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feat(ui-lvgl): GPS screen - sky plot, signal per satellite, fix details

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- Home > GPS and Settings > System > GPS details: satellites on a sky plot
  (filled = used in the fix, colour = C/N0), a bar per satellite with its
  dB-Hz, fix state with time to first fix, DOPs, position, altitude, speed,
  UTC and per-constellation counts; a Turn on button while GPS is off
- helpers/sensors/GpsSky.h parses GSV / GSA / GGA / RMC from any talker,
  fed from MicroNMEALocationProvider behind -D GPS_SKYVIEW (L2 and the
  sim only; L1 unchanged); the sim feeds it made-up NMEA
- Roadmap: GPS indoors diagnosed with it - on the USB cable the L76K
  tracks satellites but never decodes navigation data; on battery it
  gets UTC within seconds and a fix

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-09-26 21:50:48 +02:00
co-authored by Claude Opus 5.5
parent 690df304d7
commit 70921cd865
8 changed files with 666 additions and 4 deletions
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docs/development/l2-roadmap.md
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@@ -201,7 +201,19 @@ this roadmap is done; the Cardputer follows whatever the spike shows.
USB plugged in (0x40 reads 0x01). Needed for a charging indicator and
for skipping the low-battery shutdown on the cable. Find the right
chip / register (devices on the bus: 0x14, 0x18, 0x21, 0x22, 0x2c,
0x34, 0x48, 0x5d). Found 2026-09-26.
0x34, 0x48, 0x5d). Found 2026-09-26. Also wanted for a hint on the
GPS screen while on the cable (see below).
- [x] GPS screen (2026-09-26): Home > GPS and Settings > System > GPS
details -- sky plot, C/N0 bar per satellite, fix / TTFF / DOPs,
per-constellation counts (helpers/sensors/GpsSky.h, -D GPS_SKYVIEW;
the sim feeds it made-up NMEA).
- [x] GPS indoors (2026-09-26): diagnosed with the new GPS screen and raw
NMEA logs. On the USB cable (charging) the L76K tracks satellites at
25-35 dB-Hz but never decodes navigation data: no UTC in 10 min, no
fix in over an hour. On battery, same spot by the window: UTC within
seconds, first fix after 377 s. Screen, WiFi, Bluetooth and LoRa TX
were ruled out. Cause: noise from USB power / the charger -- a board
property, not fixable in firmware. Test GPS on battery.
Ideas to come back to (2026-09-26):