M5Stack Extend Serial I/O Unit PCA9554PW Port Expander

The EXT.IO by M5stack is a PCA9554PW port expander that allows you to expand your I/O. The port expander is controlled via the i2C interface and with it, you can gain an additional 8 I/O.

This EXT.IO UNIT communicates via the i2C interface, connect this unit to the GROVE PORTA on the M5Core or M5Stick. The I2C address is 0x27.

Download and Links:

• Quick Start Guide
• M5Stack Github Example Code Arduino
• M5Stack Github Example Code UiFlow
• Official M5Stack Forum

Technical Details:

• Chip: PCA9554PW
• Number of I/O: 8
• Suitable for logic level: 2.3 to 5.5 V
• Mounting: Two Lego compatible holes
• Connection connector: PH2.0 4 Pin
• Interface: Grove A
• Used Pin's: G21, G22 (SDA, SCL)
• I2C Address: 0x27
• Dimensions: 32 x 24 x 10.2mm
• Weight: 16.6g

Package includes:

• 1x M5Stack Extend Serial I/O Unit PCA9554PW Port expander
• 1x GROVE Cable 20cm
• 1x Storage Box