Package Included

- 1 x PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module

Description:

- I2C interface, I / O expansion module, two I / O scalability 8 I / O (up to 8 simultaneous use the PCF8574 expanded to 64 I / O)
- Most important feature: 1. Supports two interface types access target board: Pin or row seat,
- Support I2C bus cascade (by pin header row seat docking methods can be used simultaneously multiple I2C modules)
- Typical application: I / O resource shortage MCU I / O expansion
- Main resources: the PCF8574 I2C interface, 8-bit parallel

Reference

• https://www.instructables.com/PCF8574-GPIO-Extender-With-Arduino-and-NodeMCU/
• https://www.youtube.com/watch?v=-CXSEWlMYFs