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feat: add dev mode toggle and screen off burn-in protection#385

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mrosseel wants to merge 304 commits into
brickbots:mainfrom
mrosseel:screensaver
Open

feat: add dev mode toggle and screen off burn-in protection#385
mrosseel wants to merge 304 commits into
brickbots:mainfrom
mrosseel:screensaver

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Summary

  • Press square 7 times anywhere to toggle dev mode (shows popup feedback)
  • Dev mode unlocks "Screen Off" option in Status menu and unstable software channel
  • Screen off blanks display and LEDs after configurable timeout (burn-in protection)
  • Hourly LED heartbeat pulse while screen is off
  • Test mode now shows popup "Test Mode ON/OFF" and uses hollow camera icon

Test plan

  • Press square 7x → see "DEV MODE ON" popup
  • Go to Status → "Screen Off" option visible
  • Set sleep_timeout="10s", screen_off_timeout="30s"
  • Wait 10s → screen dims (sleep)
  • Wait 30s more → screen blanks, LEDs off
  • Press any key → full wake
  • Press square 7x → "DEV MODE OFF", Screen Off hidden

🤖 Generated with Claude Code

mrosseel and others added 30 commits February 9, 2026 23:46
The rootfs contains root-owned files and lost+found directories that
require elevated permissions to access.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Remove any existing tarball, staging dir, and mount points before
starting to avoid permission issues from previous failed runs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Port manifest/channel infrastructure from migration branch:
- _parse_version with pre-release support
- _fetch_manifest / _fetch_version_txt with fallback
- _filter_upgrades, _available_channels
- Multi-phase menu: channel → version → action
- UIReleaseNotes with _strip_markdown
- Full test suite for version parsing, filtering, markdown

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
shell.nix provides Python 3.9 + native build deps (linuxHeaders,
gcc, SDL2, etc.) with LD_LIBRARY_PATH for scipy/numpy.
.envrc auto-creates venv and installs requirements via direnv.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace runtime camera selection (config.txt dtoverlay) with
build-time device tree overlays and NixOS specialisations.
All three camera variants (imx462, imx296, imx477) are pre-built;
switching is instant via `switch-to-configuration boot` + reboot.

- Remove runtimeCameraSelection option, always bake overlay into DT
- Change default camera from imx296 to imx462
- Add specialisations to SD image (imx296, imx477) and netboot (imx296, imx462)
- Add pifinder-switch-camera wrapper script and sudoers entry
- Preserve camera choice across upgrades via /var/lib/pifinder/camera-type
- Delete Debian sys_utils.py, rename sys_utils_nixos.py to sys_utils.py
- Simplify utils.py get_sys_utils() (no more /etc/NIXOS check)
- Delegate callbacks.py get_camera_type() to sys_utils
- Deploy script: use FDTDIR in extlinux.conf, remove dtoverlay from config.txt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The pifinder systemd service has a restricted PATH that doesn't
include sudo. Use /run/current-system/sw/bin/sudo for all calls.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
These commands are called outside of sudo (which has secure_path),
so they need full paths in the restricted pifinder service PATH.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Bump nixpkgs input to nixos-25.11
- Update Python 3.12 → 3.13 across all references
- Switch simplejpeg wheel to cp313
- Add explicit pyproject/build-system to 13 packages (required by 25.11)
- Add dontCheckRuntimeDeps for packages with env-level deps
- Rename hardware.pulseaudio → services.pulseaudio

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- u-boot SD image: use custom ubootSD with CONFIG_CMD_SYSBOOT,
  hardcoded load address, correct partition (0:2)
- RPi.GPIO: patch cpuinfo.c for aarch64 where /proc/cpuinfo lacks
  Hardware line and u-boot replaces firmware DTB
- I2C1: add overlay to fdtoverlay chain (nixos-hardware was bypassed)
- sudo: substituteInPlace pifinder-src to use /run/wrappers/bin/sudo
- polkit: add reboot/shutdown D-Bus rules for pifinder user
- /boot: mount firmware at /boot/firmware so extlinux.conf works

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- u-boot: disable PCI/USB/NET probing (CONFIG_PREBOOT="", CONFIG_PCI=n,
  CONFIG_USB=n, etc.) — eliminates ~3-4s of unnecessary hardware scanning
- boot-splash: move earlier with DefaultDependencies=false, poll for SPI
  device instead of relying on systemd restart
- Disable NetworkManager-wait-online (7.1s savings, NM still works async)
- pwm-permissions: no longer blocks pifinder startup (runs in parallel)
- pifinder-src: pre-compile .pyc bytecode at build time

Net result: splash ~7s (was 21s), menu ~45s (was 65s).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add bashInteractive to systemPackages (mkForce strips default bash)
- Add download-buffer-size 512MB for large PiFinder repo tarball
- Fix migration_progress OLED binary args to match expected format
  (<percent> <stage_num> <stage_total> <stage_name>)
- Fix nixos-rebuild progress: count copying/building lines instead of
  parsing non-existent (N/M) format

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Unified Python dev shell: extract python-packages.nix as single
  source of truth for both Pi production and x86 dev environments,
  add flake devShell, replace old shell.nix + pip venv with `use flake`
- Pygame keyboard capture: monkey-patch luma's _abort to intercept
  pygame KEYDOWN events, fixing arrow keys on Wayland where
  PyHotKey/pynput cannot access keyboard
- Cedar detect: build from source instead of shipping prebuilt
  binaries, add Cargo.lock for reproducible builds
- Software update UI: channel-based browsing (stable/beta/unstable),
  scrolling text for long labels, 7x square secret to unlock unstable
  channel, always show channels even when empty
- Fix pre-commit hooks: replace nox/virtualenv with direct devShell
  tool invocation, fix mypy config for nix environment
- Fix numpy.math removal in tetra3 (Python 3.13 compat)
- Various Python 3.13 compatibility fixes across codebase

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Fix test mode images: drain debug commands before blocking capture()
  so mode switch is processed even when camera hardware is unresponsive
- Fix PAM errors: create dedicated pifinder PAM service (auth-only,
  no session/account management that requires setuid)
- Fix service PATH: add /run/wrappers/bin and /run/current-system/sw/bin
  to pifinder systemd service path (camera switch, sudo, systemctl)
- Fix AP networking: enable firewall ports 53/67 UDP (DNS/DHCP) and
  80 TCP (web UI), add dnsmasq for NM shared mode, AP autoconnect
- Fix tetra3 rev pin: update to cded265 (np.math.factorial fix)
- Remove bootstrap workflow (no longer used)
- Remove absolute paths from sys_utils.py (service PATH handles resolution)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Fetch catalog_images.tar.zst from files.miker.be during SD image build,
unpack at build time, and copy writable into the root filesystem.
Not included in the regular system closure (no Cachix bloat).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Split pifinder-src into stable astro-data (~193MB) derivation + code
  (~57MB) for smaller OTA updates
- Add bootstrapMode option: minimal NixOS without pifinder-src, runs
  nixos-rebuild on first boot for migration from Raspbian
- Custom tarball builder (replaces make-system-tarball.nix) to avoid
  nix sandbox symlink conflict during closure copy
- Bootstrap tarball: 648MB with boot firmware, nix closure, extlinux
- Conditionally disable pifinder/cedar/watchdog services in bootstrap

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Migration tarball is now a complete v2.5.0 system — no two-stage
first-boot rebuild needed. Users get a working PiFinder immediately
after migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
images/ was fully stripped but console.py and splash.py load
images/welcome.png on startup. Keep that file, strip the rest.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
After migration from Raspbian, the tarball includes /nix-path-registration
with Nix store path data. This oneshot service loads it into the Nix DB
on first boot so nix-store and nixos-rebuild work correctly.

Uses ConditionPathExists so it's a no-op on normal boots.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace nixos-rebuild with direct nix store path deployment:
- CI builds push to Cachix and stamp pifinder-build.json per branch
- Upgrade service uses nix copy + switch-to-configuration (no OOM)
- Software UI resolves store paths from per-branch build metadata
- Delete versions.json (replaced by pifinder-build.json)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
nix copy --from uses only the specified source store. If Cachix
doesn't have every transitive dependency (e.g. shadow from nixos
cache), the copy fails. nix build with --max-jobs 0 uses all
configured substituters (Cachix + cache.nixos.org) as fallbacks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Rename nox.yml to lint.yml, use nix develop for ruff/mypy/pytest
- Move ruff builtins config into pyproject.toml, target py313
- Add notebook lint exclusions (E402, F841)
- Fix ambiguous variable name in software.py (l -> lbl)
- Remove unused import in sys_utils.py
- Delete noxfile.py, requirements.txt, requirements_dev.txt
- Add DEPENDENCIES.md (auto-generated from nix) and generation script
- Update .pre-commit-config.yaml with ruff lint+format hooks

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
native-wait job polls build-native for 15 min on ubuntu-latest.
If the self-hosted aarch64 runner doesn't pick up the job in time,
build-emulated kicks in with QEMU instead of queuing forever.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add openFirewall = true to samba service
- Remove manual port 22 (openssh.openFirewall defaults to true)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
During cold start the receiver reports an estimated C/N0 for
almanac-predicted satellites it is still trying to confirm, so a
cno > 0 filter makes the seen count start around 20+ and sink to the
real value as candidates fail to confirm. Gate on the quality
indicator instead: only code-locked signals (quality >= 4) count as
seen, in both NAV-SVINFO and NAV-SAT.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NrdGJ1s3jmA9qzV8HAsdZs
@mrosseel mrosseel force-pushed the screensaver branch 4 times, most recently from 8de2bc0 to 2796a8c Compare July 6, 2026 14:14
Gating the seen count on quality >= 4 (code locked) made the display
flap to zero during marginal re-acquisition — walking out to sky view
showed 0-3 satellites bouncing instead of the steady climb to a lock.
Satellites at quality 2-3 (signal acquired) have a real signal and
belong in the count; only quality-1 search candidates, whose C/N0 is
an estimate, still don't. Same threshold for NAV-SVINFO and NAV-SAT.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NrdGJ1s3jmA9qzV8HAsdZs
mrosseel and others added 4 commits July 10, 2026 14:12
Integrates brickbots/main (through brickbots#523) into the nixos branch.

Conflict resolutions:
- gps_ubx_parser.py / test_gps_ubx_parser.py: both branches carry the
  UBX NAV-SVINFO/NAV-SAT decoding fix (upstream brickbots#524). Kept nixos's
  later refinement that counts satellites at quality >= 2 (signal
  acquired) instead of >= 4 (code locked), which stopped the seen count
  flapping to zero during marginal re-acquisition.
- ui/software.py: both branches independently built manifest-driven
  update logic. Kept nixos's _fetch_update_manifest (channels dict via
  _entry_from_manifest) as the single source and adapted upstream's
  _migration_version_info_from_manifest to consume it; threaded
  migration_url/migration_sha256_url through _entry_from_manifest so the
  migration-tarball selection still works. Both features retained.
- test_software.py: unioned both suites; dropped upstream's obsolete
  TestFetchUpdateManifest (tested the removed raw-dict signature) and
  reshaped the migration fixtures to mirror real manifest entries.
- nixos_migration.sh / nixos_migration_init.sh: took upstream's version.
  nixos deliberately dropped its Raspbian-side copies (brickbots#521); the
  canonical pre-migration implementation lives on main.
The update manifest marked a build available: true whenever store_path
merely looked like a valid Nix store path, never checking the binary
cache. A build whose attic push failed (or was GC'd) was still advertised,
so a device selecting it hit 'no substituter can build it' and stranded
the upgrade.

set_available now probes each cache's narinfo and only advertises a build
when one actually serves the closure; otherwise available: false with
reason 'not in cache' / 'cache unreachable' (the UI already blocks these).
Defaults to the dev + release caches, so the gate is active without any
workflow change. --skip-cache-check retained for offline/tests.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
PiFinder's imx462 module has a 74.25 MHz oscillator; on Raspbian the
imx290 overlay parameter clock-frequency=74250000 sets this, but
fdtoverlay cannot apply overlay parameters, so the NixOS DTB kept the
37.125 MHz default — wrong INCKSEL/PLL programming, sensor enumerates
but never streams ("Camera frontend has timed out"). Apply a compiled
override overlay (cam1_clk + sensor node) after the camera overlay.

No kernel change: nixos-hardware's raspberry-pi-4 module already pins
the RPi vendor kernel (stable_20250916), whose imx290 driver carries
imx462 support. ADR 0008 rewritten accordingly.
mrosseel and others added 17 commits July 12, 2026 02:17
The nixos branch replaced nox + requirements*.txt with uv, but an
upstream merge kept .github/workflows/nox.yml while dropping
python/noxfile.py, so the nox check failed on every nixos-line PR
("Failed to load Noxfile"). Rewrite the workflow to run the same
checks through uv (ruff pinned to 0.4.8 like upstream's noxfile, mypy,
pytest smoke/unit/ui), keeping the "nox" check name.

Fix what crept in while CI was dead:
- ObservationsDatabase resolved utils.observations_db as an import-time
  default argument, so the UI-harness sandbox patch never applied — on a
  runner without ~/PiFinder_data every UI test died with "unable to
  open database file". Resolve the path at call time.
- UIMigrationConfirm/UIMigrationProgress documented in _COVERAGE_SKIP:
  smoke-driving them risks starting a real migration download.
- UBXParser.reader also accepts the aiofiles reader from_file passes;
  software.py declares the gettext-installed _ for mypy.

Update CLAUDE.md dev commands (uv, no tetra3 submodule).
…doers rule matches

The PiFinder-Type (screen_direction) menu and other restart paths call
sys_utils.restart_pifinder(), which ran "sudo systemctl restart
pifinder". The NixOS sudoers rule allows exactly "systemctl restart
pifinder.service" — sudo matches arguments verbatim, so the restart was
refused and silently never happened: the UI showed "Restarting..." but
the old process kept running. Net effect: switching PiFinder Type
right→left left the integrator dead-reckoning with the old IMU geometry
(reversed left/right motion) until a manual reboot.

Use the full unit name (matches every other systemctl call in the
codebase), pass -n so a denied sudo fails instead of hanging on a
password prompt, and log a restart failure instead of swallowing it.
New shell.nix + flake devShell for aarch64-linux; .envrc runs it via
direnv; nixos-pr-build and release workflows build and push the dev shell
closure to Attic; dev_guide documents the on-device dev environment.
DisplayPygame_128/_320 installed _patch_pygame_keyboard, which replaced luma's
_abort with a version calling pygame.event.get() every render frame. But
set_keyboard_queue was never called, so _keyboard_queue stayed None and those
KEYDOWNs were drained from the SDL queue and discarded -- racing the wired
main.py event poll (ADR 0004) and losing ~29 of every 30 keypresses in the
pygame emulator. Remove the dead mechanism (_patch_pygame_keyboard,
_build_key_map, _PYGAME_KEY_MAP, set_keyboard_queue) so luma's non-draining
_abort runs and main.py's poll is the sole SDL event consumer.
git and rsync were added to environment.systemPackages unconditionally for
on-device development (clone/pull/rsync a checkout). They are not used by the
NixOS image updater (manifest/store-path, ADR 0003), so keep them out of the
production image by gating on pifinder.devMode -- available on dev/netboot
builds, absent from production.
The BCM2711 hardware I2C block corrupts transfers when a slave stretches
the clock — the BNO055 does so routinely. The 10 kHz &i2c1 workaround
only lowered the odds (an errno-121 NACK still killed the IMU process on
pifinder-mr2) while making every IMU transaction ~10x slower than 100 kHz.

- hardware.nix: replace the 10 kHz &i2c1 overlay with a bit-banged
  i2c-gpio bus on GPIO2/3 (implements clock stretching per spec,
  ~60-100 kHz effective); disable &i2c1; drop the i2cFrequency option.
- PiFinder/i2c_bus.py (new): get_i2c() hands out the i2c-gpio adapter
  when the device tree provides one (sysfs discovery), else the default
  hardware bus — no board-model sniffing, boot config is the single
  source of truth.
- imu_pi.py: survive transient bus errors in the monitor loop (skip the
  sample, retry); re-create Imu() after ~2 s of consecutive errors to
  restore IMUPLUS mode after a sensor power glitch.
- hardware_detect.py, battery_bq25895.py: route through get_i2c() so
  the rev-4 charger probe and battery telemetry follow the same bus.
- deps: adafruit-extended-bus (ExtendedI2C on an arbitrary /dev/i2c-N).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UNCZgdNkUKk6Wzv42b11zq
cedar-detect-server caches its shared-memory file descriptor across
requests and only re-opens when a request sets reopen_shmem. Our
extract_centroids override never set it, so after a pifinder restart the
new solver's segment (same name, new inode) was never opened: the server
kept reading the PREVIOUS solver generation's segment — held alive by
its cached fd after unlink — and silently centroided that dead process's
last frame. Result: cedar returns success with 0 centroids on every
frame, killing all plate solving with no error logged anywhere.

- extract_centroids: pass reopen_shmem; _alloc_shmem override reports a
  freshly created segment (first request of each client) so the server
  re-opens the current segment. Verified on-device across two client
  generations with distinct images: gen2 reads its own image via shmem.
- log the previously silent shmem->inline fallback on INTERNAL errors.

The client/server pin mismatch initially suspected was a red herring:
the protos are wire-identical; the bug is the missing reopen handshake.
The proper fix belongs server-side (open the segment per request instead
of caching the fd); candidate for upstreaming to smroid/cedar-detect.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UNCZgdNkUKk6Wzv42b11zq
The Software Update screen read /var/lib/pifinder/current-build.json
verbatim. That file is written before the reboot (nixos_upgrade), so a
failed boot, manual rollback, or watchdog revert leaves it naming a build
that isn't running — the menu then shows a hash the device is not on.

Validate the recorded identity against /run/current-system (the booted
system's own toplevel, which cannot lie), handling camera specialisations,
and fall back to the running build's hash when the file is stale.
dev_mode_only was declared on the Screen Off menu item but never read by
any menu filter, so it had no effect. Remove it; Screen Off stays under
Tools > Experimental > Dev Tools next to Telemetry. Dev mode keeps its one
real effect (the 7x SQUARE gesture unlocking the Unstable update channel).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RjeCZ17KqhKzhKikWGwBDo
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