M5Stack Extend I/O Unit (Grove)

File:TArduinoM5StackExtendIO.png

Summary

I2C-controlled GPIO expander with 8 channels, configurable as inputs or outputs with optional inversion.

Description

The **M5Stack Extend I/O Unit (Grove)** provides 8 GPIO channels accessible over I2C. Each channel can be configured as digital input or output, with optional inverted logic. This makes it suitable for controlling LEDs, buttons, or general-purpose digital I/O in microcontroller projects.

Diagram:

Categories

• File:TArduinoI2CCategory.png Category I2C – Components controlled via I2C bus.
• File:TArduinoDigitalCategory.png Category Digital – Components handling digital logic signals.

Properties

Channel Properties

Each channel (Channel[0] to Channel[7]) has the following properties:

• Auto Config – Automatically configure channel at startup.
• Initial Value – Default digital value (boolean).
• Is Output – Configure the channel as digital output (otherwise input).
• Is Inverted – Invert the logic of the channel.

Pins

Channel	Digital Input	Digital Output
Channel[0]	In (Digital)	Out
Channel[1]	In (Digital)	Out
Channel[2]	In (Digital)	Out
Channel[3]	In (Digital)	Out
Channel[4]	In (Digital)	Out
Channel[5]	In (Digital)	Out
Channel[6]	In (Digital)	Out
Channel[7]	In (Digital)	Out

I2C Pins

• I2C – I2C communication pins for controlling the Extend I/O Unit.