Optical Fingerprint
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Re: Optical Fingerprint

by adafruit_support_rick on Sun Mar 24, 2013 5:09 pm

Looks as if you haven't installed the library properly. We have a nice tutorial on Arduino libraries and how to install them.

Have you been following the Fingerprint Tutorial? The library download link is included on this page
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Re: Optical Fingerprint

by pcollins on Mon Mar 25, 2013 5:26 pm

Cheers had the file naming convention a bit mixed used the enrol sketch with the FP sensor hooked up correctly, tested with each baud rate available most of the tine got either nothing or random characters but other times got image attached.
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Re: Optical Fingerprint

by adafruit_support_rick on Mon Mar 25, 2013 6:22 pm

Please post a picture showing the connections to the arduino.
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Re: Optical Fingerprint

by pcollins on Tue Mar 26, 2013 5:22 pm

Folks, Thanks for the help, found that had a bad solder joint on one of the connection, thus why it would not enrol. Still can't enroll with windows to view image, was wondering if there was a way of getting image off the Arduino. Again thanks for the help.
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Re: Optical Fingerprint

by adafruit_support_rick on Wed Mar 27, 2013 9:44 am

You can't dump the image to Arduino because it's too big to fit in the Arduino's memory. The only way to do that would be to have the Arduino pass the image data along to Windows as it is being received. That's essentially what the 'blank sketch' does.

What seems to be the problem with Windows? Are you trying to use the blank sketch? What kind of Arduino are you using?
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Re: Optical Fingerprint

by pcollins on Wed Mar 27, 2013 11:37 am

Using the blank sketch with the SFG demo software but when click open device on SFG and select com port 15 which is what Arduino is hooked up to get the following:

open device fail please check password and device address, is displayed on SFG demo applcation

Have verified again after getting the Enroll sketch working, tried different Baud rates but with same result, was told in some cases that it is very trickey to hook up and may need a couple of attempts, but still the same error.

I am using the blank sketch to bypass the Arduino.. and have the White/Green wires hooked up correctly
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Re: Optical Fingerprint

by adafruit_support_rick on Wed Mar 27, 2013 12:24 pm

What kind of arduino? The blank sketch doesn't work with all of them. It will work with a Uno, but not with a Leonardo, for example.
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Re: Optical Fingerprint

by pcollins on Wed Mar 27, 2013 4:44 pm

I've an R3 UNO, as it seems that the Sensor is working might look into reloading the demo software and see if that helps. another question I have, when the sensor scans the print and verifys a positive match, from the serial port a confidence level is given for example 200, is there a way of incorporating this into the code, so that the confidance level has to be above a certain level before a positive match is returned.
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Re: Optical Fingerprint

by adafruit_support_rick on Wed Mar 27, 2013 5:13 pm

pcollins wrote:is there a way of incorporating this into the code, so that the confidance level has to be above a certain level before a positive match is returned.

What code are you referring to? The fingerprint.pde example sketch? If so, all you have to do is test the confidence level in getFingerprintIDez() and return -1 if it's too low.
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Re: Optical Fingerprint

by pcollins on Thu Mar 28, 2013 10:18 am

thanks so I can just specify the confidence level something like if (p ! < 130) return -1; will try later . Cheers
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