Jako0815 commented 4 years ago

Hello, I have problems with the R503 Sensor, when i tried to enroll a new finger, the script always says that the 2 fingers do not match. I chanced a few lines of code and it worked fine for me. And I like to share my script, if you have the same problems. Here is it:

!/usr/bin/env python

-- coding: utf-8 --

@author: Bastian Raschke bastian.raschke@posteo.de """ import hashlib import time from pyfingerprint.pyfingerprint import PyFingerprint

print('Fingerprint Script')

Enrolls new finger

Tries to initialize the sensor

try: f = PyFingerprint('/dev/ttyUSB0', 57600, 0xFFFFFFFF, 0x00000000)

if ( f.verifyPassword() == False ):
    raise ValueError('The given fingerprint sensor password is wrong!')

except Exception as e: print('The fingerprint sensor could not be initialized!') print('Exception message: ' + str(e)) exit(1)

Gets some sensor information

print('Currently stored templates: ' + str(f.getTemplateCount()))

Tries to enroll new finger

try: print('Waiting for finger...')

## Wait that finger is read
while ( f.readImage() == False ):
    pass

## Converts read image to characteristics and stores it in charbuffer 1
f.convertImage(0x01)
f.createTemplate()

## Checks if finger is already enrolled
result = f.searchTemplate()
positionNumber = result[0]

if ( positionNumber >= 0 ):
    print('Template already exists at position #' + str(positionNumber))
    exit(0)

print('Remove finger...')
time.sleep(2)

print('Waiting for same finger again...')

## Wait that finger is read again
while ( f.readImage() == False ):
    pass

## Converts read image to characteristics and stores it in charbuffer 2
f.convertImage(0x02)
f.createTemplate()

if ( f.compareCharacteristics() == 0 ):
  print(str(f.compareCharacteristics()))
  print('Fingers do not match')
  exit(0)

## Compares the charbuffers and creates a template
f.createTemplate()

## Gets new position number (the counting starts at 0, so we do not need to increment)
positionNumber = f.getTemplateCount()

## Saves template at new position number
if ( f.storeTemplate(positionNumber) == False ):
    print('Finger enrolled successfully!')
    print('New template position #' + str(positionNumber))
print('Waiting for finger...')

except Exception as e: print('Operation failed!') print('Exception message: ' + str(e)) exit(1)

chrisb2 commented 4 years ago

This also worked for me with the R503 sensor. Replicated above program here in readable format with a comment on the 2 lines added:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
PyFingerprint
Copyright (C) 2015 Bastian Raschke <bastian.raschke@posteo.de>
All rights reserved.
"""

import time
from pyfingerprint.pyfingerprint import PyFingerprint

## Enrolls new finger
##

## Tries to initialize the sensor
try:
    f = PyFingerprint('/dev/ttyUSB0', 57600, 0xFFFFFFFF, 0x00000000)

    if ( f.verifyPassword() == False ):
        raise ValueError('The given fingerprint sensor password is wrong!')

except Exception as e:
    print('The fingerprint sensor could not be initialized!')
    print('Exception message: ' + str(e))
    exit(1)

## Gets some sensor information
print('Currently used templates: ' + str(f.getTemplateCount()) +'/'+ str(f.getStorageCapacity()))

## Tries to enroll new finger
try:
    print('Waiting for finger...')

    ## Wait that finger is read
    while ( f.readImage() == False ):
        pass

    ## Converts read image to characteristics and stores it in charbuffer 1
    f.convertImage(0x01)
    f.createTemplate()  # Line added for fix

    ## Checks if finger is already enrolled
    result = f.searchTemplate()
    positionNumber = result[0]

    if ( positionNumber >= 0 ):
        print('Template already exists at position #' + str(positionNumber))
        exit(0)

    print('Remove finger...')
    time.sleep(2)

    print('Waiting for same finger again...')

    ## Wait that finger is read again
    while ( f.readImage() == False ):
        pass

    ## Converts read image to characteristics and stores it in charbuffer 2
    f.convertImage(0x02)
    f.createTemplate()  # Line added for fix

    ## Compares the charbuffers
    if ( f.compareCharacteristics() == 0 ):
        raise Exception('Fingers do not match')

    ## Creates a template
    f.createTemplate()

    ## Saves template at new position number
    positionNumber = f.storeTemplate()
    print('Finger enrolled successfully!')
    print('New template position #' + str(positionNumber))

except Exception as e:
    print('Operation failed!')
    print('Exception message: ' + str(e))
    exit(1)

chrisb2 commented 4 years ago

I have been experimenting with this and believe a better solution is to use "create template" instead of "compare characteristics", this is based on the data sheet which says for "create template":

To combine information of character files from CharBuffer1 and CharBuffer2 and generate a template which is stored back in both CharBuffer1 and CharBuffer2.

and:

Confirmation code=0aH: fail to combine the character files. That’s, the character files don’t belong to one finger.

So your program would become:

## Tries to enroll new finger
try:
    print('Waiting for finger...')

    ## Wait that finger is read
    while ( f.readImage() == False ):
        pass

    ## Converts read image to characteristics and stores it in charbuffer 1
    f.convertImage(0x01)

    ## Checks if finger is already enrolled
    result = f.searchTemplate()
    positionNumber = result[0]

    if ( positionNumber >= 0 ):
        print('Template already exists at position #' + str(positionNumber))
        exit(0)

    print('Remove finger...')
    time.sleep(2)

    print('Waiting for same finger again...')

    ## Wait that finger is read again
    while ( f.readImage() == False ):
        pass

    ## Converts read image to characteristics and stores it in charbuffer 2
    f.convertImage(0x02)

    ## Compares the charbuffers and creates template if they are the same finger
    if ( not f.createTemplate() ):
        raise Exception('Fingers do not match')

    ## Saves template at new position number
    positionNumber = f.storeTemplate()
    print('Finger enrolled successfully!')
    print('New template position #' + str(positionNumber))

bastianraschke / pyfingerprint