Fingerprint Door Lock Using Arduino Uno

In that i am using 2 3 digital pins of arduino for data transfer to the fingerprint i tried other pin configurations for this but it didn t work but as i am connecting lcd it also requires same 2 3 digital pins of arduino and it is not possible for me to use 2 and 3 pins of arduino for both lcd and fingerprint sensor for data transfer.

Fingerprint door lock using arduino uno.

Digital door lock using arduino circuit diagram. I am using fingerprint module r307 and lcd together. Not only to ensure door security this project also make certain to assist in fields like forensics crime investigation personal identification attendance system and there is a lot more. The default pins for serial communication on the arduino uno are pin 0 rxd and pin 1 txd of the board but we are going to use other pins for serial communication.

The project arduino fingerprint sensor lock is simply fabricated around arduino board. Using pwm the master can send different voltages to the slave. If you are using arduino mega then there is no need to use analog. We used analog pins since we need more that 14 digitals pins for this project.

Introductionthe fingerprint door lock as the name suggests is an electronic door lock that can be installed on almost any access point in your house. Arduino fingerprint door lock with keypad and lcd. First of all we will make the connection to the 4 4 keypad. They are connected through a single wire that goes from a pwm pulse width modulation enabled pin on the master to an analog pin on the slave.

Conclusion in this tutorial post we learned how to set up a fingerprint sensor and how to use it with our arduino you can use this knowledge to control a. In the future there could be many more applications like fingerprint based driving licences bank accounts operation and so on. Therefore there is one master arduino which controls the servo oled and fingerprint sensor while a slave arduino controls the leds. For connecting the keypad with the arduino we are using both analog and digital pins.

This simple fingerprint door unlock project using arduino can be very useful for door security forensics crime investigation personal identification attendance system and much more. You can add a solenoid instead of this led and make a fingerprint door lock which could be a brief tutorial for the future but for this tutorial led indication is our eureka. Define servopin 9 define pin number to which servo motor is connected define durationtime 3000 define the time it remains in the open position of the door lock miliseconds define servomin 0 open position define servomax 90 closed position. Make sure you get a fingerprint sensor that works with the arduino through the serial communication.