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GPS has been running for at least a day.

Define "GPS has been running for at least a day".? By default, your GPS puck won't be activated by gpsd and start listening for GPS details until it has a listening client like direwolf, cgps, gpsmon, etc.? This seems to be a default for minimizing power consumption.? The gpsmon tool doens't show how long it's been running with a 3D fix but cgps does.

The GPS has had a device connected to a device. It supports 4 different devices. One device is the same RPi Direwolf is running on but is an terminal window on my PC with cgps running. Now a second device (PC/u-center) is connected.

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What constitutes a “very good” lock?

That's evidently a huge topic in itself and is well outside the scope of this Direwolf.? I did a search for "gpsd 3d lock" and this hit seems like a good start:

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A key point in that article is that though your system lists it's using X satellites, it doesn't mean it's hearing them well.? This can be due to local RF interference, etc.?

I can see I have a 3D position all the time now that my Windows PC is connected. I am aware of the FIX differences and how everything can affect the satellite signal; trees buildings, angle of antenna, etc. Not being snarky! If this was a serial GPS or a USB-GPS (serial?) there would be no BT layer and for serial, using /dev/ttyS0 would be correct and USB would be similar. Based on an exchange with Robert KB8RCO it seems this maybe the case here. If may be that each of the four possibilities need /dev/ttys0-3? In the end, I will have learned a little more.

This is what I get when running gpsmon. Any clues there?

More information is available in cgps but there are other tools available to troubleshoot GPS issues such as gpsprof but I've never used them.? Ultimately, I don't think your issue is with Direwolf.. it's going to be somewhere in the GPS into GPSD area.? I would start here:??

I will certainly check this group. From my PC experience on needing to actually connect to a COM port, I wonder if a RPi “comport” must be connected as well. Robert, KB8RCO, suggested something regarding auto-connecting at reboot but I haven’t chased that since the basic connection is not functional yet.

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Thank you!

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Fred N7FMH

Screenshots from the u-blox u-center app: