The I2C (Inter-Integrated Circuit) bus is a synchronous serial communication protocol that allows multiple electronic components (sensors, displays, memories, etc.) to be connected within the same ...

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This is a basic port of the liquid crystal arduino library for driving an LCD using the HD44780 driver and PC8574 I2C I/O expander. Please see main.c file for example usage.

The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I²C‑bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, ...