There is an IO expander PCA9534PW, Arduino UNO. I don’t really understand how I can manage this expander using UNO over I2C.
I found an example, but here is the reading mode.
What I need: Set the IO0 pin to exit mode, set the HIGH / LOW level to IO0.
In the datasheet, I just realized that to enter the settings mode - you need to write Wire.write(0x03). How can I do it?