Stop Using Polling on MCUs | Event-Driven Architecture in Embedded Systems

Event-driven architecture in embedded systems is one of the most effective ways to build responsive, scalable, low-power, and maintainable firmware. This video explains how interrupts, event queues, dispatchers, handlers, RTOS tasks, and state machines work together in a practical embedded design. You will learn how event-driven firmware differs from polling and interrupt-only designs, why ISRs must remain short, how deferred processing improves reliability, and how events move from hardware sources into queues and application handlers. The video also covers event prioritization, queue overflow handling, latency budgeting, watchdog supervision, state machines, active objects, and RTOS communication mechanisms such as queues, task notifications, event groups, semaphores, and software timers. A practical smart sensor node example demonstrates the complete workflow: Sensor interrupt → ISR → Event queue → Worker task → Data processing → BLE transmission → Low-power mode Topics covered: • Event-driven architecture fundamentals • Polling vs interrupts vs event-driven design • ISR design and deferred processing • Event queues and dispatchers • State machines and active objects • RTOS queues, notifications, and event groups • Event priority and latency management • Queue overflow and fault recovery • Low-power embedded firmware • Smart sensor node implementation • Best practices and common pitfalls This video is useful for embedded software engineers, firmware developers, electronics engineers, STM32 developers, ESP32 developers, FreeRTOS users, and anyone designing reliable real-time embedded systems. #EmbeddedSystems #EventDrivenArchitecture #FreeRTOS