The one with the sticker on it, if no sticker, it has CLDZ on it
Step 3: Attach our Buzzer and our Ground Wire
What is a buzzer? How does it work?
Its full name is the piezoelectric buzzer. It is made up of a small disc. When you apply current to the buzzer, it expands the disc, and then shrinks it. This makes sound waves!
We will not be uploading the standard Firmata today, we will need to use a modified version