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  • Moving a TwinCAT 3 machine from Windows to TwinCAT/BSD
    2026-10-19 · twincat, tcbsd, beckhoff, plc, ethercat, freebsd, cnc
    Field notes from moving a large-format 3D printer (TwinCAT 3 NCI, EtherCAT servos) from the Windows runtime to TwinCAT/BSD on the same industrial PC: engineering version, a corrupted drive startup command, a drive moved to the wrong sync unit, Windows-only calls in the PLC code, and lost persistent positions.
  • TuyaBeGone: a free firmware for a cheap LSC camera, without the vendor libraries
    2026-10-19 · camera, anyka, buildroot, onvif, rtsp, reverse-engineering, unifi-protect, embedded-linux
    Replacing the cloud firmware of an LSC (HT-IPC280, Anyka AK3918AV130) camera with a Buildroot system: video and audio through the kernel drivers only (vendor libraries traced with LD_PRELOAD and rewritten), RTSP and ONVIF with motion events, AAC audio for UniFi Protect, a two-stage SD-card install that keeps the factory sensor calibration, and setup gated by the physical reset button.
  • A stateless air-circulation loop in Home Assistant (and why the AC stayed off)
    2026-10-12 · home-assistant, co2, voc, sen66, zigbee, automation
    Why a smart plug stayed off after a power cut (power-on state), and how we drive a fan from CO2 and VOC with Home Assistant helpers recomputed every minute: one helper per pollutant with its own hysteresis, an OR helper, and an actuator that follows it.
  • Heating load from a whole-house power meter: measure, model, forecast and colour it in Home Assistant
    2026-10-12 · home-assistant, heating, energy, forecast, card-mod, lovelace
    Using a 5-second whole-house power reading to find a convector's real power, the room's heat loss (about 105 W/K) and its base load, then turning weather forecasts into a heating-load percentage in Home Assistant, with icons coloured by whether the setpoint can be held. Includes a card-mod 4.2 glance gotcha.
  • Our network map learns Wi-Fi and Zigbee, and notices moved cables
    2026-10-12 · inventory, network, zigbee, wifi, php, home-assistant
    Additions to our in-house inventory and network map (PHP + PostgreSQL): detecting a machine replugged on another port from switch MAC tables, Wi-Fi and Zigbee collectors (a 3Com AP that ejects your session, a minimal PHP websocket client for Home Assistant ZHA), radio groups on the map, dark mode, and a switch that forgot its settings after a power cut.
  • mutter never forgets an unplugged GPU (and what it does to VR)
    2026-09-28 · mutter, gnome, wayland, drm-lease, evdi, vr, monado
    mutter never removes hot-unplugged GPUs: stale wp_drm_lease_device_v1 globals, Xwayland keeps the drm_fd, DRM minors leak up to card63, evdi cards, SteamVR and Monado DRM lease hangs; untested mutter RFC patch and tested Monado patch (XRT_COMPOSITOR_WAYLAND_DRM_NODE).
  • Playing on the GPU box from the desk, without a video codec (sRemFB)
    2026-09-28 · sremfb, evdi, latency, pipewire, uinput, gnome
    sRemFB windowed viewer sremfb-view (SDL3): EVDI virtual display, RAW/LZ4 damage rectangles over TCP, no H.264; keyboard, mouse and Xbox 360 gamepad over uinput; PipeWire audio as PCM over UDP; 8.7 ms key-to-pixel on 2.5 GbE; DROP_MASTER fix.
  • Small notes: Debian 13 + RDNA4 + Index
    2026-09-28 · debian, rdna4, amdgpu, steam, valve-index, notes
    Debian 13 trixie-backports kernel/Mesa/firmware for RDNA4, missing display-manager.service, initramfs udev hook copying .link files recursively, evdi 1.15.1 on kernel 7.1, Proton CompatToolMapping, appmanifest StateFlags 1026, Index camera over UVC/V4L2.
  • SteamVR on Linux: overlay/UI judder on RDNA4, and why Monado fixes it
    2026-09-28 · vr, steamvr, monado, amdgpu, rdna4, linux
    SteamVR without async reprojection on Linux; enableLinuxVulkanAsync and 120 Hz end in amdgpu flip_done timed out and a watchdog abort; Monado with steamvr_lh, xrizer and WayVR runs at 90/120/144 Hz; XRT_COMPOSITOR_DESIRED_MODE, XRT_NO_STDIN, lighthouse base stations, Index audio over DisplayPort.