56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
# Copyright 2021-2022 Teemu Ikonen
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# SPDX-License-Identifier: GPL-3.0-only
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import re
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from datetime import datetime, timezone
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from .util import (
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datetime_from_gpstime,
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gps_epoch,
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gpstime_from_datetime,
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)
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def get_constellations(source):
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i2constellations = {
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0: [],
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1: ["Glonass", "BeiDou", "Galileo"],
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2: ["Glonass", "BeiDou"],
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3: ["Glonass", "Galileo"],
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4: ["Glonass"],
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5: ["BeiDou", "Galileo"],
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6: ["Galileo"],
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}
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try:
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r = source.modem.Command('AT+QGPSCFG="gnssconfig"', 3)
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mo = re.match(r'\+QGPSCFG: "gnssconfig",(?P<ind>\d)', r)
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except Exception:
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mo = None
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if not mo:
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return None
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return ["GPS"] + i2constellations.get(int(mo.group('ind')))
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def get_xtradata_dates(source, fix_week=False):
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try:
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r = source.modem.Command('AT+QGPSXTRADATA?', 3)
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# Example reply: '+QGPSXTRADATA: 10080,"2002/01/18,12:00:00"'
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mo = re.match(
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r'\+QGPSXTRADATA: (?P<duration>\d+),"(?P<time>[^"]+)"', r)
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except Exception:
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mo = None
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if not mo:
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return None
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dur_min = int(mo.group('duration'))
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datestr = mo.group('time').replace('/', '-').replace(',', 'T')
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startdt = datetime.fromisoformat(datestr + "+00:00")
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if fix_week and startdt > gps_epoch:
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week, ms = gpstime_from_datetime(startdt)
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startdt = datetime_from_gpstime(week, ms, fix_week=True)
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enddt = datetime.fromtimestamp(startdt.timestamp() + dur_min * 60,
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timezone.utc)
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return startdt, enddt
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