AS608 Fingerprint Sensor not working with ESP32 (Serial Error) (resolved)

Hi everyone,

I'm new to the ESP32 world and currently working on a university project where I need to use the AS608 fingerprint sensor with my ESP32 (ESP-32S with CP2102 driver). I have tried various configurations using different UART pins, but no matter what I try, I always get the following message in the serial monitor:

Adafruit Fingerprint sensor enrollment
Did not find fingerprint sensor :(

I am using the example code from the Adafruit Fingerprint Library, as shown below:

#include <Adafruit_Fingerprint.h>

#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)
SoftwareSerial mySerial(2, 3);
#else
#define mySerial Serial1
#endif

Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

void setup() {
  Serial.begin(9600);
  while (!Serial);
  delay(100);
  Serial.println("\n\nAdafruit Fingerprint sensor enrollment");
  
  finger.begin(57600);
  if (finger.verifyPassword()) {
    Serial.println("Found fingerprint sensor!");
  } else {
    Serial.println("Did not find fingerprint sensor :(");
    while (1) { delay(1); }
  }
}

void loop() {
  // Enrollment logic...
}

No matter which GPIO pins I try, it always gives the same result: "Did not find fingerprint sensor :(". I have also double-checked my wiring, and the baud rate seems to be correctly set at 57600.

Has anyone experienced a similar issue, or is there something I might be missing? I would really appreciate any advice, as this is for a university project, and I am running out of time.

Thanks in advance for your help!

PS: I ATTACH PHOTO OF MY ESP32 AND MY AS608

8 posts - 6 participants

Read full topic