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cope with bogus NMEA gps

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This commit is contained in:
Kevin Hester 2021-01-16 11:41:18 +08:00
parent f110225173
commit 4faff3ec6f
1 changed files with 12 additions and 4 deletions
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16
src/gps/NMEAGPS.cpp
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@ -47,6 +47,8 @@ The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of s
t.tm_mon = d.month() - 1; t.tm_mon = d.month() - 1;
t.tm_year = d.year() - 1900; t.tm_year = d.year() - 1900;
t.tm_isdst = false; t.tm_isdst = false;
DEBUG_MSG("NMEA GPS time %d\n", t.tm_sec);
perhapsSetRTC(RTCQualityGPS, t); perhapsSetRTC(RTCQualityGPS, t);
return true; return true;
@ -87,11 +89,17 @@ bool NMEAGPS::lookForLocation()
auto loc = reader.location.value(); auto loc = reader.location.value();
latitude = toDegInt(loc.lat); latitude = toDegInt(loc.lat);
longitude = toDegInt(loc.lng); longitude = toDegInt(loc.lng);
foundLocation = true;
// expect gps pos lat=37.520825, lon=-122.309162, alt=158 // Some GPSes (Air530) seem to send a zero longitude when the current fix is bogus
DEBUG_MSG("new NMEA GPS pos lat=%f, lon=%f, alt=%d, hdop=%g, heading=%f\n", latitude * 1e-7, longitude * 1e-7, altitude, if(longitude == 0)
dop * 1e-2, heading * 1e-5); DEBUG_MSG("Ignoring bogus NMEA position\n");
else {
foundLocation = true;
// expect gps pos lat=37.520825, lon=-122.309162, alt=158
DEBUG_MSG("new NMEA GPS pos lat=%f, lon=%f, alt=%d, hdop=%g, heading=%f\n", latitude * 1e-7, longitude * 1e-7, altitude,
dop * 1e-2, heading * 1e-5);
}
} }
return foundLocation; return foundLocation;