Problem Fingerprint Module not Working

futurehall · October 11, 2017, 7:09am

Hello, i just bought this fingerprint module. I'm using arduino uno and library from adafruit fingerprint and uploaded the example enroll sketch. But my problem is my fingerprint module doesn't detected in program.

The LED blink once just when i plug it on my pc. After that the led's not blink or turn on anymore. I dunno the type of this fingerprint module, but here's pic of the sensor : http://i.ebayimg.com/images/i/191195264746-0-1/s-l1000.jpg

Is my module broken? Or there's something more to make this thing work?

UKHeliBob · October 11, 2017, 8:02am

Can you please provide a link to the device, rather than a picture of it and post a diagram of your circuit (hand drawn is OK) and the program that you are running, using code tags when you post it.

futurehall · October 12, 2017, 4:30am

UKHeliBob:
Can you please provide a link to the device, rather than a picture of it and post a diagram of your circuit (hand drawn is OK) and the program that you are running, using code tags when you post it.

i found the fingerprint i bought in ebay, here the link
here's my wiring diagram

and here's code i used for the test (Adafruit fingerprint enroll example) :

/*************************************************** 
  This is an example sketch for our optical Fingerprint sensor

  Designed specifically to work with the Adafruit BMP085 Breakout 
  ----> http://www.adafruit.com/products/751

  These displays use TTL Serial to communicate, 2 pins are required to 
  interface
  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution
 ****************************************************/

#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>

uint8_t id;

uint8_t getFingerprintEnroll();

// Software serial for when you dont have a hardware serial port
// pin #1 is IN from sensor (GREEN wire)
// pin #0 is OUT from arduino  (WHITE wire)
// On Leonardo/Micro/Yun, use pins 8 & 9. On Mega, just grab a hardware serialport 
SoftwareSerial mySerial(1, 0);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

// On Leonardo/Micro or others with hardware serial, use those! #0 is green wire, #1 is white
//Adafruit_Fingerprint finger = Adafruit_Fingerprint(&Serial1);


void setup()  
{
  while (!Serial);  // For Yun/Leo/Micro/Zero/...
  delay(500);
  
  Serial.begin(9600);
  Serial.println("Adafruit Fingerprint sensor enrollment");

  // set the data rate for the sensor serial port
  finger.begin(57600);
  
  if (finger.verifyPassword()) {
    Serial.println("Found fingerprint sensor!");
  } else {
    Serial.println("Did not find fingerprint sensor :(");
    while (1);
  }
}

uint8_t readnumber(void) {
  uint8_t num = 0;
  boolean validnum = false; 
  while (1) {
    while (! Serial.available());
    char c = Serial.read();
    if (isdigit(c)) {
       num *= 10;
       num += c - '0';
       validnum = true;
    } else if (validnum) {
      return num;
    }
  }
}

void loop()                     // run over and over again
{
  Serial.println("Ready to enroll a fingerprint! Please Type in the ID # you want to save this finger as...");
  id = readnumber();
  Serial.print("Enrolling ID #");
  Serial.println(id);
  
  while (!  getFingerprintEnroll() );
}

uint8_t getFingerprintEnroll() {

  int p = -1;
  Serial.print("Waiting for valid finger to enroll as #"); Serial.println(id);
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image taken");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.println(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("Imaging error");
      break;
    default:
      Serial.println("Unknown error");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(1);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image converted");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("Image too messy");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("Could not find fingerprint features");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("Could not find fingerprint features");
      return p;
    default:
      Serial.println("Unknown error");
      return p;
  }
  
  Serial.println("Remove finger");
  delay(2000);
  p = 0;
  while (p != FINGERPRINT_NOFINGER) {
    p = finger.getImage();
  }
  Serial.print("ID "); Serial.println(id);
  p = -1;
  Serial.println("Place same finger again");
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image taken");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.print(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("Imaging error");
      break;
    default:
      Serial.println("Unknown error");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(2);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image converted");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("Image too messy");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("Could not find fingerprint features");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("Could not find fingerprint features");
      return p;
    default:
      Serial.println("Unknown error");
      return p;
  }
  
  // OK converted!
  Serial.print("Creating model for #");  Serial.println(id);
  
  p = finger.createModel();
  if (p == FINGERPRINT_OK) {
    Serial.println("Prints matched!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_ENROLLMISMATCH) {
    Serial.println("Fingerprints did not match");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }   
  
  Serial.print("ID "); Serial.println(id);
  p = finger.storeModel(id);
  if (p == FINGERPRINT_OK) {
    Serial.println("Stored!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_BADLOCATION) {
    Serial.println("Could not store in that location");
    return p;
  } else if (p == FINGERPRINT_FLASHERR) {
    Serial.println("Error writing to flash");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }   
}

UKHeliBob · October 12, 2017, 6:16am

SoftwareSerial mySerial(1, 0);Why are you using SoftwareSerial on the hardware serial pins ?

futurehall · October 12, 2017, 11:50am

UKHeliBob:
SoftwareSerial mySerial(1, 0);Why are you using SoftwareSerial on the hardware serial pins ?

it's the code from library I downloaded. actually the default code is serial 2 and 3, but I use pin 0 and 1 on my Arduino, so I modify it to 0 & 1.

do I need to delete this code?

UKHeliBob · October 12, 2017, 1:14pm

it's the code from library I downloaded

but

the default code is serial 2 and 3, but I use pin 0 and 1 on my Arduino, so I modify it to 0 & 1.

So it is not actually the code from the library at all.

Why not use pins 2 and 3 for SoftSerial as in the example, leaving hardware serial free to print messages to the serial monitor.

futurehall · October 14, 2017, 2:50am

UKHeliBob:
butSo it is not actually the code from the library at all.

Why not use pins 2 and 3 for SoftSerial as in the example, leaving hardware serial free to print messages to the serial monitor.

I've tried, but nothing change. it keeps just blink once I plug it and not detected in program.

UKHeliBob · October 14, 2017, 6:36am

Please post your latest code and a drawing of your circuit. Draw it by hand and post a photograph.

futurehall · October 17, 2017, 2:16pm

/*************************************************** 
  This is an example sketch for our optical Fingerprint sensor

  Designed specifically to work with the Adafruit BMP085 Breakout 
  ----> http://www.adafruit.com/products/751

  These displays use TTL Serial to communicate, 2 pins are required to 
  interface
  Adafruit invests time and resources providing this open source code, 
  please support Adafruit and open-source hardware by purchasing 
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  
  BSD license, all text above must be included in any redistribution
 ****************************************************/

#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>

uint8_t id;

uint8_t getFingerprintEnroll();

// Software serial for when you dont have a hardware serial port
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino  (WHITE wire)
// On Leonardo/Micro/Yun, use pins 8 & 9. On Mega, just grab a hardware serialport 
SoftwareSerial mySerial(2, 3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

// On Leonardo/Micro or others with hardware serial, use those! #0 is green wire, #1 is white
//Adafruit_Fingerprint finger = Adafruit_Fingerprint(&Serial1);


void setup()  
{
  while (!Serial);  // For Yun/Leo/Micro/Zero/...
  delay(500);
  
  Serial.begin(9600);
  Serial.println("Adafruit Fingerprint sensor enrollment");

  // set the data rate for the sensor serial port
  finger.begin(57600);
  
  if (finger.verifyPassword()) {
    Serial.println("Found fingerprint sensor!");
  } else {
    Serial.println("Did not find fingerprint sensor :(");
    while (1);
  }
}

uint8_t readnumber(void) {
  uint8_t num = 0;
  boolean validnum = false; 
  while (1) {
    while (! Serial.available());
    char c = Serial.read();
    if (isdigit(c)) {
       num *= 10;
       num += c - '0';
       validnum = true;
    } else if (validnum) {
      return num;
    }
  }
}

void loop()                     // run over and over again
{
  Serial.println("Ready to enroll a fingerprint! Please Type in the ID # you want to save this finger as...");
  id = readnumber();
  Serial.print("Enrolling ID #");
  Serial.println(id);
  
  while (!  getFingerprintEnroll() );
}

uint8_t getFingerprintEnroll() {

  int p = -1;
  Serial.print("Waiting for valid finger to enroll as #"); Serial.println(id);
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image taken");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.println(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("Imaging error");
      break;
    default:
      Serial.println("Unknown error");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(1);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image converted");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("Image too messy");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("Could not find fingerprint features");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("Could not find fingerprint features");
      return p;
    default:
      Serial.println("Unknown error");
      return p;
  }
  
  Serial.println("Remove finger");
  delay(2000);
  p = 0;
  while (p != FINGERPRINT_NOFINGER) {
    p = finger.getImage();
  }
  Serial.print("ID "); Serial.println(id);
  p = -1;
  Serial.println("Place same finger again");
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image taken");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.print(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("Imaging error");
      break;
    default:
      Serial.println("Unknown error");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(2);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image converted");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("Image too messy");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("Could not find fingerprint features");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("Could not find fingerprint features");
      return p;
    default:
      Serial.println("Unknown error");
      return p;
  }
  
  // OK converted!
  Serial.print("Creating model for #");  Serial.println(id);
  
  p = finger.createModel();
  if (p == FINGERPRINT_OK) {
    Serial.println("Prints matched!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_ENROLLMISMATCH) {
    Serial.println("Fingerprints did not match");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }   
  
  Serial.print("ID "); Serial.println(id);
  p = finger.storeModel(id);
  if (p == FINGERPRINT_OK) {
    Serial.println("Stored!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_BADLOCATION) {
    Serial.println("Could not store in that location");
    return p;
  } else if (p == FINGERPRINT_FLASHERR) {
    Serial.println("Error writing to flash");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }   
}

wiring diagram : Diagram
Arduino and fingerprint module photo : Arduino + Fingerprint

cerchi5 · November 2, 2017, 10:55am

same problem here..... I don't have answer but I have the datasheet of the sensor I hope it could be useful.

http://kookye.com/download/fingerprint/Fingerprint%20user%20manual.pdf this is from the kookye site and the same one could be found in the osooyo site osoyoo.com/driver/Fingerprint user manual.pdf

ianbuck · April 22, 2018, 8:36pm

I was having the same problem and found changing SoftwareSerial mySerial(2, 3); to SoftwareSerial mySerial(8, 3); works fine now hope this helps

Franky17 · August 18, 2018, 2:10pm

Well It's not a problem with your adafruit code it is because you are using Single stand wire for connection , Use thin Multi stand wires for connecting your wires with arduino. (Cut Male-to-male connector into half and Connect those cut ends with the sensor wires, and the male connection to arduino) [i had same problem recently, i did same and it worked..!]

aleino · September 25, 2018, 12:53pm

Franky17:
Well It's not a problem with your adafruit code it is because you are using Single stand wire for connection , Use thin Multi stand wires for connecting your wires with arduino. (Cut Male-to-male connector into half and Connect those cut ends with the sensor wires, and the male connection to arduino) [i had same problem recently, i did same and it worked..!]

I confirm, I solved reconizing problem with this tip!

krishnajai2309 · February 14, 2019, 8:39am

. I'm using arduino uno and library from adafruit fingerprint and uploaded the example enroll sketch. But my problem is my fingerprint module doesn't detected in program.

The LED blink once just when i plug it on my pc. After that the led's not blink or turn on anymore.here's pic of the sensor : http://i.ebayimg.com/images/i/191195264746-0-1/s-l1000.jpg

UKHeliBob · September 30, 2020, 10:48am

@kishalay

You used Report to moderator saying

I have tried every thing soldered the wires to the uno itself but still it's not detecting in the code the led just blinked and goes off Everytime I connect the board to my laptop

presumably because you could not post to the old locked thread

If you have the same problem as the locked thread and need help please start a new one giving full details

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