You will dive into the UART driver, one of the most critical peripherals in the field.

You’ll configure the driver to transmit and receive data with precision, exploring both polling and interrupt-driven methods. You will gain a deep understanding of how to manage interrupts manually and how Zephyr leverages them internally to keep its drivers running smoothly.

You will explore the power of Zephyr’s logging system, using Segger RTT and Ozone for high-level debugging.

From there, you’ll take control of the build system. You will navigate project manifests and workspace structures, learning how CMake manages the build phases and how to resolve complex configuration issues like a pro.

You will dive into the heart of the operating system. You will learn to architect multi-threaded applications by defining threads and fine-tuning their priority, stack size, and flags. You’ll be a pro in the Zephyr kernel, learning to manage time-slicing, preemption, and cooperative scheduling to build a perfectly tuned, responsive system.

A robust program is a symphony of tasks, and you will learn how to make them communicate flawlessly. You’ll master Zephyr’s IPC mechanisms, including Queues, FIFOs, and Message Queues. To ensure your system remains predictable and safe, you will implement synchronization techniques using Mutexes and Semaphores, effectively eliminating race conditions in shared resources.

You will learn to offload heavy processing from interrupt contexts using Work Queues, allowing your system to handle time-based events with peak efficiency. You’ll also unlock Zbus, a high-performance communication framework. You will master its channels and observers, learning exactly when to apply its four different listening modes to simplify many-to-many communication patterns.

This week, you’ll focus on high-level sensor integration. You will start by reading raw analog signals through the ADC driver before moving up to Zephyr’s Generic Sensor Interface. This transition will teach you the vital distinction between low-level peripheral access and standardized, scalable driver abstractions.

You will learn to configure the I2C bus to interface with external sensors and peripherals. Beyond standard communication, you will explore RTIO (Real-Time I/O), Zephyr’s modern framework for asynchronous, high-performance I/O operations. This is where you learn to handle data at scale without blocking your system.

You’ll start by using the high-speed SPI protocol, then take your sensor skills to the next level. You will examine the cutting-edge RTIO-based sensor interface, enabling you to perform asynchronous data acquisition that is faster and more efficient than traditional methods.

This is the milestone where you build your own device driver from the ground up using the Zephyr Driver Model. Starting with a foundational LED driver, you will master DeviceTree bindings, initialization macros, and API definitions. You’ll then scale that knowledge to develop a fully integrated driver for an external sensor. By the end of the week, you will tie together DeviceTree, Kconfig, and CMake to create fully integrated, professional-grade drivers.

This week is dedicated entirely to custom hardware. You will learn the internal architecture of Zephyr boards and how to organize hardware descriptions. By the end of the week, you will have defined a fully functional custom board from scratch, ready to be built, configured, and maintained just like an official Zephyr target.

In this closing week, you’ll analyze the startup sequence. You will see exactly where drivers initialize and what happens before that first thread even runs. As you wrap up your journey, you’ll learn how to contribute back to the Zephyr Project, turning your new expertise into a lasting impact on the global open-source community.