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Added another example based on the default one
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‎examples/fingerprint_simpletest_rpi.py

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import time
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import board
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import busio
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from digitalio import DigitalInOut, Direction
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import adafruit_fingerprint
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led = DigitalInOut(board.D13)
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led.direction = Direction.OUTPUT
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#uart = busio.UART(board.TX, board.RX, baudrate=57600)
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# If using with a computer such as Linux/RaspberryPi, Mac, Windows with USB/serial converter:
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#import serial
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#uart = serial.Serial("/dev/ttyUSB0", baudrate=57600, timeout=1)
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# If using with Linux/Raspberry Pi and hardware UART:
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#import serial
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#uart = serial.Serial("/dev/ttyS0", baudrate=57600, timeout=1)
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# If using with Linux/Raspberry Pi 3 with pi3-disable-bt
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import serial
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uart = serial.Serial("/dev/ttyAMA0", baudrate=57600, timeout=1)
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finger = adafruit_fingerprint.Adafruit_Fingerprint(uart)
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##################################################
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def get_fingerprint():
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"""Get a finger print image, template it, and see if it matches!"""
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print("Waiting for image...")
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while finger.get_image() != adafruit_fingerprint.OK:
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pass
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print("Templating...")
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if finger.image_2_tz(1) != adafruit_fingerprint.OK:
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return False
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print("Searching...")
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if finger.finger_fast_search() != adafruit_fingerprint.OK:
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return False
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return True
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# pylint: disable=too-many-branches
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def get_fingerprint_detail():
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"""Get a finger print image, template it, and see if it matches!
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This time, print out each error instead of just returning on failure"""
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print("Getting image...", end="", flush=True)
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i = finger.get_image()
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if i == adafruit_fingerprint.OK:
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print("Image taken")
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else:
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if i == adafruit_fingerprint.NOFINGER:
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print("No finger detected")
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elif i == adafruit_fingerprint.IMAGEFAIL:
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print("Imaging error")
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else:
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print("Other error")
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return False
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print("Templating...", end="", flush=True)
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i = finger.image_2_tz(1)
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if i == adafruit_fingerprint.OK:
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print("Templated")
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else:
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if i == adafruit_fingerprint.IMAGEMESS:
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print("Image too messy")
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elif i == adafruit_fingerprint.FEATUREFAIL:
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print("Could not identify features")
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elif i == adafruit_fingerprint.INVALIDIMAGE:
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print("Image invalid")
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else:
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print("Other error")
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return False
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print("Searching...", end="", flush=True)
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i = finger.finger_fast_search()
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# pylint: disable=no-else-return
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# This block needs to be refactored when it can be tested.
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if i == adafruit_fingerprint.OK:
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print("Found fingerprint!")
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return True
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else:
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if i == adafruit_fingerprint.NOTFOUND:
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print("No match found")
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else:
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print("Other error")
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return False
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# pylint: disable=too-many-statements
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def enroll_finger(location):
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"""Take a 2 finger images and template it, then store in 'location'"""
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for fingerimg in range(1, 3):
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if fingerimg == 1:
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print("Place finger on sensor...", end="", flush=True)
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else:
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print("Place same finger again...", end="", flush=True)
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while True:
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i = finger.get_image()
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if i == adafruit_fingerprint.OK:
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print("Image taken")
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break
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elif i == adafruit_fingerprint.NOFINGER:
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print(".", end="", flush=True)
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elif i == adafruit_fingerprint.IMAGEFAIL:
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print("Imaging error")
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return False
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else:
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print("Other error")
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return False
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print("Templating...", end="", flush=True)
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i = finger.image_2_tz(fingerimg)
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if i == adafruit_fingerprint.OK:
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print("Templated")
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else:
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if i == adafruit_fingerprint.IMAGEMESS:
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print("Image too messy")
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elif i == adafruit_fingerprint.FEATUREFAIL:
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print("Could not identify features")
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elif i == adafruit_fingerprint.INVALIDIMAGE:
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print("Image invalid")
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else:
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print("Other error")
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return False
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if fingerimg == 1:
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print("Remove finger")
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time.sleep(1)
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while i != adafruit_fingerprint.NOFINGER:
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i = finger.get_image()
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print("Creating model...", end="", flush=True)
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i = finger.create_model()
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if i == adafruit_fingerprint.OK:
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print("Created")
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else:
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if i == adafruit_fingerprint.ENROLLMISMATCH:
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print("Prints did not match")
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else:
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print("Other error")
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return False
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print("Storing model #%d..." % location, end="", flush=True)
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i = finger.store_model(location)
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if i == adafruit_fingerprint.OK:
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print("Stored")
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else:
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if i == adafruit_fingerprint.BADLOCATION:
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print("Bad storage location")
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elif i == adafruit_fingerprint.FLASHERR:
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print("Flash storage error")
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else:
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print("Other error")
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return False
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return True
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##################################################
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def get_num(max_number):
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"""Use input() to get a valid number from 0 to the maximum size
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of the library. Retry till success!"""
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i = -1
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while (i > max_number - 1) or (i < 0):
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try:
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i = int(input("Enter ID # from 0-{}: ".format(max_number - 1)))
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except ValueError:
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pass
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return i
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while True:
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print("----------------")
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if finger.read_templates() != adafruit_fingerprint.OK:
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raise RuntimeError('Failed to read templates')
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print("Fingerprint templates: ", finger.templates)
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if finger.count_templates() != adafruit_fingerprint.OK:
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raise RuntimeError('Failed to read templates')
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print("Number of templates found: ", finger.template_count)
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if finger.read_sysparam() != adafruit_fingerprint.OK:
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raise RuntimeError('Failed to get system parameters')
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print("Size of template library: ", finger.library_size)
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print("e) enroll print")
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print("f) find print")
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print("d) delete print")
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print("r) reset library")
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print("----------------")
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c = input("> ")
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if c == 'e':
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enroll_finger(get_num(finger.library_size))
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if c == 'f':
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if get_fingerprint():
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print("Detected #", finger.finger_id, "with confidence", finger.confidence)
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else:
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print("Finger not found")
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if c == 'd':
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if finger.delete_model(get_num(finger.library_size)) == adafruit_fingerprint.OK:
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print("Deleted!")
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else:
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print("Failed to delete")
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if c == 'r':
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if finger.empty_library() == adafruit_fingerprint.OK:
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print("Library empty!")
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else:
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print("Failed to empty library")

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