How To Delete Unwanted Fingerprint ID's Stored In Fingerprinrt Sensor R307 Using Arduino By Technoesolution | #arduinotutorial

Adafruit Fingerprint Sensor Library:- [Download]

/*
   Hello guys welcome back to "Techno-E-Solution"
   Tutorial Name:- How To Delete Unwanted Fingerprint ID's Stored In Fingerprinrt Sensor R307 Using Arduino
   Tutorial Video:- https://youtu.be/N7GKaq_0Udw
*/

#include <Adafruit_Fingerprint.h>
SoftwareSerial mySerial(2, 3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
void setup()  
{
  Serial.begin(9600);
  while (!Serial);  // For Yun/Leo/Micro/Zero/...
  delay(100);
  Serial.println("\n\nDelete Finger");
  // 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);
  }
}
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("Please type in the ID # (from 1 to 127) you want to delete...");
  uint8_t id = readnumber();
  if (id == 0) {// ID #0 not allowed, try again!
     return;
  }
  Serial.print("Deleting ID #");
  Serial.println(id);
  
  deleteFingerprint(id);
}
uint8_t deleteFingerprint(uint8_t id) {
  uint8_t p = -1;
  
  p = finger.deleteModel(id);
  if (p == FINGERPRINT_OK) {
    Serial.println("Deleted!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_BADLOCATION) {
    Serial.println("Could not delete in that location");
    return p;
  } else if (p == FINGERPRINT_FLASHERR) {
    Serial.println("Error writing to flash");
    return p;
  } else {
    Serial.print("Unknown error: 0x"); Serial.println(p, HEX);
    return p;
  }   
}