I'm fairly new to Arduino, I did a few basic projects. Now I'm trying to learn more about the PCF8574 I/O bus expander. I was able to connect 8 LED's and make them blink one at the time without to much trouble. But now I'm trying to read a button push and it's giving me a hard time for the past 2 days.
This is the way I've set up my project:
and this is the code I'm using:
#define DEVICE_ADDRESS 56
x = Wire.read();
If somebody could take a look and tell me what I'm doing wrong, that would be great!