I need to replay collected gps data by gpsd for testing. I know that I can feed gpsd by tcp, for example: gpsd -N tcp://127.0.0.1:6000, but I can't find right format for feeding. What the format should I use?
What format gpsd uses for feeding?
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If you want to replay the GPS data for testing, you can use
gpsfaketool from the gpsd suite: https://gpsd.gitlab.io/gpsd/gpsfake.htmlRegarding the log format that it can use
So I would record the log from a real GNSS receiver with
gpspipe -R > gps.logand later use gpsfake to replay it during testing without GNSS receiver.
edit: The
gpspipe -Rcommand will save a NMEA log if the receiver outputs NMEA messages. It can be later used for testing with gpsfake or other tool. Of course you can kill gpsd and just directly listen to the serial port to record the NMEA.