I am a beginner with Arduino and need help storing fingerprint IDs in one address without overriding the previous data. I will be hoping to bed now since its late
Full Code:
#include <Adafruit_Fingerprint.h>
#include <EEPROM.h>
#include <LiquidCrystal_I2C.h>
#include "OneButton.h"
LiquidCrystal_I2C lcd(0x27, 16, 2);
SoftwareSerial fingerSerial(2, 3);
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&fingerSerial);
OneButton pushButton = OneButton(A3, true, true);
int count = 1;
bool regMode = false;
uint8_t id;
void (*resetFunc)(void) = 0;
void setup() {
// put your setup code here, to run once:
// Initialize the modules
Serial.begin(9600);
// Initialize the lcd
lcd.init();
lcd.backlight();
displayText(false, 0, 0, F("Initializing"));
displayText(false, 0, 1, F("Data"));
// Initialize the fingeprint if not found then reset the arduino
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
finger.begin(57600);
if (finger.verifyPassword()) {
displayText(true, 0, 0, F("Fingerprint"));
displayText(false, 1000, 1, F("Initialize"));
} else {
displayText(true, 0, 0, F("Fingerprint"));
displayText(false, 1000, 1, F("Not Initialize"));
displayText(false, 0, 0, F("Rebooting"));
displayText(false, 1000, 1, F("System"));
delay(1000);
resetFunc();
while (1) { delay(1); }
}
finger.getTemplateCount();
if (finger.templateCount == 0) {
displayText(true, 0, 0, F("No Finger"));
displayText(false, 2000, 1, F("Enrolled"));
} else {
displayText(true, 0, 0, String(finger.templateCount) + F(" Finger"));
displayText(false, 2000, 1, F("Enrolled"));
}
displayText(true, 0, 0, F("Attendance"));
displayText(false, 0, 1, F("System"));
// Button Events
pushButton.attachClick(onSingleClick);
pushButton.attachDoubleClick(onDoubleClick);
pushButton.attachMultiClick(onMultiClick);
}
void loop() {
// put your main code here, to run repeatedly:
int result = getFingerprintIDez();
if (result > 0) {
displayText(true, 0, 0, F("Fingerprint"));
displayText(false, 1000, 1, F("Enrolled"));
displayText(true, 0, 0, F("Attendance"));
displayText(false, 0, 1, F("System"));
return;
} else if (result == -2) {
displayText(true, 0, 0, F("Fingerprint"));
displayText(false, 1000, 1, F("Not Enrolled"));
displayText(true, 0, 0, F("Attendance"));
displayText(false, 0, 1, F("System"));
}
pushButton.tick();
}
void writeStringEEPROM(int address, String str) {
byte len = str.length();
EEPROM.write(address, len);
for (int i = 0; i < len; i++) {
EEPROM.write(address + 1 + i, str[i]);
}
}
String readStringEEPROM(int address) {
int len = EEPROM.read(address);
char data[len + 1];
for (int i = 0; i < len; i++) {
data[i] = EEPROM.read(address + 1 + i);
}
data[len] = '\0';
return String(data);
}
void incrementID() {
if (regMode) {
count++;
if (count > 127) {
count = 1;
}
}
}
void decrementID() {
if (regMode) {
count--;
if (count < 1) {
count = 1;
}
}
}
void centerText(int row, String text) {
int totalColumns = 16;
int textLength = text.length();
int startingColumn = (totalColumns - textLength) / 2;
lcd.setCursor(startingColumn, row);
lcd.print(text);
}
void displayText(bool clearScreen, int duration, int row, String text) {
if (clearScreen) {
lcd.clear();
}
centerText(row, text);
if (duration != 0) {
delay(duration);
lcd.clear();
}
}
void enroll() {
regMode = true;
displayText(true, 0, 0, F("Enter your ID:"));
while (regMode) {
displayText(false, 0, 1, String(count));
pushButton.tick();
}
}
void confirm() {
id = count;
String result = readStringEEPROM(1);
if (result.length() > 0 && result == String(count)) {
displayText(true, 0, 0, F("ID Already"));
displayText(false, 2000, 1, F("Registered!"));
regMode = false;
home();
} else {
getFingerprintEnroll();
regMode = false;
}
return;
}
void home() {
regMode = false;
count = 1;
displayText(true, 0, 0, F("Attendance"));
displayText(false, 0, 1, F("System"));
}
void onSingleClick() {
incrementID();
}
void onDoubleClick() {
decrementID();
}
void onMultiClick() {
int n = pushButton.getNumberClicks();
if (n == 3 && regMode) {
// Set back to home
home();
}
else if (n == 4 && !regMode) {
// Set to regMode
enroll();
}
else if (n == 5 && regMode) {
// Enroll the user
confirm();
}
else if (n == 10) {
displayText(true, 0, 0, F("Rebooting"));
displayText(false, 2000, 1, F("System"));
resetFunc();
}
}
uint8_t getFingerprintEnroll() {
int p = -1;
String flashString = F("Your ID: ");
String idString = String(id);
String combinedString = flashString + idString;
displayText(true, 1000, 0, combinedString);
displayText(false, 0, 0, F("Place your"));
displayText(false, 2000, 1, F("finger"));
while (p != FINGERPRINT_OK) {
p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
displayText(true, 0, 0, F("Image taken"));
break;
case FINGERPRINT_NOFINGER:
displayText(true, 0, 0, F("No Finger"));
displayText(false, 0, 1, F("Found"));
break;
case FINGERPRINT_PACKETRECIEVEERR:
displayText(true, 0, 0, F("Communication"));
displayText(false, 0, 1, F("Error"));
break;
case FINGERPRINT_IMAGEFAIL:
displayText(true, 0, 0, F("Imaging"));
displayText(false, 0, 1, F("Error"));
break;
default:
displayText(true, 0, 0, F("Unknown"));
displayText(false, 0, 1, F("Error"));
break;
}
}
// OK success!
p = finger.image2Tz(1);
switch (p) {
case FINGERPRINT_OK:
displayText(true, 0, 0, F("Image"));
displayText(false, 0, 1, F("Converted"));
break;
case FINGERPRINT_IMAGEMESS:
displayText(true, 0, 0, F("Image"));
displayText(false, 0, 1, F("Too Messy"));
return p;
case FINGERPRINT_PACKETRECIEVEERR:
displayText(true, 0, 0, F("Communication"));
displayText(false, 0, 1, F("Error"));
return p;
case FINGERPRINT_FEATUREFAIL:
displayText(true, 0, 0, F("Feature"));
displayText(false, 0, 1, F("Not Found"));
return p;
case FINGERPRINT_INVALIDIMAGE:
displayText(true, 0, 0, F("Feature"));
displayText(false, 0, 1, F("Not Found"));
return p;
default:
displayText(true, 0, 0, F("Unknown"));
displayText(false, 0, 1, F("Error"));
return p;
}
displayText(true, 0, 0, F("Remove your"));
displayText(false, 2000, 1, F("finger"));
p = 0;
while (p != FINGERPRINT_NOFINGER) {
p = finger.getImage();
}
p = -1;
displayText(true, 0, 0, F("Place your"));
displayText(false, 0, 1, F("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(F("Communication error"));
break;
case FINGERPRINT_IMAGEFAIL:
Serial.println(F("Imaging error"));
break;
default:
Serial.println(F("Unknown error"));
return;
}
}
// 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(F("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(F("Communication error"));
return p;
} else if (p == FINGERPRINT_ENROLLMISMATCH) {
Serial.println(F("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) {
writeStringEEPROM(1, String(id));
displayText(true, 0, 0, F("Your Fingerprint"));
displayText(false, 2000, 1, F("ID is Stored"));
id = 1;
count = 1;
displayText(false, 0, 0, F("Registering"));
displayText(false, 1000, 1, F("Data"));
resetFunc();
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println(F("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;
}
}
uint8_t getimg_data[] = { FINGERPRINT_GETIMAGE };
#define FINGERPRINT_COMMANDPACKET 0x1 //!< Command packet
Adafruit_Fingerprint_Packet packet(FINGERPRINT_COMMANDPACKET, sizeof(getimg_data), getimg_data);
const Adafruit_Fingerprint_Packet startPacket(FINGERPRINT_COMMANDPACKET, sizeof(getimg_data), getimg_data);
bool is_waiting_for_response = false;
int better_get_image() {
// Serial.println("Get better image()");
if (!is_waiting_for_response) {
packet = startPacket;
finger.writeStructuredPacket(packet);
is_waiting_for_response = true;
// Serial.println("Send command packet");
return -2; // nothing yet! :)
} else {
/* check if there is any serial data at all */
if (fingerSerial.available() == 0) {
/* FAST EXIT TO MAKE BUTTON WORK */
return -2;
}
// Serial.println("Got response");
// we definitely have some amount of data now, read it
if (finger.getStructuredPacket(&packet) != FINGERPRINT_OK) {
is_waiting_for_response = false;
return FINGERPRINT_PACKETRECIEVEERR;
}
// we have received something, so evaluate the result in all cases
is_waiting_for_response = false;
if (packet.type != FINGERPRINT_ACKPACKET)
return FINGERPRINT_PACKETRECIEVEERR;
return packet.data[0];
}
}
// returns -1 if failed, otherwise returns ID #
int getFingerprintIDez() {
uint8_t p = better_get_image();
if (p != FINGERPRINT_OK) return -1;
p = finger.image2Tz();
if (p != FINGERPRINT_OK) return -1;
p = finger.fingerFastSearch();
if (p == FINGERPRINT_OK) {
return finger.fingerID;
} else if (p == FINGERPRINT_NOTFOUND) {
return -2;
} else {
return -1;
}
}