Make: Volume 82

9. MODIFY THE CODE

This step allows us to change the status of the

solenoid after a successful reading from the

fingerprint sensor. When the solenoid is given

power, it will retract.

Add int lock = 5; before void setup (){

Add pinMode(lock, OUTPUT); after void

setup (){

Where the code returns a successful attempt to

the serial monitor, add the following lines:

digitalWrite(lock, HIGH);

delay(5000);

digitalWrite(lock, LOW);

Upload the code to the Arduino and test the lock.

10. TEST THE LOCK

Give the sensor a few test runs. Don't be

discouraged if it doesn't work the first time. Every

attempt is a key part of the learning experience!

I used the Adafruit ...