Hi.
You can use other combination of pins, but you need to choose certain combinations.
See this section about I2C in our pinout guide: https://randomnerdtutorials.com/raspberry-pi-pico-w-pinout-gpios/#i2c

After choosing the pins:

In the setup(), you need to start an I2C communication using GPIO x and GPIO y. So, you need to add the following line:

Wire.begin(x, y);

After that, initialize the display with the following parameters:

if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C, false, false)) {
The parameters set as false ensure that the library doesn’t use the default I2C pins and use the pins defined in the code.

I think this should work but I haven’t tested it.

Regards,
Sara

Hi.
What do you mean?
Regards,
Sara

is it possible to change the default I2C adress of the pico?

thank you

Great.
I’m glad everything is working as expected.
Regards,
Sara

Thank you for your response. I did the entire installation procedure again. When installing the boards I was immediately given an update option. After doing this, all programs worked as before and the error messages disappeared.
I have no idea what went wrong before, but it works again./
Thank you for your patience.

Weird….
I’m not sure what might be causing the issue.
You said it worked before… I really don’t know what might have caused the issue…

Regards,
Sara

I installed the pico according to https://randomnerdtutorials.com/programming-raspberry-pi-pico-w-arduino-ide/ After that everything worked fine. . Also the OLED sketch. But now that I want to soak it again, I received the aforementioned error message. I haven’t changed anything in settings, etc.

Hi.
Did you install the Raspberry Pi Pico on the Arduino IDE?
Which version of the pico boards do you have installed?

Regards,
Sara

C:\Users\dell\Documents\Arduino\libraries\Adafruit_SSD1306\Adafruit_SSD1306.cpp:42:10: fatal error: pgmspace.h: No such file or directory
#include <pgmspace.h>
^~~~~~~~~~~~

Can you help me ?