Library compatible with PID 4750 sensor?

[caternuson]

Re this thread:
https://forums.adafruit.com/viewtopic.php?f=19&t=187741
Using this:
https://www.adafruit.com/product/4750

Intentionally placing wrong finger on second scan but not getting mismatch error.

** EDIT ** adding Serial Monitor output from running enroll sketch and intentionally using two different fingers:

Adafruit Fingerprint sensor enrollment
Found fingerprint sensor!
Reading sensor parameters
Status: 0x0
Sys ID: 0x0
Capacity: 80
Security level: 3
Device address: FFFFFFFF
Packet len: 128
Baud rate: 49664
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...
Enrolling ID #1
Waiting for valid finger to enroll as #1
.......................................Image taken
Image converted
Remove finger
ID 1
Place same finger again
..............Image taken
Image converted
Creating model for #1
Prints matched!
ID 1
Stored!
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...

[marcelchelo]

I second this, using this fingerprint sensor:
https://www.adafruit.com/product/4651

When purposely using different fingers during enrolling, a mismatched error is expected but it does not occur.

[aimgo]

I second this, using this fingerprint sensor: https://www.adafruit.com/product/4651

When purposely using different fingers during enrolling, a mismatched error is expected but it does not occur.

I also have this problem.

[caternuson]

I can reliably recreate this behavior with PID 4750 mentioned in initial post above.

But it's working OK testing with PID 4651.

Here's with the same finger, just to prove it does match as expected:

Adafruit Fingerprint sensor enrollment
Found fingerprint sensor!
Reading sensor parameters
Status: 0x4
Sys ID: 0x0
Capacity: 200
Security level: 3
Device address: FFFFFFFF
Packet len: 128
Baud rate: 57600
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...
Enrolling ID #1
Waiting for valid finger to enroll as #1
........................................................Image taken
Image converted
Remove finger
ID 1
Place same finger again
.................................................Image taken
Image converted
Creating model for #1
Prints matched!
ID 1
Stored!
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...

And here's with using different fingers. Tried four times but it never saw them as same.

Adafruit Fingerprint sensor enrollment
Found fingerprint sensor!
Reading sensor parameters
Status: 0x4
Sys ID: 0x0
Capacity: 200
Security level: 3
Device address: FFFFFFFF
Packet len: 128
Baud rate: 57600
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...
Enrolling ID #1
Waiting for valid finger to enroll as #1
...................................................................................................................Image taken
Image converted
Remove finger
ID 1
Place same finger again
.........................................Image taken
Image converted
Creating model for #1
Fingerprints did not match
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...
Enrolling ID #1
Waiting for valid finger to enroll as #1
..........................................................Image taken
Image converted
Remove finger
ID 1
Place same finger again
........................................Image taken
Image converted
Creating model for #1
Fingerprints did not match
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...
Enrolling ID #1
Waiting for valid finger to enroll as #1
............................................................................Image taken
Image converted
Remove finger
ID 1
Place same finger again
........................................................................Image taken
Image converted
Creating model for #1
Fingerprints did not match
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...

[caternuson]

Issue #120 is a repeat for PID 4651 behavior.

[krangchen]

Is there any progress on this? :)
I'm in the same boat than the initial author...

[markolino85]

Someone can try this code ? There is a modification for the security level and a manual comparison for the two images.
Just to be sure that the mismatch will be detected .

#include <Adafruit_Fingerprint.h>
#include <HardwareSerial.h>

// Configure UART
HardwareSerial mySerial(2); // Use UART2 (GPIO17 RX, GPIO16 TX)
Adafruit_Fingerprint finger(&mySerial);

void setup() {
  Serial.begin(115200); // Serial monitor
  mySerial.begin(57600); // Sensor baud rate

  // Initialize the sensor
  if (finger.begin()) {
    Serial.println("Sensor detected!");
    finger.setSecurityLevel(5); // Set the highest security level
    Serial.println("Security level set to 5 (maximum).");
  } else {
    Serial.println("Error: Unable to communicate with the sensor.");
    while (1);
  }
}

void loop() {
  Serial.println("Place your finger on the sensor...");
  if (getFingerprintEnroll() == FINGERPRINT_OK) {
    Serial.println("Fingerprint successfully saved!");
  } else {
    Serial.println("Error during enrollment. Please try again.");
  }
  delay(5000); // Wait a bit before retrying
}

uint8_t getFingerprintEnroll() {
  int id = 1; // Unique ID for each fingerprint
  Serial.print("Enrolling fingerprint with ID: ");
  Serial.println(id);

  // Step 1: Capture the first image
  while (finger.getImage() != FINGERPRINT_OK) {
    Serial.println("Place your finger correctly on the sensor.");
    delay(1000);
  }
  if (finger.image2Tz(1) != FINGERPRINT_OK) {
    Serial.println("Error converting the first image.");
    return FINGERPRINT_ERR;
  }
  Serial.println("First image captured. Remove your finger.");
  delay(2000);

  // Step 2: Capture the second image
  while (finger.getImage() != FINGERPRINT_NOFINGER);
  Serial.println("Place the same finger again.");
  delay(2000);

  while (finger.getImage() != FINGERPRINT_OK) {
    Serial.println("Place your finger correctly on the sensor.");
    delay(1000);
  }
  if (finger.image2Tz(2) != FINGERPRINT_OK) {
    Serial.println("Error converting the second image.");
    return FINGERPRINT_ERR;
  }
  Serial.println("Second image captured.");

  // Step 3: Manual comparison of the images
  if (finger.compare() != FINGERPRINT_OK) {
    Serial.println("The two images do not match. Please use the same finger.");
    return FINGERPRINT_ERR;
  }
  Serial.println("The two images match.");

  // Step 4: Create the fingerprint model
  if (finger.createModel() != FINGERPRINT_OK) {
    Serial.println("Error creating the fingerprint model.");
    return FINGERPRINT_ERR;
  }
  Serial.println("Fingerprint model created successfully.");

  // Step 5: Save the model in the sensor's memory
  if (finger.storeModel(id) != FINGERPRINT_OK) {
    Serial.println("Error saving the fingerprint model.");
    return FINGERPRINT_ERR;
  }

  Serial.println("Fingerprint model saved in the sensor's memory.");
  return FINGERPRINT_OK;
}