Dive into the first class of the Embedded Serial Buses series, focusing on I2C (Inter-Integrated Circuit) communication protocol. Explore the fundamentals of I2C, including its purpose, hardware components, and protocol-level details. Learn about SDA and SCL lines, bus schematics, the importance of pull-up resistors, and various speed options. Understand key concepts such as START and STOP conditions, bus arbitration, data transmission mechanics, and I2C addressing. Examine real-world examples through transactions and their visualization in PulseView. Gain essential knowledge for working with embedded systems and serial communication in this comprehensive 50-minute lecture.