![]() We will learn to add more pins to our Arduino board using the PCF8574 module. You need more pins for your project to drive something. SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally if(!display.Imagine you build a project and then you just run out the pins. Source:, Language: Arduino # include # include # include # include # define SCREEN_WIDTH 128 // OLED display width # define SCREEN_HEIGHT 64 // OLED display height # define OLED_RESET -1 // Reset pin number, -1 means Arduino reset pin # define SCREEN_ADDRESS 0x3C // Address may be either 3C or 3d Adafruit_SSD1306 display (SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET) Copy and paste the following code as a new sketch on Arduino IDE. The sketch will show the classic “Hello World!” text on the display. Let’s try to show some text on our OLED display using a simple sketch. Displaying “Hello World” Text On OLED Display Using Arduino In my case, I changed the display address to 0x3C. You might need to change it depending on your display hardware. Note: By default, #define SCREEN_ADDRESS is set to 0x3D in the example provided by Adafruit. There you can select the appropriate example for your display size. On Arduino IDE, you can access them by going to File>Examples and then scrolling until you find the option ‘ Adafruit SSD1306‘. Writing Arduino Code For SSD1306 OLED DisplayĪdafruit provides example sketches that can help you get started. ![]() Arduino UNO and SSD1306 OLED display connection diagram In the case of Arduino Leonardo, the SDA pin is 2 & the SCL pin is 3. In the case of Arduino Mega 2560, the SDA pin is 20 & the SCL pin is 21. ![]() Note that in the case of other Arduino boards, the connections will change. Connection Diagram Of Arduino UNO & OLED DisplayĬonnect your Arduino to the OLED display as shown in the diagram below.
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