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Field notes.

Notes on embedded systems, open source and the Zephyr RTOS.

fig. 01 / featureddemo

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Zephyr on the Nokia N900

A 2009 phone, a signed bootloader that cannot be replaced, no serial cable and a webcam pointed at the screen: how Zephyr went from a question to a working phone with a touchscreen, camera, sound and its own drivers.

Anas NashifOct 13, 2026 · 46 min read

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