I'm using Arduino nano, AS608 fingerprint sensor. but you can't point to this mistake to read your fingerprints. how to fix it?
Your post lack a significant info about your issue. We need to see your code and connection.
Read the forum guidelines to see how to properly ask a question and some good information on making a good post. You will get faster and better help if you post all your code as requested by the forum guidelines.
Please go back and fix your original post.
Also please describe what the hardware do you use.
Photos that clearly show your wiring can also be very helpful.
#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(F("Unknown error"));
// set the data rate for the sensor serial port
finger.begin(57600);
if (finger.verifyPassword()) {
Serial.println(F("Found fingerprint sensor!"));
} else {
Serial.println(F("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(F("Ready to enroll a fingerprint!"));
Serial.println(F("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(F("Enrolling ID #"));
Serial.println(id);
while (! getFingerprintEnroll() );
}
uint8_t getFingerprintEnroll() {
int p = -1;
Serial.print(F("Waiting for valid finger to enroll as #")); Serial.println(id);
while (p != FINGERPRINT_OK) {
p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println(F("Image taken"));
break;
case FINGERPRINT_NOFINGER:
Serial.println(F("."));
break;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
break;
case FINGERPRINT_IMAGEFAIL:
Serial.println(F("Imaging error"));
break;
default:
Serial.println(F("Unknown error"));
break;
}
}
// OK success!
p = finger.image2Tz(1);
switch (p) {
case FINGERPRINT_OK:
Serial.println(F("Image converted"));
break;
case FINGERPRINT_IMAGEMESS:
Serial.println(F("Image too messy"));
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return p;
case FINGERPRINT_FEATUREFAIL:
Serial.println(F("Could not find fingerprint features"));
return p;
case FINGERPRINT_INVALIDIMAGE:
Serial.println(F("Could not find fingerprint features"));
return p;
default:
Serial.println(F("Unknown error"));
return p;
}
Serial.println(F("Remove finger"));
delay(2000);
p = 0;
while (p != FINGERPRINT_NOFINGER) {
p = finger.getImage();
}
Serial.print(F("ID ")); Serial.println(id);
p = -1;
Serial.println(F("Place same finger again"));
while (p != FINGERPRINT_OK) {
p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println(F("Image taken"));
break;
case FINGERPRINT_NOFINGER:
Serial.print(F("."));
break;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
break;
case FINGERPRINT_IMAGEFAIL:
Serial.println(F("Imaging error"));
break;
default:
Serial.println(F("Unknown error"));
break;
}
}
// OK success!
p = finger.image2Tz(2);
switch (p) {
case FINGERPRINT_OK:
Serial.println(F("Image converted"));
break;
case FINGERPRINT_IMAGEMESS:
Serial.println(F("Image too messy"));
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return p;
case FINGERPRINT_FEATUREFAIL:
Serial.println(F("Could not find fingerprint features"));
return p;
case FINGERPRINT_INVALIDIMAGE:
Serial.println(F("Could not find fingerprint features"));
return p;
default:
Serial.println(F("Unknown error"));
return p;
}
// OK converted!
Serial.print(F("Creating model for #")); Serial.println(id);
p = finger.createModel();
if (p == FINGERPRINT_OK) {
Serial.println(F("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(F("Unknown error"));
return p;
}
Serial.print(F("ID ")); Serial.println(id);
p = finger.storeModel(id);
if (p == FINGERPRINT_OK) {
Serial.println(F("Stored!"));
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return p;
} else if (p == FINGERPRINT_BADLOCATION) {
Serial.println(F("Could not store in that location"));
return p;
} else if (p == FINGERPRINT_FLASHERR) {
Serial.println(F("Error writing to flash"));
return p;
} else {
Serial.println(F("Unknown error"));
return p;
}
return true;
}
D2- yellow
D3-white cable
5V- red
GND- black
I didn't see in the photo, which cable is connected to which sensor pin. What is the green wire and why it doesn't connect to anywhere?
According to output in Serial monitor, your board has restarted during the read the sensor. It could be a bad connections...
When connecting green cable to D2, "Unknown error
Did not find fingerprint sensor :(" was pointing to a mistake
You didn't answer to my questions...
yellow/TX/- arduino D2
white /RX/- arduino D3
@anardelger
Are you starting to, dimly, see why schematics are the universal language in electronics? Your verbal responses leave us totally confused. Draw it out on the back of an envelope. Show and label ALL connections. Do not 'save pencil'.
Take a photo, and post it in your next reply in this topic.
Please show the link to your sensor module. The one that I found in the net needs a 3v3 power. Connecting it to 5v you can destroy the sensor.
Next - running the SoftwareSerial on baudrate above 19200 is not guaranteed. Lower the sensor baudrate or (better) use the hardware serial instead.
Your sensor needs a 3v3 power. Did you connected it to 5v?
connected to 3v3. the mistake is the same.
See the second part of #11 message
Thank you, can hardwarre be understood as A2,A3?
if that's the case,
"Unknown error
Did not find fingerprint sensor :("
How it related with serial baudrate?
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