3.7V, 5V
- with / without resistors
- change baudrate ( 9600 / 115200)

and my code:

#include "FPS_GT511C1R.h"
#include "SoftwareSerial.h"

FPS_GT511C1R fps(1, 0);

void setup()
fps.UseSerialDebug = true; // so you can see the messages in the serial debug screen

void loop()
// FPS Blink LED Test
fps.SetLED(true); // turn on the LED inside the fps
fps.SetLED(false);// turn off the LED inside the fps

Any help please ?


I'm not sure, but first try deleting the spaces between fps. and open();. Then, try changing FPS_GT511C1R fps(1, 0); to FPS_GT511C1R fps(4, 5);. That is how it is on the original code. Or, if you can't do that, change it to FPS_GT511C1R fps(Non-PWM pin, PWM pin); no matter what


Hi and thanks for the reply,

I tried that...but still nothing the LED is off...

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