I²C Communication Arduino -> PSoC

Hi,

in my current project I want to send a value from my Arduino UNO to my PSoC 4200.
I looked into some examples and videos but unfortunately I don't get it...

I suppose in my case the PSoC is the master, isn't it?
I want the received value to be stored in a variable.

For instance I send 0x01 from Arduino to the PSoC.
This value should be stored in a variable in PSoC so I can process it.

What is the easiest/beginner friendliest way to realize this?