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Re: COEX GPS (model UBX-M8030 IC) on Raspberry Pi 4 Model B 2018 connect

From: Gary E. Miller
Subject: Re: COEX GPS (model UBX-M8030 IC) on Raspberry Pi 4 Model B 2018 connection issues
Date: Fri, 30 Jul 2021 20:06:03 -0700

Yo Aranza!

On Fri, 30 Jul 2021 21:48:13 -0700
Aranza Shaccid Leon <> wrote:

> May I ask how I set up the path for gpsd to connect to a USB GPS?

Depends on if you use systemd(umb) or udev.  Those make it
automatic, when they work.

Depends on the receiver.  Your reciever may be /dev/ttyUSBx, where x
can be 0 to 9.  Or /dev/ttyACMx, or something else.

If you are NOT using systemd(umber) or udev, and your receiver is
/dev/ttyACM0, then just:
        gpsd -n /dev/ttyACM0

This is all in the gpsd man page.

> I
> have downloaded version 3.22, but I'm unsure how to set up the
> DEVICES:"/dev/ttyACM1" command.

YOu only do that for some flavors or systemd(umbest) and not others.

Sorry, can't help you with systemd(umbest).

> While I was gpsd version 3.17 I could
> use sudo nano /etc/default/gpsd to set up the path, but for this
> version I'm don't know where to find this. May I

If you can't find the file, then maybe gpsd is not running under
systemd(rool), so just ry:
        gpsd -n /dev/ttyACM1

> I know I need to use udev rules (my gps is a u-blox 8 of the port
> ttyACM0)

No, you do not.  Do it the simple way first.

> so the commands in the files pi@clover-4865:~/gpsd $ nano
> seem to do this, but do I need to replace gps%n with a
> value?

Sorry, I never do that, too complicated for me.  Never needed to.
> Or is it in pi@clover-4865:~/gpsd/gpsd-3.22.1~dev/clients/gps $ nano

Do not edit, or any other file in the build tree.  Follow the
build instructions in build.adoc.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin

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