Both I2C interfaces are connected to pins via GPIO matrix, so you can select arbitrary IO pins for SDA and SCL.  You just need to observe the constraints of each pin such as I/O capability (GPIO34 – 39 are input only so not suited!), bootstrapping function. Pull up resistors The ESP32 has internal pull up […]

REMEMBER NOT ALL ESP32 PINS ARE INPUT/OUTPUT – SOME ARE INPUT ONLY!!!! ESP32 Pin List All of the pin fucntions, default state, etc: https://www.espressif.com/sites/default/files/1a-esp32_pin_list_en-v0.1.pdf