[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_28":-5,"_38":-5,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48,"_49":50,"_51":52,"_53":54,"_55":56,"_57":58},"routes/_store+/_readers+/email_author.$slug/route",{"_9":10,"_11":-5},"book",{"_12":13,"_14":15,"_16":17,"_18":19,"_20":21,"_22":23},"currentUser","id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvNzkxNjM","title","Embedded Firmware with Zephyr RTOS","state","published","contactAuthorMethod","email","aboutText","

Embedded Firmware with Zephyr RTOS is a hands-on, 24-day guide for engineers who want to build real firmware on the nRF52840 — not just blink an LED, but ship production-ready code.

Each day introduces one concept, one working example, and one buildable project. You start with the Zephyr build system and Device Tree basics, then progress through threads, GPIO interrupts, USB communication, CBOR encoding, and BLE advertising. By the end, you will have written a custom I2C accelerometer driver, streamed live sensor data to a PC over USB, defined your own PCB board target, and put the processor into sub-µA sleep — the same techniques used in commercial wearables and IoT products.

What's inside:

24 structured lessons with working Zephyr source code for every day
Custom driver development for sensors not supported by upstream Zephyr
USB CDC-ACM, CBOR encoding, and a Python decoder tool for live data visualization
BLE peripheral advertising, SPI flash, ADC, PWM, NVS storage, and power management
A complete custom PCB board definition — ready to adapt to your own hardware
Setup guide covering Zephyr 4.x, West, and SDK 1.0.1 on Linux

Who this is for: Embedded engineers with C experience who are new to Zephyr, developers moving from bare-metal or Arduino to an RTOS, and hardware engineers writing firmware for their own nRF52840-based designs.

Hardware required: Nordic nRF52840 DK and a USB cable.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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