Required:
- Raspberry Pi running raspbian
- PCF8574 8-bit I2C I/O Expander
- 60 x Leds & Buttons
The first step is to enable i2c via raspi-config: sudo raspi-config, select advance menu, select i2c, then enable it.
Make sure you are upto date sudo apt-get update.
Next install smbus which will control the i2c, sudo apt-get install python3-smbus.