Review on 📺 MakerFocus 1.5inch OLED Display Module 128x128 Pixel SSD1327 - SPI/I2C Interface, 16-bit Grey Level - for Ar duino/Raspberry/Jetson Nano/STM32 - DC 3.3V / 5V by Ken Booker

These work well . The text is crisp and clear, which makes it surprisingly easy to read given the size. Three things to know: First, there are no pull-up resistors on the clock (SCL) and data (SDA) lines. There is a place on the back of the board for connecting 1/8 W resistors to the contact pads. Second, as others have pointed out, the default I2C address is 0x3C. Third, for me they only work with libraries that include SH1106 support. This includes the u8g2 library as well as a few others such as B. the SH1106 ports of earlier versions of the Adafruit SD3106 library you will find. To me, the Adafruit SD3106 library gave a display that appeared like the pixels were being misaddressed (rather than just misaligned). This can be processor dependent. I'm working with an Adafruit nrf52840 express which includes hardware I2C. The u8g2 library is reliable and works well. The library requires choosing a constructor appropriate to the board. For this board and my nrf52840 (hardware I2C) this display is U8G2_SH1106_128X64_NONAME_F_HW_I2C (U8G2_R1, /* reset=*/ U8X8_PIN_NONE);