M5Stack Extend Serial I/O Unit (PCA9554PW)

• M5Stack Extend Serial I/O Unit (PCA9554PW)
• Offers a GPIO Expander
• Comes with two Lego-compatible holes
• Provides eight expanded I/O number
• Interface: GROVE
• Support UIFlow and Arduino

The M5Stack Extend Serial I/O Unit (PCA9554PW) is a GPIO Expander. With simple I2C commands, it’s possible to extend the GPIO pins for up to 8 extra GPIOs.

The EXT.IO Integrates the PCA9554PW chipset. This 8-bit I/O expander for the two-line bi-directional-bus (I2C) is designed for 2.3-V to 5.5 V VCC with Open-Drain Active-Low Interrupt Output operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface.