Fingerprint Door Lock Using Arduino Uno

Therefore there is one master arduino which controls the servo oled and fingerprint sensor while a slave arduino controls the leds.

Fingerprint door lock using arduino uno.

First of all we will make the connection to the 4 4 keypad. I am using fingerprint module r307 and lcd together. 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. If you are using arduino mega then there is no need to use analog.

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. It uses a keypad and fingerprint scanner to grant a user access by controlling an electric door s. 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.

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. 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. Using pwm the master can send different voltages to the slave. Digital door lock using arduino circuit diagram.

In the future there could be many more applications like fingerprint based driving licences bank accounts operation and so on. 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. Arduino fingerprint door lock with keypad and lcd. We used analog pins since we need more that 14 digitals pins for this project.

The project arduino fingerprint sensor lock is simply fabricated around arduino board. Adafruit fingerprint finger adafruit fingerprint myserial. First of all connect the fingerprint sensor to the 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.