Fingerprint Sensor Questions

[noonetoseehere]

Hello,

I am building a museum installation that allows users to scan their fingerprint and inspect it. We only want to use the scanner to capture a fingerprint. We are not concerned with authentication or templates. Is it possible to use the scanner only for capturing images of fingerprints?

One last thing... I am building this as a native OSX app using Obj-C. So, if anyone has any insights about how to make this happen, please feel free to share!

Thank you,
~Jeremy

[adafruit_support_rick]

The user manual for the fingerprint sensor outlines the steps for downloading a fingerprint image. It's not the best documentation, so it takes a little study. If I recall correctly, after you scan the finger, you transfer the image to one of the "character buffers", and download it from there. You'll need a USB-serial adapter to cmmunicate between the Mac and the fingerprint scanner:

https://www.adafruit.com/product/954

That cable will also power the scanner.

My opinions on Objective-C are best kept to myself, as this is a family forum. ;-). Are you sure you don't want to use Swift? Personally, I use Xamarin and C# for Mac programming.

[pixlux]

hi!! i'm very lost

i'm using fingerprint sensor 751 on my arduino adk (IDE1.6.1)
the SFG works very well but with the enroll sketch it said that there was a conflict return type

i visited a lot of forum to find out the solution but...
the wiring is good (pin 12 and 13)
please help

[adafruit_support_rick]

Can you post the exact error messages you're getting? You can copy and paste from the IDE log.

[pixlux]

In file included from C:\Users\pc4less615\Documents\Arduino\libraries\boubess/Adafruit_Fingerprint.h:19:0,
from enroll.ino:17:
C:\Users\pc4less615\Documents\Arduino\libraries\SoftwareSerial/SoftwareSerial.h:95:16: error: conflicting return type specified for 'virtual void SoftwareSerial::write(uint8_t)'
virtual void write(uint8_t byte);
^
In file included from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Stream.h:26:0,
from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/HardwareSerial.h:29,
from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:223,
from C:\Users\pc4less615\Documents\Arduino\libraries\boubess/Adafruit_Fingerprint.h:18,
from enroll.ino:17:
C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:48:20: error: overriding 'virtual size_t Print::write(uint8_t)'
virtual size_t write(uint8_t) = 0;
^
Error compiling.

[adafruit_support_rick]

I think your Arduino IDE is corrupted. Delete it and download a fresh copy.

[pixlux]

ok i'll try

[pixlux]

hi!! me again

i downloaded a new IDE it's now verifying the program with no errors but it cannot detect my mega adk

any advices

thx

[adafruit_support_rick]

Try a different USB cable and a different USB port on your computer.

What is the exact error you're getting?

[pixlux]

hi!! i hadn't installed the driver. now it is done.

but i cant compile on the board.

my problem is that now the SFG mode does not work. it says device can be open ....

[pixlux]

it works!! thx you very much

i did changes in the port number
i set baudrate to 9600 in control panel
hope it will help

[adafruit_support_rick]

Okay! Good luck!

[burcinpak]

Hi,
I can enroll fingerprints for adults easily. But for kids it does not recognize any finger. Does finger size(width etc) matter for these devices?

[adafruit_support_rick]

The features on kid's fingerprints are kind of fine compared to adult fingers. It may not have the resolution needed for kid fingers. You're the first person I've heard of who is trying it with kids, so I don't know for sure. But it sounds that way.

[pixlux]

hi!!
i now want to control my fingerprint with an android phone.
i'm using USBSerialLibrary with my mega adk over USB
my problem is that when i try to compare a data received from android to excecute a command it does not work.
i think i'm not doing it well.
if (Serial.available()){
char cmd= Serial.read();
if (cmd=='1')
detection();
else if (cmd=='2')
search();
else if (cmd=='3')
enroll();
help please