Simple test¶
Ensure your device works with this simple test.
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import board
import busio
from digitalio import DigitalInOut, Direction
import adafruit_fingerprint
led = DigitalInOut(board.D13)
led.direction = Direction.OUTPUT
uart = busio.UART(board.TX, board.RX, baudrate=57600)
finger = adafruit_fingerprint.Adafruit_Fingerprint(uart)
##################################################
def get_fingerprint():
"""Get a finger print image, template it, and see if it matches!"""
print("Waiting for image...")
while finger.get_image() != adafruit_fingerprint.OK:
pass
print("Templating...")
if finger.image_2_tz(1) != adafruit_fingerprint.OK:
return False
print("Searching...")
if finger.finger_fast_search() != adafruit_fingerprint.OK:
return False
return True
# pylint: disable=too-many-branches
def get_fingerprint_detail():
"""Get a finger print image, template it, and see if it matches!
This time, print out each error instead of just returning on failure"""
print("Getting image...", end="")
i = finger.get_image()
if i == adafruit_fingerprint.OK:
print("Image taken")
else:
if i == adafruit_fingerprint.NOFINGER:
print("No finger detected")
elif i == adafruit_fingerprint.IMAGEFAIL:
print("Imaging error")
else:
print("Other error")
return False
print("Templating...", end="")
i = finger.image_2_tz(1)
if i == adafruit_fingerprint.OK:
print("Templated")
else:
if i == adafruit_fingerprint.IMAGEMESS:
print("Image too messy")
elif i == adafruit_fingerprint.FEATUREFAIL:
print("Could not identify features")
elif i == adafruit_fingerprint.INVALIDIMAGE:
print("Image invalid")
else:
print("Other error")
return False
print("Searching...", end="")
i = finger.finger_fast_search()
if i == adafruit_fingerprint.OK:
print("Found fingerprint!")
return True
else:
if i == adafruit_fingerprint.NOTFOUND:
print("No match found")
else:
print("Other error")
return False
# pylint: disable=too-many-statements
def enroll_finger(location):
"""Take a 2 finger images and template it, then store in 'location'"""
for fingerimg in range(1, 3):
if fingerimg == 1:
print("Place finger on sensor...", end="")
else:
print("Place same finger again...", end="")
while True:
i = finger.get_image()
if i == adafruit_fingerprint.OK:
print("Image taken")
break
elif i == adafruit_fingerprint.NOFINGER:
print(".", end="")
elif i == adafruit_fingerprint.IMAGEFAIL:
print("Imaging error")
return False
else:
print("Other error")
return False
print("Templating...", end="")
i = finger.image_2_tz(fingerimg)
if i == adafruit_fingerprint.OK:
print("Templated")
else:
if i == adafruit_fingerprint.IMAGEMESS:
print("Image too messy")
elif i == adafruit_fingerprint.FEATUREFAIL:
print("Could not identify features")
elif i == adafruit_fingerprint.INVALIDIMAGE:
print("Image invalid")
else:
print("Other error")
return False
if fingerimg == 1:
print("Remove finger")
time.sleep(1)
while i != adafruit_fingerprint.NOFINGER:
i = finger.get_image()
print("Creating model...", end="")
i = finger.create_model()
if i == adafruit_fingerprint.OK:
print("Created")
else:
if i == adafruit_fingerprint.ENROLLMISMATCH:
print("Prints did not match")
else:
print("Other error")
return False
print("Storing model #%d..." % location, end="")
i = finger.store_model(location)
if i == adafruit_fingerprint.OK:
print("Stored")
else:
if i == adafruit_fingerprint.BADLOCATION:
print("Bad storage location")
elif i == adafruit_fingerprint.FLASHERR:
print("Flash storage error")
else:
print("Other error")
return False
return True
##################################################
def get_num():
"""Use input() to get a valid number from 1 to 127. Retry till success!"""
i = 0
while (i > 127) or (i < 1):
try:
i = int(input("Enter ID # from 1-127: "))
except ValueError:
pass
return i
while True:
print("----------------")
if finger.read_templates() != adafruit_fingerprint.OK:
raise RuntimeError('Failed to read templates')
print("Fingerprint templates:", finger.templates)
print("e) enroll print")
print("f) find print")
print("d) delete print")
print("----------------")
c = input("> ")
if c == 'e':
enroll_finger(get_num())
if c == 'f':
if get_fingerprint():
print("Detected #", finger.finger_id, "with confidence", finger.confidence)
else:
print("Finger not found")
if c == 'd':
if finger.delete_model(get_num()) == adafruit_fingerprint.OK:
print("Deleted!")
else:
print("Failed to delete")
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