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You are here: Home / Topics / Why does arduino shows “fingerprint sensor not found” even after connecting the fingerprint module properly?

Why does arduino shows “fingerprint sensor not found” even after connecting the fingerprint module properly?

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Microcontroller › Arduino › Why does arduino shows “fingerprint sensor not found” even after connecting the fingerprint module properly?

  • This topic has 9 replies, 6 voices, and was last updated 6 years, 3 months ago by Muhammad Muaaz Khan.
Viewing 10 posts - 1 through 10 (of 10 total)
  • Author
    Posts
  • March 24, 2014 at 2:18 pm #2980
    Hemali
    Participant

    Hi. I am final year cse student. We are creating a project “secured login through fingerprint module” wherein we can login in any website without typing password , directly through fingerprint. Now the problem is our arduino is not detecting the fingerprint module. It always shows “fingerprint sensor not found :(” can anyone pls help me? I am new to arduino and I have no idea regarding how it works. Please help

    March 24, 2014 at 5:27 pm #11375
    Ganesh Selvaraj
    Participant

    We need you to give us more details about this, like what type of module you are using,etc. And the code too. Then only we will be able to help.

    March 25, 2014 at 5:01 am #11380
    Hemali
    Participant

    we are using arduino uno and fingerprint sensor 1125.

     

    our code is as follows….the underlined part is always coming as an output….any idea whats wrong withg this code?

     

     

     

     

     

    #include <Adafruit_Fingerprint.h>
    #if ARDUINO >= 100
     #include <SoftwareSerial.h>
    #else
     #include <NewSoftSerial.h>
    #endif

    uint8_t getFingerprintEnroll(uint8_t id);

    // pin #2 is IN from sensor (GREEN wire)
    // pin #3 is OUT from arduino  (WHITE wire)
    #if ARDUINO >= 100
    SoftwareSerial mySerial(2, 3);
    #else
    NewSoftSerial mySerial(2, 3);
    #endif

    Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

    void setup() 
    {
      Serial.begin(9600);
      Serial.println(“fingertest”);

      // 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);
      }
    }

    void loop()                     // run over and over again
    {
      Serial.println(“Type in the ID # you want to save this finger as…”);
      uint8_t id = 0;
      while (true) {
        while (! Serial.available());
        char c = Serial.read();
        if (! isdigit(c)) break;
        id *= 10;
        id += c – ‘0’;
      }
      Serial.print(“Enrolling ID #”);
      Serial.println(id);
     
      while (!  getFingerprintEnroll(id) );
    }

    uint8_t getFingerprintEnroll(uint8_t id) {
      uint8_t p = -1;
      Serial.println(“Waiting for valid finger to enroll”);
      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();
      }

      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!
      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;
      }  
     
      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;
      }  
    }
     

    April 24, 2015 at 6:28 pm #12829
    bhargav04
    Participant

    u can check the connetion….Rx,Tx,VCC and Gnd…

     

    Then it will work..

    May 17, 2015 at 8:00 am #12897
    how
    Participant

    Same project….the program can run and detect the fingerprint . but after the program run a few mins it can detect the fingerprint sensor

    May 17, 2015 at 8:02 am #12898
    how
    Participant

    When u reopen the serial monitor it run again. What the problem????

    May 18, 2015 at 9:14 am #12902
    how
    Participant

    same project……..using arduino mega………the program can runand the fingerprint can detected. but after the program run a few mins , the fingerprint cannot be detected. after reopen the serial monitar the program again……………….wat the problems??????

    May 18, 2015 at 9:16 am #12903
    how
    Participant

    same project……..using arduino mega………the program can runand the fingerprint can detected. but after the program run a few mins , the fingerprint cannot be detected. after reopen the serial monitar the program again……………….wat the problems??????

    April 26, 2016 at 12:03 pm #13898
    SAI VISWANADH KINTALI
    Participant

    Im using R305 FINGERPRINT SENSOR and ARDUINO UNO. Im facing the same issue. can anyone help me with this..?

    And the code is :

     

     
     
     
    #include <Adafruit_Fingerprint.h>
    #include <SoftwareSerial.h>
     
    int getFingerprintIDez();
     
    // pin #2 is IN from sensor (GREEN wire)
    // pin #3 is OUT from arduino (WHITE wire)
    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/…
     
    Serial.begin(9600);
    Serial.println("Adafruit finger detect test");
     
    // 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);
    }
    Serial.println("Waiting for valid finger…");
    }
     
    void loop() // run over and over again
    {
    getFingerprintIDez();
    delay(50); //don't ned to run this at full speed.
    }
     
    uint8_t getFingerprintID() {
    uint8_t p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
    Serial.println("Image taken");
    break;
    case FINGERPRINT_NOFINGER:
    Serial.println("No finger detected");
    return p;
    case FINGERPRINT_PACKETRECIEVEERR:
    Serial.println("Communication error");
    return p;
    case FINGERPRINT_IMAGEFAIL:
    Serial.println("Imaging error");
    return p;
    default:
    Serial.println("Unknown error");
    return p;
    }
     
    // OK success!
     
    p = finger.image2Tz();
    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!
    p = finger.fingerFastSearch();
    if (p == FINGERPRINT_OK) {
    Serial.println("Found a print match!");
    } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
    } else if (p == FINGERPRINT_NOTFOUND) {
    Serial.println("Did not find a match");
    return p;
    } else {
    Serial.println("Unknown error");
    return p;
    }
     
    // found a match!
    Serial.print("Found ID #"); Serial.print(finger.fingerID);
    Serial.print(" with confidence of "); Serial.println(finger.confidence);
    }
     
    // returns -1 if failed, otherwise returns ID #
    int getFingerprintIDez() {
    uint8_t p = finger.getImage();
    if (p != FINGERPRINT_OK) return –1;
     
    p = finger.image2Tz();
    if (p != FINGERPRINT_OK) return –1;
     
    p = finger.fingerFastSearch();
    if (p != FINGERPRINT_OK) return –1;
     
    // found a match!
    Serial.print("Found ID #"); Serial.print(finger.fingerID);
    Serial.print(" with confidence of "); Serial.println(finger.confidence);

    return finger.fingerID;

    }

    April 26, 2016 at 6:48 pm #13899
    Muhammad Muaaz Khan
    Participant

    Please Can any one help me on this code I am working with PIC 16F877A controller On mikroC compiler. My code work right but i it not stop while loop(1) when I pressed switch PORTD.F2 can any one tell me how I stop it and how I am going to Exit from whole loop(1) when I pressed PORTD.F2 == 0
    void main()
    {
    TRISD.F0 = 1; //Configure 1st bit of PORTD as input
    TRISD.F1 = 1; //Configure 1st bit of PORTD as input
    TRISD.F2 = 1; //Configure 1st bit of PORTD as input
    TRISD.F3 = 1; //Configure 1st bit of PORTD as input
    TRISB.F0 = 0; //Makes PORTB0 or RB0 Output Pin
    TRISB.F1 = 0; //Makes PORTB1 or RB0 Output Pin
    TRISB.F2 = 0; //Makes PORTB0 or RB0 Output Pin
    TRISB.F3 = 0; //Makes PORTB1 or RB0 Output Pin
    TRISB.F4 = 0; //Makes PORTB0 or RB0 Output Pin
    TRISB.F5 = 0; //Makes PORTB1 or RB0 Output Pin
    TRISB.F6 = 0; //Makes PORTB0 or RB0 Output Pin
    TRISB.F7 = 0; //Makes PORTB1 or RB0 Output Pin

    while(1) //Infinite Loop
    {
    if(PORTD.F1 == 0) //If the switch is pressed
    {
    PORTB.F0 = 1; //LED ON
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 1; //LED OFF
    PORTB.F4 = 1; //LED ON
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 1; //LED ON
    Delay_ms(2000); //1 Second Delay
    PORTB.F0 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF
    }
    if(PORTD.F0 == 0) //If the switch is pressed
    {
    PORTB.F1 = 1; //LED ON
    PORTB.F0 = 0; //LED OFF
    PORTB.F2 = 1; //LED ON
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 1; //LED ON
    PORTB.F6 = 1; //LED ON
    PORTB.F7 = 0; //LED OFF
    Delay_ms(2000); //1 Second Delay
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF

    }
    if(PORTD.F3 == 0) //If the switch is pressed
    {
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF
    Delay_ms(5000); //1 Second Delay
    }
    if(PORTD.F2 == 0) //If the switch is pressed
    {
    while(1) //Infinite Loop
    {
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 1; //LED ON
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED ON
    Delay_ms(500); //1 Second Delay
    PORTB.F3 = 1; //LED ON
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 1; //LED ON
    PORTB.F2 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF
    Delay_ms(1000); //1 Second Delay
    PORTB.F0 = 1; //LED ON
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 1; //LED ON
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF
    Delay_ms(100); //1 Second Delay Both legs are off
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFf
    Delay_ms(500); //1 Second Delay second leg Left leg
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 1; //LED ON
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFF
    Delay_ms(500); //1 Second Delay
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 1; //LED ON
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 1; //LED ON
    Delay_ms(1000); //1 Second Delay
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 1; //LED ON
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 1; //LED ON
    PORTB.F7 = 0; //LED OFF
    Delay_ms(100); //1 Second Delay Both legs are off
    PORTB.F0 = 0; //LED OFF
    PORTB.F1 = 0; //LED OFF
    PORTB.F2 = 0; //LED OFF
    PORTB.F3 = 0; //LED OFF
    PORTB.F4 = 0; //LED OFF
    PORTB.F5 = 0; //LED OFF
    PORTB.F6 = 0; //LED OFF
    PORTB.F7 = 0; //LED OFf
    Delay_ms(1000); //1 Second Delay
    }
    }
    }
    }

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