Journal
Practical writing on firmware, embedded systems, and building reliable IoT products. Same engineering rigor, just in long-form.
How three hours with a PUSR USR-G805 turned into a root shell, a full firmware dump, and a surprise connection to Shanghai.
A practical blueprint for reducing idle drain, waking predictably, and keeping ESP32 devices stable through noisy real-world deployments.
How to structure ingestion, storage, and visualization so your dashboard helps operators act, not just observe.
Patterns for bridging legacy protocols into MQTT without introducing silent failure points.