# MCP23x17 I/O Expander The `MCP23x17` I/O expander component allows the user to configure inputs, outputs, interrupts, etc. via a serial interface such as SPI or I2C. ## Example The [example](./example) shows how to communicate with an MCP23017 I2C digital I/O exapander using the `espp::Mcp23x17` component.
idf.py add-dependency "espp/mcp23x17^0.21.0"