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Can I use CLUE with the fingerprint sensor?
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Can I use CLUE with the fingerprint sensor?

by dkanday on Mon Jun 14, 2021 10:50 am

I am thinking of using the CLUE with the adafruit fingerprint sensor: https://learn.adafruit.com/adafruit-opt ... r/overview.
Wanted to know if that is possible and also I see that the fingerprint sensor needs the UART pins but those pins are missing on the CLUE. Iam trying to avoid using an audrino or a raspberry pi.
Also in the example, it says that I need to add the follwoing section :
# If using with a computer such as Linux/RaspberryPi, Mac, Windows with USB/serial converter:
# import serial
# uart = serial.Serial("/dev/ttyUSB0", baudrate=57600, timeout=1)

I tried installing the serial library from the audrino website, but the clue keeps looking for the serial library in the lib folder and I am not able to find serial library for the clue.
Any help would be greatly apprecaited.

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Mon Jun 14, 2021 11:12 am

According to the Pinout the pinouts - the RX/TX are on the #0/#1 pads https://learn.adafruit.com/adafruit-clue/pinouts
You should be able to connect the fingerprint sensor to those.
Then use the Circuitptyhon example https://learn.adafruit.com/adafruit-optical-fingerprint-sensor/circuitpython#example-code-3044769-20 its does not use "serial"
It uses busio.UART

Note: I have not tried this myself and I don't represent Adafruit. Just trying to help.

jerryn
 
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Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Mon Jun 14, 2021 11:57 am

FYI - I hooked up one of the R503 Fingeprint sensors to my CLUE as above and it worked. I did have to make one change to the code.
CircuitPython does not accept the "flush=True" argument to the Print commands so I had to remove them all.

Otherwise it worked normally.

here is the modified fingerprint_simpletest.py that I used
Code: Select all | TOGGLE FULL SIZE
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import time
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)

# If using with a computer such as Linux/RaspberryPi, Mac, Windows with USB/serial converter:
# import serial
# uart = serial.Serial("/dev/ttyUSB0", baudrate=57600, timeout=1)

# If using with Linux/Raspberry Pi and hardware UART:
# import serial
# uart = serial.Serial("/dev/ttyS0", baudrate=57600, timeout=1)

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_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()
    # pylint: disable=no-else-return
    # This block needs to be refactored when it can be tested.
    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
            if 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")

jerryn
 
Posts: 1543
Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Mon Jun 14, 2021 1:40 pm

An update on the "flush" argument. It turns out that it is a bug in CircuitPython. See this issue for progress on fixing it https://github.com/adafruit/circuitpython/issues/4888.
For now , you can just remove the "flush" arguments as I noted.

jerryn
 
Posts: 1543
Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Wed Jun 16, 2021 4:58 pm

Thanks Jerryn

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Thu Jun 17, 2021 4:54 pm

Hi Jerryn,
I am trying to use the R503 fingerprint sensor with the clue(modified audrino code). The way I am implementing the code is when I press the left button or button A, I enroll the user and when pressing the button B, I search for the fingerprint.
The issue I am facing is when I store a fingerprint, it says stored successfully and when I tried to read back the same fingerprint it says unknown fingerprint.
The reason I have modified is to remove unwanted data and also I removed the ID# as I cannot input an ID into it.(attached is the code for reference)

But when I run the default example code on the UNO, it stores the data correctly.
Questions:
1. Can removing the ID cause an issue? if not what can cause this error.
2. Also can I have a built in counter where it remembers the last known ID which the finger print got associated to and when I enroll it, the ID increments by itself?

Any help is greatly appreciated.
Attachments
v7_06172021.ino
(21.99 KiB) Downloaded 5 times

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Fri Jun 18, 2021 6:18 am

There is a lot going on in your example and it is hard for me to follow it clearly especially with ll the commented code.

Also, I have not used the Arduino Library so I am not familiar with it. I have been working under CircuitPython.

However, if you comment out the finger.storemode call as you have

Code: Select all | TOGGLE FULL SIZE
 // p = finger.storeModel(id); // D v6 commenting this line


it is not clear that you are actually storing the fingerprint in the reader.

I would suggest trying to simplify the example to debug the fingerprint sensor operation.

It is good to know that the library examples work OK.

jerryn
 
Posts: 1543
Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Fri Jun 18, 2021 11:18 am

Hi Jerryn,

enabling the section mentioned in the code and modifying made it work. Thanks for the suggestion :)

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Fri Jun 18, 2021 12:39 pm

Great! Glad it is working.
Good luck with your project!

jerryn
 
Posts: 1543
Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Fri Jun 25, 2021 10:10 am

Hi jerryn,
Were you able to turn on and off the LEDs on the sensor? I am having trouble understanding how to do that.

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by jerryn on Fri Jun 25, 2021 12:13 pm

I have not used the Arduino Library -- I have only used the R503 with Circuitpython. The LED works with Circuitpython.
With Arduino, I think you use the LEDcontrol function https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library/blob/master/Adafruit_Fingerprint.cpp#L339
Have you tried this example? I am not sure if it is for the R503 https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library/blob/master/examples/ledcontrol/ledcontrol.ino

jerryn
 
Posts: 1543
Joined: Sat Sep 14, 2013 9:05 am

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Fri Jun 25, 2021 5:10 pm

Thanks.. let me try that out.

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Re: Can I use CLUE with the fingerprint sensor?

by dkanday on Mon Jun 28, 2021 11:42 am

Thanks Jerryn,

That example worked for me.

dkanday
 
Posts: 53
Joined: Mon Jun 07, 2021 4:49 pm

Please be positive and constructive with your questions and comments.