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Moitessier HAT - No GPS
#11
Here:
https://www.segeln-forum.de/board194-boo...ost2166480
somebody had the same mistake (no gps with same config // MCS and moitessier) and has found out that the ssd is the problem.
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#12
I had about an hour this evening. I disconnected the USB 3 hub, removed the USB 3 WiFi dongle, and formatted a new SD card with the OpenPlotter Moitessier HAT image. I started the Pi, went through the initial setup sans the update at the end, updated OpenPlotter apps needing it, and installed the MCS app.

The SSD is unplugged and there is nothing plugged in either of  the USB 3 ports. The DC converter is powered down.
Internet is through the Ethernet cable. I think this is as basic a setup as there can be.

I tried both with and without the patch antenna.  I couldnt get outside. I was working inside, so didn't have a clear view of the sky. The green light remained solid and I never got a GPS fix.

I'll try again tomorrow with the project outside, having a view of the sky.
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#13
I had time this morning and can confirm that My problem is the SSD.  I first powered up the USB 3 hub without plugging in the USB 3 cable to the pi to test the DC converter.  GPS functions.  I then plugged in the USB 3 cables and the GPS functions.  I then plugged in the SSD and the GPS stops functioning.  Unplug the SSD and it starts working again.

The other day I found out that GPS antenna I had must be bad or of bad quality.  When I plug it in, GPS signal is cut at least in half. (I have no way to measure, but it seems that way)  I'm going to order another, but need to make a better choice.  The $10 Amazon Antenna is going back.

Why would the SSD cause interference with the GPS signal?  Is there a way to shield it, or do you think a different SSD might have less interference?

One more test...I moved the SSD outside the case, plugged into one of the USB ports on the hub. The SSD is now about 4 feet away from the Pi and everything seems to be working.
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#14
I like the speed and better reliability of the SSD over the SD.

Should I just purchase a USB GPS module and relocate the GPS outside of the enclosure?

If this is the best case, which module would you recommend?
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#15
(2020-06-21, 03:27 PM)jamieFL Wrote: I had time this morning and can confirm that My problem is the SSD.  I first powered up the USB 3 hub without plugging in the USB 3 cable to the pi to test the DC converter.  GPS functions.  I then plugged in the USB 3 cables and the GPS functions.  I then plugged in the SSD and the GPS stops functioning.  Unplug the SSD and it starts working again.

The other day I found out that GPS antenna I had must be bad or of bad quality.  When I plug it in, GPS signal is cut at least in half. (I have no way to measure, but it seems that way)  I'm going to order another, but need to make a better choice.  The $10 Amazon Antenna is going back.

Why would the SSD cause interference with the GPS signal?  Is there a way to shield it, or do you think a different SSD might have less interference?

One more test...I moved the SSD outside the case, plugged into one of the USB ports on the hub.  The SSD is now about 4 feet away from the Pi and everything seems to be working.

I think it is because of poor quality of the ssd or bad shirmed USB3.0 cable. Don´t realy know but have heared it multiply times....
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#16
Interesting and mysterious issue...
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#17
I've had my project running for about 3 days and the GPS has been pretty reliable even though my project is running indoors. So, the issue causing my problem was the SSD drive. BUMMER...
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