Delete From Flash LibraryΒΆ
This sample code shows how to delete a fingerprint template or a segment of templates from flash library.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | # Standard library imports
import sys
# Third party imports
import serial
# Adafruit package imports
from adafruit_fingerprint import AdafruitFingerprint
from adafruit_fingerprint.responses import *
def main():
# Attempt to connect to serial port
try:
port = '/dev/ttyUSB0' # USB TTL converter port
baud_rate = '57600'
serial_port = serial.Serial(port, baud_rate)
except Exception as e:
print(e)
sys.exit()
# Initialize sensor library with serial port connection
finger = AdafruitFingerprint(port=serial_port)
response = finger.vfy_pwd()
if response is not FINGERPRINT_PASSWORD_OK:
print('Did not find fingerprint sensor :(')
sys.exit()
print('Found Fingerprint Sensor!\n')
while True:
print('\nPlease type in the ID # (from 1 to 255) you want to delete...\n')
id = read_number()
print(f'Deleting ID #{id}\n')
if delete(finger=finger, page_id=id, num=1):
print(f'Fingerprint at ID #{id} has been successfully deleted.')
def read_number():
num = 0
while num < 1 or num > 255:
try:
num = int(input())
except ValueError:
print('Please provide an integer')
else:
if num < 1 or num > 255:
print('Please provide an integer in the above range')
return num
def delete(finger, page_id, num):
response = -1
response = finger.delete_char(page_id=page_id, num=num)
if response is FINGERPRINT_OK:
print('Deleted')
sys.stdout.flush()
return page_id
elif response is FINGERPRINT_PACKETRECEIVER:
print('Communication error')
elif response is FINGERPRINT_TEMPLATEDELETEFAIL:
print('Could not delete')
elif response is FINGERPRINT_BADLOCATION:
print('Could not delete in that location')
elif response is FINGERPRINT_FLASHER:
print('Error writing to flash')
else:
print('Unknown Error')
return False
__all__ = ['delete']
if __name__ == '__main__':
main()
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