Zephyr

Beeper 1: Reverse Engineering a Hidden Command

Reverse engineering a Zephyr firmware to find a hidden XOR-obfuscated command in a Ph0wn CTF challenge

March 16, 2026 in Security by Gerboise5 minutes

A practical guide to setting up UART on custom pins with Zephyr and testing the communication using HydraBus

January 15, 2026 in Embedded by Gerboise4 minutes