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fix: Preserve GPS satellites across DOP-only SKY messages

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gpsd sends multiple SKY messages per cycle — some contain only DOP
values with an empty satellites array. Previously this would overwrite
the satellite list, causing the sky view to flicker empty. Now DOP-only
SKY messages preserve the existing satellite list. Also adds a 5-second
polling fallback for satellite data since SSE can miss sky updates due
to queue contention.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-16 19:48:46 +00:00
parent 95046e0d20
commit 333c382ebd
2 changed files with 61 additions and 13 deletions
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utils/gps.py
+29 -13
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@@ -318,6 +318,8 @@ class GPSDClient:
except json.JSONDecodeError:
logger.debug(f"Invalid JSON from gpsd: {line[:50]}")
except Exception as parse_err:
logger.error(f"Error handling gpsd {msg_class} message: {parse_err}")
except socket.timeout:
continue
@@ -371,19 +373,33 @@ class GPSDClient:
self._update_position(position)
def _handle_sky(self, msg: dict) -> None:
"""Handle SKY (satellite sky view) message from gpsd."""
sats = []
for sat in msg.get('satellites', []):
prn = sat.get('PRN', 0)
gnssid = sat.get('gnssid')
sats.append(GPSSatellite(
prn=prn,
elevation=sat.get('el'),
azimuth=sat.get('az'),
snr=sat.get('ss'),
used=sat.get('used', False),
constellation=_classify_constellation(prn, gnssid),
))
"""Handle SKY (satellite sky view) message from gpsd.
gpsd sends multiple SKY messages per cycle: some contain only DOP
values while others include the full satellites array. When a
DOP-only SKY arrives, preserve the most recent satellite list
instead of overwriting it with an empty one.
"""
raw_sats = msg.get('satellites', [])
has_satellites = len(raw_sats) > 0
if has_satellites:
sats = []
for sat in raw_sats:
prn = sat.get('PRN', 0)
gnssid = sat.get('gnssid')
sats.append(GPSSatellite(
prn=prn,
elevation=sat.get('el'),
azimuth=sat.get('az'),
snr=sat.get('ss'),
used=sat.get('used', False),
constellation=_classify_constellation(prn, gnssid),
))
else:
# DOP-only SKY message — keep existing satellites
with self._lock:
sats = list(self._sky.satellites) if self._sky else []
sky_data = GPSSkyData(
satellites=sats,