Bohea Still

Demos

Nearly every proposal I write leaves behind a runnable demo, and win or lose, I sanitize it and publish it here. Everything below runs without credentials (with mock modes where needed), and each README states what was measured, which data is synthetic, and what the result does and doesn’t prove. The case studies go deep on a few projects; this page covers more ground.

Industrial

Annotated frame: the detector ignores the glare near the centre and locks onto the fainter real laser dot up-left
What the hard part looks like: the bright white blob near the centre is glare, and a brightest-pixel detector chases it. The real laser dot is the fainter one up and to the left, which is what this detector locks onto (green marker), reading the offset to sub-pixel precision. The image comes from running the repo on synthetic frames. It proves the method against synthetic ground truth; it isn’t field-validated footage.

  • Industrial Data · MQTT

    A Sparkplug B host that doesn’t kill live machines

    I couldn’t find a maintained open-source Python host application for Sparkplug B, so I wrote one. It matches death certificates by bdSeq rather than timestamp, treats a sequence gap as reordering before it panics, and rate-limits rebirth because one request makes a node retransmit everything. Fourteen scenarios, no broker, about a second. The README also documents four places the 3.0.0 spec contradicts itself.

    GitHub

  • Software ↔ Hardware · Safety

    Command a machine over MQTT, then try to break it

    Every command is classified by what could go wrong (UI-level, won’t move, damages the machine, hurts a person) and has to pass that class’s hard preconditions. Run break_it.py: eleven checks in about a second, nine attempts to make it misbehave and two that confirm an operator can still recover afterwards. Includes an operator HMI and a real MQTT bridge.

    GitHub

  • Software ↔ Hardware

    Short-range depth you can trust: filter, fuse, validate

    RealSense D405 short-range depth: a filter + fusion pipeline with a quantitative accuracy-validation harness. Runs on a synthetic benchmark; plugs into real .bag recordings.

    GitHub

  • Software ↔ Hardware

    Reading a laser point to sub-pixel millimetres

    A laser dot on a target becomes a live, glare-resistant, sub-pixel millimetre offset. A method demo for a camera-based levelling readout, using NumPy and OpenCV, with an honest synthetic benchmark.

    GitHub

  • Systems & Integration

    Silent printing for a browser ERP

    A local bridge that lets a browser-based ERP print PDFs silently to a chosen Windows printer. A zero-dependency Node service with a per-install token and an Origin allowlist. Runs in mock mode on any OS.

    GitHub

Software outside the factory

More runnable repositories, from AI pipelines to payments and routing, are shown in my lab at byteplain.com, so this page stays about machines.

These are capability demos, not client deliveries. Client work is in the case studies, anonymized where contracts require it. If one of these is close to your problem, it’s usually a short step from the demo to a scoped first milestone.