The PCF8574_LH library provides a simple interface for controlling the PCF8574 I/O expander using the I2C communication protocol. It allows you to read and write values to the PCF8574's registers, ...

This library gives easy control over the 8 pins of a PCF8574 and PCF8574A chip. These chips are identical in behaviour although there are two distinct address ranges. So you can connect up to 16 ...

A while ago I received a couple of I/O port expander modules that use the I 2 C protocol. Using that Chinese module, you can use only the SDA and SCL pins of your ...