Dive into the world of AVR microcontrollers with this comprehensive first class in the "AVR: Architecture, Assembly & Reverse Engineering" series. Explore the Wokwi simulation environment, gain a solid understanding of bits and AVR memory spaces, and master direct port manipulation using GPIO registers. Learn to control LEDs through PORTD, read slide-switch states with PIND, and implement interrupts in Arduino. Conclude with an introduction to timers, setting the foundation for advanced microcontroller programming and reverse engineering techniques.