03 / Notes

Notes from the underground

First-hand engineering case studies about C++ systems, embedded software, React Native iOS applications, application security, and the tradeoffs behind dependable products.

1. September 9, 2026

   EmbNode: testing telemetry before connecting hardware

   Packet framing, OTA failure handling, and power accounting in a C++17 telemetry prototype, with the limits of host testing made explicit.

   • C++17
   • FreeRTOS
   • Embedded systems
   • Telemetry
   • CRC16
   • Testing

2. September 9, 2026

   SysLib: ownership and waiting in two C++ queues

   How SysLib's SPSC ring publishes values with atomics, why its MPMC queue uses a mutex, and what the tests establish.

   • C++20
   • Concurrency
   • Atomics
   • SPSC
   • MPMC
   • Testing

3. August 28, 2026

   AI materials for Olympic, OFFO Living, and Technohome

   A permanent record of the four AI presentation PDFs published for Olympic, OFFO Living, and Technohome.

   • AI
   • Olympic
   • OFFO Living
   • Technohome
   • Public archive

4. July 27, 2026

   Building AURORA

   How AURORA combines manual caffeine logs, optional Apple Health sleep data, a vigilance test, and private on-device storage.

   • React Native
   • TypeScript
   • Swift
   • iOS
   • HealthKit
   • MMKV
   • On-device storage
   • Caffeine tracking
   • Vigilance testing