Kayos
595c1cadf5
odc-api.db confirmed present on device. framekms table has: latitude, longitude, altitude, hdop, satellites_used, time NOT lat_deg/lon_deg/alt_m/num_satellites as previously assumed. Redis fallback retained, supports both field naming conventions. API response format unchanged (still returns lat_deg/lon_deg for Varroa compat).
87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
"""GPS data reader for adacam-api.
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Primary source: /data/recording/odc-api.db framekms table (confirmed schema from live device).
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Fallback: Redis (keys may appear when device has outdoor GPS fix post-liberation).
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Confirmed field names from live device:
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latitude, longitude, altitude, hdop, satellites_used, speed, heading, time
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"""
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import json
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import os
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import sqlite3
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import time
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ODC_DB = '/data/recording/odc-api.db'
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GNSS_REDIS_KEYS = ['GNSSFusion30Hz', 'GnssData', 'GnssPvt', 'GnssPosition']
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_redis_client = None
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def _get_redis():
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global _redis_client
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try:
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import redis
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if _redis_client is None:
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_redis_client = redis.Redis(host='localhost', port=6379, decode_responses=True)
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_redis_client.ping()
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return _redis_client
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except Exception:
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_redis_client = None
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return None
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def get_latest_gnss():
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"""Get latest GPS fix. Returns dict with keys: lat_deg, lon_deg, alt_m, hdop, num_satellites.
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Field names kept compatible with original API response format."""
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# Primary: SQLite framekms (confirmed live device schema)
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if os.path.exists(ODC_DB):
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try:
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conn = sqlite3.connect(ODC_DB)
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row = conn.execute(
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'SELECT latitude, longitude, altitude, hdop, satellites_used, time '
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'FROM framekms WHERE latitude IS NOT NULL AND latitude != 0 '
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'ORDER BY time DESC LIMIT 1'
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).fetchone()
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conn.close()
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if row:
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return {
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'lat_deg': row[0],
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'lon_deg': row[1],
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'alt_m': row[2],
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'hdop': row[3],
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'num_satellites': row[4],
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'unix_milliseconds': int(row[5]) if row[5] else int(time.time() * 1000),
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}
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except Exception:
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pass
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# Fallback: Redis (may appear post-liberation with outdoor GPS fix)
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r = _get_redis()
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if r:
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for key in GNSS_REDIS_KEYS:
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try:
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for getter in [lambda k: r.zrevrange(k, 0, 0), lambda k: [r.get(k)]]:
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items = getter(key)
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item = items[0] if items else None
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if item:
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data = json.loads(item)
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lat = data.get('latitude') or data.get('lat_deg')
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lon = data.get('longitude') or data.get('lon_deg')
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if lat and lon:
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return {
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'lat_deg': lat,
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'lon_deg': lon,
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'alt_m': data.get('altitude') or data.get('alt_m', 0),
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'hdop': data.get('hdop', 99),
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'num_satellites': data.get('satellites_used') or data.get('num_satellites', 0),
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'unix_milliseconds': int(data.get('unix_milliseconds', time.time() * 1000)),
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}
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except Exception:
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continue
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return None
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def has_gps_lock():
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"""Check if we have a valid GPS lock."""
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gnss = get_latest_gnss()
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return gnss is not None and gnss.get('num_satellites', 0) >= 4
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