I have recently acquired a 10 IOs relay module ESP32 board, and I'm trying to use it with the standard Espressif development environment.
I would have liked to have the pins descriptions for IOs, RS485, Ethernet SPI and I2C, but did not find these in the documentation. So I had to discover the pins to use, mainly from the Arduino pins_is.h file.
What I did not find in this file is I2C pins settings. I think I found them on the board : GPIO22 for SDA and GPIO1 for SCL, but this configuration is really strange as GPIO1 is also used by main ESP32 board as TxD0.
Can you please clarify ?