When I run my fingerprint reader on Arduino UNO with the enroll script, "Did not find fingerprint sensor 
I get the ``` error if the connection diagram is
GND - GND
TX - 2
RX-3
VI+ - 3.3V
There are more pins on the back of the fingerprint reader that can be connected, but I don't know where and how to connect them. I would be very happy if you could help me.
Then don't connect them.
You forgot to post your code and link to your sensor.
oh sorry
Sensor module: AS608
code;
/***************************************************
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.
Small bug-fix by Michael cochez
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Adafruit_Fingerprint.h>
#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)
// For UNO and others without hardware serial, we must use software serial...
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino (WHITE wire)
// Set up the serial port to use softwareserial..
SoftwareSerial mySerial(2, 3);
#else
// On Leonardo/M0/etc, others with hardware serial, use hardware serial!
// #0 is green wire, #1 is white
#define mySerial Serial1
#endif
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
uint8_t id;
void setup()
{
Serial.begin(9600);
while (!Serial); // For Yun/Leo/Micro/Zero/...
delay(100);
Serial.println("\n\nAdafruit 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) { delay(1); }
}
Serial.println(F("Reading sensor parameters"));
finger.getParameters();
Serial.print(F("Status: 0x")); Serial.println(finger.status_reg, HEX);
Serial.print(F("Sys ID: 0x")); Serial.println(finger.system_id, HEX);
Serial.print(F("Capacity: ")); Serial.println(finger.capacity);
Serial.print(F("Security level: ")); Serial.println(finger.security_level);
Serial.print(F("Device address: ")); Serial.println(finger.device_addr, HEX);
Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);
Serial.print(F("Baud rate: ")); Serial.println(finger.baud_rate);
}
uint8_t readnumber(void) {
uint8_t num = 0;
while (num == 0) {
while (! Serial.available());
num = Serial.parseInt();
}
return num;
}
void loop() // run over and over again
{
Serial.println("Ready to enroll a fingerprint!");
Serial.println("Please type in the ID # (from 1 to 127) you want to save this finger as...");
id = readnumber();
if (id == 0) {// ID #0 not allowed, try again!
return;
}
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.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(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;
}
return true;
}
That tells just the chip.
And that chip is quite complex, having even 3 internal voltage regulators.
Do you have some documentation from the vendor of the sensor?
If not, you could use this tutorial from Adafruit:
First control you have correct and firmly connected wiring.
I did everything here exactly, but I did not get any results. I did not install the ch340 driver. Could this be a problem? But I can install my other codes and software, so I do not think it is because of the driver.
Then it's not related to your problem.
Are you powering sensor from 5V now?
I also powered it with 3.3V, I also powered it with 5V, unfortunately there was no change.
Is your wiring firm, solid and short?
Is your uno R3 or R4?
Yes, UNO R3
try with 9600
finger.begin(9600);
I still get the same error
Did you already try to swap the rx/tx ?
SoftwareSerial mySerial(3, 2);
Yes, I changed the location of the rx tx but I did not get any results.
You could try inverted rx/tx with both baud rates 57600 and 9600.
Then I'm getting out of suggestions for Uno.
If you have Mega or Esp32 you could try with hardware serial.
Is the led on sensor pcb illuminating when powered on?
There is no LED on the module, but it still works, I can see the light coming out of it, now I will try it on esp32.
In that case only 3.3V!
Yes, 3.3V im try on esp32 but same error
how is your code?
I connected it to the d2 and d3 pins of the fingerprint sensor's rx and tx pin, but I still got the same error. I also connected it to the ex tx pins in different ways, but I still got the same error.
EL file SHA256: a8b131741228430f
1 panic'ed (Unhandled debug exception).
Debug exception reason: BREAK instr
Core 1 register dump:
PC : 0x400803c0 PS : 0x00060f36 A0 : 0xa5a5a5a5 A1 : 0x3ffc2680
A2 : 0x3ffb1fcc A3 : 0x3ffc2240 A4 : 0x00000000 A5 : 0xfff8f0ff
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x800df0f4 A9 : 0x3ffc25b0
A10 : 0x3ffc2560 A11 : 0x3ffc1a64 A12 : 0x00000014 A13 : 0x00060124
A14 : 0xfffbfff0 A15 : 0x00000046 SAR : 0x0000001f EXCCAUSE: 0x00000001
EXCVADDR: 0xa5a5a585 LBEG : 0x40085dc0 LEN : 0x40085dcb LCOUN : 0xffffffff
Backtrace: 0x400803bd:0x3ffc2680 0x65a5a5a2:0x3ffc2470 |<-CORRUPTED