Arduino UNO R4 WiFi and SparkFun Qwiic OLED Display help

Development Boards Arduino
1

Hello,

I am trying to get the SparkFun Qwiic OLED Display to work with a Arduino UNO R4 WiFi.

I am using the standard library called Sparkfun Qwiic OLED Graphics Library on Windows 11.

However, it doesn’t work, the screen is blank and in the serial console I see this error message:

Running OLED example

Device begin failed. Freezing…

https://www.sparkfun.com/products/22632

https://www.sparkfun.com/products/17153

tGNIYEb.jpeg4080×3072 2.11 MB
https://i.imgur.com/tGNIYEb.jpeg

This is the example code I use:

/*

  Example-01_Hello.ino

  This demo shows the basic setup of the OLED library, generating simple graphics and displaying
  the results on the target device.

   Micro OLED             https://www.sparkfun.com/products/14532
   Transparent OLED       https://www.sparkfun.com/products/15173
   "Narrow" OLED          https://www.sparkfun.com/products/17153

  Written by Kirk Benell @ SparkFun Electronics, March 2022

  Repository:
     https://github.com/sparkfun/SparkFun_Qwiic_OLED_Arduino_Library

  Documentation:
     https://sparkfun.github.io/SparkFun_Qwiic_OLED_Arduino_Library/

  SparkFun code, firmware, and software is released under the MIT License(http://opensource.org/licenses/MIT).
*/

#include <SparkFun_Qwiic_OLED.h> //http://librarymanager/All#SparkFun_Qwiic_Graphic_OLED

// The Library supports three different types of SparkFun boards. The demo uses the following
// defines to determine which device is being used. Uncomment the device being used for this demo.

QwiicMicroOLED myOLED;
// QwiicTransparentOLED myOLED;
// QwiicNarrowOLED myOLED;


void setup()
{
    Serial.begin(115200);
    Serial.println("Running OLED example");

    Wire.begin();

    // Initalize the OLED device and related graphics system
    if (myOLED.begin() == false)
    {
        Serial.println("Device begin failed. Freezing...");
        while (true)
            ;
    }
    Serial.println("Begin success");

    // Do a simple test - fill a rectangle on the screen and then print hello!

    // Fill a rectangle on the screen that has a 4 pixel board
    myOLED.rectangleFill(4, 4, myOLED.getWidth() - 8, myOLED.getHeight() - 8);

    String hello = "hello"; // our message

    // Center our message on the screen. Get the screen size of the "hello" string,
    // calling the getStringWidth() and getStringHeight() methods on the oled

    // starting x position - screen width minus string width  / 2
    int x0 = (myOLED.getWidth() - myOLED.getStringWidth(hello)) / 2;

    // starting y position - screen height minus string height / 2 
    int y0 = (myOLED.getHeight() - myOLED.getStringHeight(hello)) / 2;

    // Draw the text - color of black (0)
    myOLED.text(x0, y0, hello, 0);

    // There's nothing on the screen yet - Now send the graphics to the device
    myOLED.display();

    // That's it - HELLO!
}

void loop()
{
    delay(1000); // Do nothing
}
2

Note I have also tried in the code with the narrow active, like this:

QwiicNarrowOLED myOLED;

3

Is the problem that the SSD1306 doesn’t support the 5V from this Arduino?

4

The QWIIC connector on the UNO R4 WiFi is Wire1 and not the default Wire I2C interface.

You will need the Wire1.begin(); and then start your OLED display on Wire1.

This typically requires you to add the address and &Wire1 declarations with something like…

myOLED.begin(Address, Wire1);

You will need to find out what the address is and the library may require this in INT or HEX format.

And the TwoWire identifier may be &Wire1 or Wire1

5

andreasrosdal:
Is the problem that the SSD1306 doesn’t support the 5V from this Arduino?

The QWIIC connector on the UNO R4 WiFi has been shifted to 3.3v