Circuit
We will use I2C for communication between the ESP32 and the OLED display. For I2C, two GPIO pins need to be configured as SDA (Serial Data) and SCL (Serial Clock). On the ESP32, we can use any GPIO pins for I2C. We'll configure GPIO pin 18 as SCL and GPIO pin 23 as SDA. The VCC pin of the OLED will be connected to the 3.3V pin of the ESP32, and the Ground pin will be connected to the ESP32's ground.
| ESP32 Pin | Wire | OLED Pin | Notes |
|---|---|---|---|
| 3.3V |
|
VCC | Supplies power to the OLED display. |
| GND |
|
Ground | Connects to the ground pin of the OLED. |
| GPIO 18 |
|
SCL | Connects the clock signal (SCL) for I2C communication. |
| GPIO 23 |
|
SDA | Connects the data signal (SDA) for I2C communication. |
