The Quick2Wire Port Expander board for the Raspberry Pi, gives you an extra 16 GPIO pins which can be used for digital input or output. You’ll find code in the Quick2Wire Library to drive it from Python, along with examples of use.
Each Port Extender board has a configurable address which is set using DIP switches. Eight addresses are possible, allowing eight boards to be connected to the I2C bus.
The Port Expander connects to our Raspberry Pi Interface Board through its I2C bus. The kit includes a connector cable.
The board is based on the MCP23017 chip.
Kit Includes all components including a GPIO ribbon cable to break out from the I2C bus
Provide an Extra 16 GPIO pins for digital Input or Output.