Standard-Mode (Sm), with a bit rate up to 100 kbit/s.Ultra Fast-mode devices are not compatible with previous versions since the bus is unidirectional. This means any device may be operated at a lower bus speed category than its own. Standard-mode, Fast-mode (Fm), Fast-mode Plus (Fm+), and High-speed mode (Hs-mode) devices are downward-compatible. The I2C Bus has five operating speed categories. And it’s considered the most efficient serial communication bus in terms of the number of IO pins needed to establish a communication network of multiple devices.

Each device has a unique ID that others can use to directly address that specific device.

The I2C is a multi-master multi-slave protocol that supports a large number of devices on the same 2-wire bus. Hence the name, TWI ( Two- Wire Interface). It consists of 2 pins only (one for serial data and one for the serial clock).

I 2C, I2C, or IIC ( Inter- Integrated Circuit) is a very popular serial communication protocol that’s widely used by different sensors and modules in embedded systems.

Arduino I2C Example – I2C LCD 16×2 Interfacing.

I2C Communication Between Two Arduino Boards.

Arduino I2C Communication Configurations.

Without further ado, let’s get right into it! Table of Contents Arduino Basic: How to use the Arduino I2C Scanner?

Arduino two wire library