PCF8574 I2C GPIO Expander Tutorial

Описание к видео PCF8574 I2C GPIO Expander Tutorial

Getting familiar with using the PCF8574 GPIO Expander with Arduino, including using it as outputs, inputs (polled and interrupt driven), addressing multiple devices on the same bus, and limitations on using this device.

Related: I2C bus expander    • TCA9548A I2C Multiplexer: Use Multipl...  
For when you have multiple devices with the same address or you want to use more modules than the bus allows because you run out of addresses. This allows switching different chains of devices onto the main I2C bus.

Arduino Sketch:
https://github.com/GadgetReboot/Ardui...

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