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The Comvette Project - diy BOSE Replacement for C4e Corvettes
Blog Post

2019-07-23

USB GPS Receiver Integration

GPS Receiver The Comvette system employs a USB Global Positioning System receiver to collect GPS data. In order for Comvette to collect data from the GPS it must be told where to look for the GPS device on your Comvette system.

With the GPS receiver plugged in to an available USB port, open a terminal window and enter this command:

ls /dev/serial/by-path/

When the GPS receiver is recognized by the Raspberry Pi, it will appear as an entry in the /dev/serial/by-path folder.

In my case this is what I see:

platform-3f980000.usb-usb-0:1.1.3.4:1.0-port0

NOTE: If you have other USB devices installed that appear as serial devices, you will have to plug and unplug the GPS device and re-issue the ls command to identify which entry belongs to the GPS.

So, this means that the GPS receiver can be accessed by this path:

/dev/serial/by-path/platform-3f980000.usb-usb-0:1.1.3.4:1.0-port0

You now have to edit the Comvette configuration file with this command:

sudo nano /home/pi/echo-dev/comvette/comvette.ini

Edit the "device=" entry under the "[GPS]" section heading to add the path to the GPS device. It should look something like this:

[GPS]
device=/dev/serial/by-path/platform-3f980000.usb-usb-0:1.1.3.4:1.0-port0

Now save the file and restart the Raspberry Pi.

When the GPS is working the Comvette GPS Recorder panel should show the GPS date/time being updated continuously.

NOTE: If you move the GPS receiver to a different USB port, you will have to update the Comvette config file with the new path. But once you have the GPS receiver plugged in and working, you probably won't ever need to move it to another USB port unless you are reconfiguring the hardware in your system.

 
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