ARDUINO FINGERPRINT SCANNER WITH 16X2 LCD
DESCRIPTION
this instructable is based and inspired by Arduino LCD tutorial and fingerprint scanner from Adafruit (http://www.adafruit.com/product/751). I have added 16x2 LCD into the fingerprint to be able to see the status of the process of fingerprint scanning.
this is my first instructable, you are very welcome to comment and share.
materials:
Arduino Uno
16x2 LCD
fingerprint sensor
10k potentionmeter
220ohms resistor = 3pcs
red LED
green LED
jumper wires
breadboard
future improvements to be carried out:
1. auto shutdown when no input is detected within specified time to save power.
2. wake up function
3. integrate more sensor or inputs to activate finger scanning within predetermined scenario
4. use actuator to use for an application
please follow the instructions given from adafruit tutorial http://www.adafruit.com/product/751 on how to connect the fingerprint sensor to the arduino during enrollment process. download the software for windows and install in your computer. enrolling the fingerprint using the software makes the process a lot easier.
make sure to add the adafruit library to your arduino library.
go to http://arduino.cc/en/Tutorial/LiquidCrystalSerial for tutorial of the LCD and the instructions on how to connect the components.
3 More Images
copy and paste the codes below which i had modified in order to accommodate fingerprint scanning and display the results on LCD.
/***************************************************
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. BSD license, all text above must be included in any redistribution ****************************************************/
/**********************MODIFIED BY PELEGREN of bedRoonics Labs**********************************/
/********************** ARDUINO FINGERPRINT SCANNER with 16x2 LCD monitor***************/
#include
#include
#include
#include
int getFingerprintIDez();
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino (WHITE wire)
SoftwareSerial mySerial(2, 3);
LiquidCrystal lcd(9, 8, 7, 6, 5, 4); // initialize the library with the numbers of the interface pins
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
void setup()
{ Serial.begin(9600); // initialize the serial communications:
lcd.begin(16,2); lcd.setCursor(0,0); lcd.print("Scan your finger");
pinMode(13,OUTPUT);
pinMode(12,OUTPUT);
pinMode(11, OUTPUT);
pinMode(A0, INPUT);
finger.begin(57600); // set the data rate for the sensor serial port }
void loop() // run over and over again
{
getFingerprintID();
delay(100);
digitalWrite (13,HIGH);
}
uint8_t getFingerprintID()
{ uint8_t p = finger.getImage();
switch (p)
{
case FINGERPRINT_OK:
lcd.clear();
lcd.print(" Image taken... ");
delay(1000);
break;
case FINGERPRINT_NOFINGER:
return p;
case FINGERPRINT_PACKETRECIEVEERR:
return p;
case FINGERPRINT_IMAGEFAIL:
return p;
default:
return p; }
// OK success!
p = finger.image2Tz();
switch (p) {
case FINGERPRINT_OK:
break;
case FINGERPRINT_IMAGEMESS:
return p;
case FINGERPRINT_PACKETRECIEVEERR:
return p;
case FINGERPRINT_FEATUREFAIL:
return p;
case FINGERPRINT_INVALIDIMAGE:
return p;
default:
return p; }
// OK converted!
p = finger.fingerFastSearch();
if (p == FINGERPRINT_OK)
{
lcd.clear();
lcd.print(" Found match! ");
digitalWrite(11, HIGH);
delay(1000);
digitalWrite(11,LOW); // turn on green LED to indicate match
}
else if(p == FINGERPRINT_NOTFOUND)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Did not match! ");
delay(1000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" scan finger! ");
return p;
}
else
{ return p; }
// IF FOUND A MATCH............
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Found ID #");
lcd.print(finger.fingerID);
lcd.setCursor(0,1);
lcd.print("confidence ");
lcd.print(finger.confidence); }
// returns -1 if failed, otherwise returns ID #
int getFingerprintIDez() {
uint8_t p = finger.getImage();
if (p != FINGERPRINT_OK) return -1;
p = finger.image2Tz();
if (p != FINGERPRINT_OK) return -1;
p = finger.fingerFastSearch();
if (p != FINGERPRINT_OK) return -1;
// found a match!
digitalWrite(13, LOW);
delay(10);
digitalWrite(13, HIGH);
delay(10);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Found ID # ");
lcd.print(finger.fingerID);
lcd.setCursor(0, 1);
lcd.print("confidence ");
lcd.print(finger.confidence);
return finger.fingerID;
}