MobileGPS

General support for the Pi-Star System
PE1KZU
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MobileGPS

Post by PE1KZU » Sat May 23, 2020 4:25 pm

Hi,

After installing pistar 4.1.2, I enabled Mobile GPS from the expert - MMDVMHost menu.
Although the release notes mention that MobileGPS is added in and available on the dashboard, I don't see it.
Are there special requirements to be able to see MobileGPS?

Thanks,
Bert PE1KZU
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MW0MWZ
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Re: MobileGPS

Post by MW0MWZ » Sat May 23, 2020 5:01 pm

You will need a USB GPS module, and it *should* build the config file /etc/mobilegps for you, manually turning it on in MMDVMHost wont help, it is possible that the config file creation failed - if you have an /etc/mobilegps that just has two "Enable" lines in it, delete the file and reboot the Pi and see if its created correctly afterwards.
Andy

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ea7gwc
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Re: MobileGPS

Post by ea7gwc » Sat May 23, 2020 5:10 pm

Image

W8DSB
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Re: MobileGPS

Post by W8DSB » Sun May 24, 2020 1:55 am

Andy, what USB GPS is recommended? Will any $10 GPS from eBay work? Which one are you testing with?

W8DSB

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Re: MobileGPS

Post by PE1KZU » Sun May 24, 2020 9:11 am

Thanks for your response Andy.
Ok, I will have to get myself an USB GPS, or try if I can use my Garmin for this.

Best Regards,
Bert PE1KZU
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MW0MWZ
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Re: MobileGPS

Post by MW0MWZ » Sun May 24, 2020 2:58 pm

W8DSB wrote:
Sun May 24, 2020 1:55 am
Andy, what USB GPS is recommended? Will any $10 GPS from eBay work? Which one are you testing with?

W8DSB
Thats a great question, I'm still testing with it so I dont have the greatest of answers yet.
Andy

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LU9XRL
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Re: MobileGPS

Post by LU9XRL » Sun May 24, 2020 3:02 pm

https://photos.app.goo.gl/dwBWHBw5i6uuiWiE6

hi I have 4.1.2 installed, the mobile gps activated the gps VK-172 connected and it does not update me the position what can it be?
According to the image, is the file well configured?
Darío Lanza
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NQ4T
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Re: MobileGPS

Post by NQ4T » Sun May 24, 2020 3:35 pm

MW0MWZ wrote:
Sun May 24, 2020 2:58 pm
W8DSB wrote:
Sun May 24, 2020 1:55 am
Andy, what USB GPS is recommended? Will any $10 GPS from eBay work? Which one are you testing with?

W8DSB
Thats a great question, I'm still testing with it so I dont have the greatest of answers yet.
How is it getting GPS data? Is it just probing the serial port for NEMA messages?

I did something kinda like this with a bash script because I wanted to beacon to APRS-IS with connected group information...but the main difference is I was pulling data from an existing gpsd device on my network.

If it's just probing for standard NEMA...then it should work with any GPS device pumping out NEMA sentences. The question is if it's listening to all the possible prefixes. NEMA sentence prefix is a standard...but I do know when I was playing with the "GPS Tethering" apps that just made GPS data from a cell phone available over a UDP port...it was reformatting sentences. Probably not an issue if you're connecting a hardware receiver.

I seem to recall I poked around trying to figure out how MobileGPS worked before trying to bolt on a bash script; but I hadn't done much coding at that point so I didn't poke around any of the source code.

n9mxq
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Re: MobileGPS

Post by n9mxq » Sun May 24, 2020 4:25 pm

Doesn't seem to like my U-blox7. Unless I didn't do something I'm supposed to. It shows up in LSUSB, but when I reboot after enabling mobilegps. I don't see anything. Checked for the mobilegps file in etc/ and it was nonexistent.
Gene in Belvidere IL
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That's what these forums are for.
There's much more brainpower collected here
than I have alone.

NQ4T
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Re: MobileGPS

Post by NQ4T » Sun May 24, 2020 4:35 pm

I have exactly one GPS module and it's an Adafruit Pi hat.

That being said...I could probably make it in to a USB module with an Arduino.

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