GPS Week Number Rollover [WNRO]

M8TJT · Posted: Sat Apr 27, 2019 10:45 pm Post subject:

Dennis, your'e old enough to have been playing with God when he was a lad.

Kremmen · Posted: Sun Apr 28, 2019 5:44 am Post subject:

Ah, the old references:

Before the dead sea reported sick
Before Pontius took flying lessons
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DashCam:
Viofo A119 V3

DeLorean · Posted: Sun Apr 28, 2019 2:43 pm Post subject:

DeLorean · Posted: Sun Apr 28, 2019 3:18 pm Post subject:

...when the Loch Ness Monster was a tadpole Very Happy

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🔸🔸 Currently using TomTom GO 940 & Locus Map 🔸🔸

DennisN · Posted: Sun Apr 28, 2019 3:27 pm Post subject:

I don't do e-bay and I don't do PayPal and I had a letter two months ago saying that as I hadn't used my credit card for many months, they were cancelling it.

The batteries are easy to replace if you use MikeAlder (I did). Not that I care because my TT is always plugged into the ciggy thing.
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Dennis

If it tastes good - it's fattening.

Two of them are obesiting!!

DeLorean · Posted: Sun Apr 28, 2019 7:54 pm Post subject:

DennisN · Posted: Sun Apr 28, 2019 8:02 pm Post subject:

550, 750, 950 all say Out of stock.
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Dennis

If it tastes good - it's fattening.

Two of them are obesiting!!

DeLorean · Posted: Sun Apr 28, 2019 8:18 pm Post subject:

DeLorean · Posted: Mon Apr 29, 2019 8:13 pm Post subject:

Interesting if you diddle Navcore v9.541 into an x10 or an original TomTom One 1st Edition (both of which use the SiRFstarIII GPS chip) the satellite lock issue disappears and they appear to work perfectly.
This demonstrates that it’s an issue with the Navcore and not the SiRFstarIII GPS receiver hardware/firmware... which could be easily fixed if TomTom gave a toss.
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rwbaldwin · Occasional Visitor Joined: Dec 24, 2012 Posts: 55

DennisN · Posted: Tue Apr 30, 2019 2:29 pm Post subject:

Do you get that email after your satnav has navigated you to the end of the earth?
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Dennis

If it tastes good - it's fattening.

Two of them are obesiting!!

justbrowsing · Frequent Visitor Joined: Nov 10, 2011 Posts: 679

DeLorean · Posted: Tue Apr 30, 2019 9:15 pm Post subject:

Kremmen · Posted: Wed May 01, 2019 5:45 am Post subject:

I've refrained from using a phone for heavy duty navigation tasks.

I did try it some years ago and the heat build up and battery life suffered. I remember taking it out of its car holder and putting in my top pocket and having to immediately take it out as it felt like it was burning me.
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DashCam:
Viofo A119 V3

DeLorean · Posted: Thu May 02, 2019 11:19 am Post subject:

Okay... after reading some articles and running a few test of my own, here’s my take on why different legacy TomTom devices are having differing issues after the WNRO.
The problems reported range from the clock reading 00:00, issues locking onto satellites and/or locking on to any satellites at all.

1) The x10 range, TomTom ONE 1st edition and others use the SiRFstarIII (SiRF Technology ) microprocessor GPS chip.
This chip does not have an issue with the WNRO and outputs the data string as an NMEA string.
The problem lies in the Navcore software not being able to correctly interpret the NMEA string since the WNRO change.
The could be easily resolved by TomTom if the Navcore were tweaked accordingly.

2) Other older TomTom devices use the GL1 and GL2 (Global Locate now Broadcom) microprocessor GPS chip and possibly others.
Unfortunately these GPS chips do have a problem with the WNRO and do not output an NMEA string.
As the issue with these devices lie with the GPS receiver’s firmware/hardware it’s very doubtful whether this is will be resolved.

After successfully running a modded 9.541 Navcore on my old TomToms with SiRFstarIII GPS receivers proves that there is no issue with the SiRFstarIII GPS hardware and TomTom could resolve the issue quite easily.
On newer Navcore devices just replacing the GLGPS file with one included in the official 9.541 Navcore resolves the issue.

If TomTom are unwilling to fix the issue I’m sure a cunning monkey somewhere with the appropriate programming skills will modify the problematic Navcores.
Global Locate powered devices will most likely remain bricked.
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🔸🔸 Currently using TomTom GO 940 & Locus Map 🔸🔸

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