5. The LCD screen uses 4 pins that get connected to the microcontroller. Use male-female jumper wires to make these connections (See Figure 2.5 below):
a. Connect VCC on the LCD to the (+) rail on the breadboard.
b. Connect GND on the LCD to GND on the microcontroller
c. Connect SDA on the LCD to SDA on the microcontroller
d. Connect SCL on the LCD to SCL on the microcontroller
6. Connect 3.3V on the microcontroller to the (+) rail on the breadboard using a male-male jumper wire. This will power the LCD.
7. Connect your button. Connect one side of the button to the (+) rail on the breadboard using a jumper. Connect the other side of the button to Pin A4 on your microcontroller using a second jumper.