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GPSD doesn't report signal dropout

From: Tom Isaacson
Subject: GPSD doesn't report signal dropout
Date: Wed, 7 Oct 2020 14:24:23 +1300

We are using gpsd 3.19 on a Quectel EC25 Mini PCIe
( GPS seems to work fine
until we lose the signal (e.g. go into a tunnel).

The NMEA0183 output shows when I disconnect/reconnect the antenna:
See $GPRMC validity ( change from A (ok)
to V (invalid) and back again.

The GPSD log shows the same - you can see the lock disappear and reappear:

But the client app never sees the dropout:

Any suggestions? Is this a known bug, have we just compiled with the
wrong flags, what?


Tom Isaacson

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