I have been trying to determine which pins the OLED is using and was examining the schematic. I noticed that the SDA and SCL lines for the OLED were tied together with 10K resistors. If I look at the SSD1306 datasheet I can see it can use parallel, SPI, or I2C for communication but no mention of 1-wire. I still am trying to determine which physical pins on the board this OLED actually uses…
On the Wifi ESP32 v3 board, is the SSD1306 configured for i2c or 1Wire?
I think you’ll find that those are the pull-up resistors on the two I2C lines. Unfortunately, it would seem that the relevant pins have not been broken out on the board, a shortcoming IMHO. ‘Connectors’ for ‘pins’ 17 (SDA) and 18 (SCL) can, nonetheless, be found on the bottom of the board:
although it has been suggested that these are really just for testing purposes.