Fingerprint Locker using (Internet of things)

IOT Project--

Fingerprint sensors in IoT are an innovative way to merge biometric security with the connected world, enabling devices to identify and authenticate users seamlessly. Unlike traditional passwords or PINs, fingerprint recognition provides a unique and almost foolproof method of verifying identity, making it extremely valuable for smart homes, wearable devices, industrial automation, and personal electronics. In the context of IoT, these sensors are embedded in devices that are connected to the internet, allowing secure and automated access control, personalized settings, and activity tracking. For example, a smart lock with a fingerprint sensor can grant entry only to recognized users, while a fitness tracker can ensure that the data being recorded belongs to the right person. The integration of fingerprint sensors with IoT relies on capturing the fingerprint image, converting it into digital data, and then comparing it against stored templates, often leveraging cloud platforms for storage, processing, and advanced analytics. This combination not only enhances security but also adds convenience, as users no longer need to remember complex passwords. Moreover, cloud-based IoT systems can analyze usage patterns, detect anomalies, and provide real-time alerts, making fingerprint-enabled devices smarter and more adaptive. By connecting biometric authentication to the vast ecosystem of IoT, fingerprint sensors are helping to create a world where security is automatic, personalized, and deeply integrated into everyday technology.

1. IOT PROJECT Fingerprint Locker

2. 2 Team Members Alex Francis - TIT2021057 Ruchita Yapuram - TIT2021087 Shrinidhi Gatti - TIT2021018

3. Components used: 3 Finger Print Sensor Solenoid Lock IRFZ44N Power MOSFET

4. Components used: 4 Power Adapter Arduino Uno R3 Wooden Plank

5. Components used: 5 Hinges Door Handle

6. 6 Assembly 1. Cut a wooden plank into 6 square pieces. 2. Assemble the pieces in the shape of a cube. 3. Attach the door using hinges and install a handle to it. 4. Stick the Arduino board and finger print sensor using double sided tape. 5. Attach the Solenoid Lock to the door.

7. 7

8. 8 Power Adapter & USB Connection

9. Upload the Registration code & R egister your fingerprint 9

10. 10 Open serial monitor

11. Place the finger on the fingerprint sensor twice. first time to register the fingerprint & the second time to confirm the registered fingerprint. 11

12. Upload the fingerprint unlock code 12

13. 13 Enrollment code #include < Adafruit_Fingerprint.h > #include < SoftwareSerial.h > SoftwareSerial mySerial (2, 3); Adafruit_Fingerprint finger = Adafruit_Fingerprint (& mySerial ); uint8_t id; void setup() { Serial.begin (9600) ; while (!Serial); delay(100); Serial.println ("\n\ nFingerprint sensor enrollment "); finger.begin (57600 if ( finger.verifyPassword ()) { Serial.println ("Found fingerprint sensor!"); } else { Serial.println ("Did not find fingerprint sensor :("); while (1) { delay(1); } } } uint8_t readnumber (void) { uint8_t num = 0; while ( num == 0) { while (! Serial.available ()); num = Serial.parseInt (); } return num ; } void loop() { 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) { return; } Serial.print ("Enrolling ID #"); Serial.println (id); while (! getFingerprintEnroll ()); }

14. 14 Enrollment code 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 (); /*takes the status of the sensor and image of the fingerprint. FINGERPRINT_OK on success FINGERPRINT_IMAGEMESS if image is too messy FINGERPRINT_PACKETRECIEVEERR on communication error FINGERPRINT_FEATUREFAIL on failure to identify fingerprint features FINGERPRINT_INVALIDIMAGE on failure to identify fingerprint features*/ switch (p) { case FINGERPRINT_OK: Serial.println ("Image taken"); break; case FINGERPRINT_NOFINGER: Serial.println ("."); break; case FINGERPRINT_PACKETRECIEVEERR: Serial.println ("Communication error"); break; case FINGERPRINT_IMAGEFAIL: Serial.println ("Imaging error"); break; default: Serial.println ("Unknown error"); break; } } 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; }

15. 15 //second image 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; } } Enrollment code // OK success! //converts the image 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; }

16. 16 // OK converted! // matches the fingerprint Serial.print ("Creating model for #"); Serial.println (id); p = finger.createModel (); /*Ask the sensor to take two print feature template and create a model. Returns FINGERPRINT_OK on success FINGERPRINT_PACKETRECIEVEERR on communication error FINGERPRINT_ENROLLMISMATCH on mismatch of fingerprints */ 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; } Enrollment code //store 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; } }

17. 17 #include < Adafruit_Fingerprint.h > #include < SoftwareSerial.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 (" fingertest "); pinMode (12, OUTPUT); // 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); } } finger.getTemplateCount (); Serial.print ("Sensor contains "); Serial.print ( finger.templateCount ); Serial.println (" templates"); Serial.println ("Waiting for valid finger..."); } Fingerprint Unlock code void loop() // run over and over again { getFingerprintIDez (); delay(50); //don't ned to run this at full speed. digitalWrite (12, LOW); } uint8_t getFingerprintID () { uint8_t p = finger.getImage (); switch (p) { case FINGERPRINT_OK: Serial.println ("Image taken"); break; case FINGERPRINT_NOFINGER: Serial.println ("No finger detected"); return p; case FINGERPRINT_PACKETRECIEVEERR: Serial.println ("Communication error"); return p; case FINGERPRINT_IMAGEFAIL: Serial.println ("Imaging error"); return p; default: Serial.println ("Unknown error"); return p; }

18. 18 // OK success! p = finger.image2Tz(); 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; } Fingerprint Unlock code // OK converted! p = finger.fingerFastSearch (); if (p == FINGERPRINT_OK) { Serial.println ("Found a print match!"); } else if (p == FINGERPRINT_PACKETRECIEVEERR) { Serial.println ("Communication error"); return p; } else if (p == FINGERPRINT_NOTFOUND) { Serial.println ("Did not find a match"); return p; } else { Serial.println ("Unknown error"); return p; } // found a match! Serial.print ("Found ID #"); Serial.print ( finger.fingerID ); Serial.print (" with confidence of "); Serial.println ( finger.confidence ); return finger.fingerID ; }

19. 19 // 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 (12, HIGH); delay(3000); digitalWrite (12, LOW); Serial.print ("Found ID #"); Serial.print ( finger.fingerID ); Serial.print (" with confidence of "); Serial.println ( finger.confidence ); return finger.fingerID ; } Fingerprint Unlock code

20. THANK YOU! 20