Altitude is frozen to zero

Fri Jun 22, 2012 10:02 am

mpourdas wrote:I think I explained my problem very precisely in my first post. It is not a problem related to the number of available satellites. Even if there are many, my altitude is frozen to 0 and everything else is fine. With gjak 1.08 skin, the number of available satellites also shows up as zero (even though this is not true) in the bar in the bottom. So the altitude and the APPEARED number of satellites are correlated for sure at least in my gps.

Assume that by standing in the same place I put it to sleep and then wake it up. Then both fields, that is the appeared number of satellites and altitude, start to show values. For example, if I am in my home city, 7-8 satellites and a reasonable altitude of around 250m show up. The rest of the GPS is working normally, before or after the sleep/wake procedure.

So, I tried to play with various settings in my GPS but with no success. So I started to search the internet for sys.txt files to see what are the "lines" that people use. Btw my sys.txt is rather minimal, almost like the one given by Yurbuh here a few days ago in his repair kit). Given all the above, I looked for lines containing the word satellite, but nothing was found, or gps; anything that would "trigger it". So I tried under [gps] things like source=..., port=... and the one with set_messages=0 worked. If I remove it, back to the problem. I say again I do not know why, I do not even know what this line is supposed to do. Neither the baud that was mentioned in a previous post.

I have done the "experiments" driving from home to work and also one day in a parking, nothing to argue on that aspect. So I have solved my problem, but I do not understand "why".

You clearly missed my point. That is when I am correct in a way. The altitude above the horizon the satellites are is important, I believe.
I explain why I think that:
When somehow the 24 satellites would be in a flat circle, they could only determine your location in 2D, right? But when they are in a round shape, a basketball, they can exactly spot you in 3D, which is what the relation is between altitude and position on the map.
Only we are talking about 3 or 4 or 5 satellites, constantly moving. So when for a short moment the satellites can't determine your 3D in a ball because they are on a relatively flat circle ....

But it was just an idea. And it makes sense. To me :o

I sure don't understand why the sys.txt line does work. But when, the better

Fri Jun 22, 2012 2:13 pm

Dear Nabi, what you say it may make sense, but I do not think it is related to my issue. I can sit here in my office, delete the line from the sys.txt and go back to the problematic situation. Put it back and it shows my altitude. It is as simple as that. I can repeat the experiment in any location where the signal is good.

Now, if the altitude is correct, it is a separate matter.

I am happy that it works but, as Yurbuh agrees, it may not work for somebody else. It would be nice if Siberian tries that and tell us the result.

Fri Jun 22, 2012 5:32 pm

mpourdas wrote:I am running iGo Primo 9.6.5.211211 on a Wayteq x960bt with WIN CE 6.0.

Even though everything else is functional, the altitude appearing on the screen is frozen to 0. If I also use the gjak 1.08 skin, the number of available satellites also shows up as zero.

Searching the internet I found out a workaround, which is to put iGo on sleep and then wake it up. Then the two things above work normally.

However I would like to find a more convenient solution. Like something in the sys.txt file? Is there anybody encountering the same problem? Any solution?

Thanks in advance.

I'm having the exact same issue with any version of Primo, while iGO8 works correctly. I'm running it on a chinese WinCE 5.0 GPS with 64 MB RAM. Sometimes when Primo starts, very rarely, everything is OK, it shows altitude and number of satellites (some of them are in green color and some of them are in red color... and number of satellites is sum only from the green ones). But more often it shows zero for altitude and number of satellites is shown as zero, and all of the satellites are shown in red color. Never mind one or another way shown it navigates correctly and shows wright position, only altitude is not shown.

Can you tell me how do you put Primo to sleep? I have tried to turn of GPS and turn it on again, tried to turn it off from the arrive menu and turn it on again without success.

mpourdas wrote:... I found a solution to the problem by adding to sys.txt the following:

[gps]
set_messages=0

...

This line does not solve this issue in my case.

Fri Jun 22, 2012 10:12 pm

More properly, I should have said I put the device to sleep, simply by pressing the power button.

Sat Jun 23, 2012 4:26 am

Thanks. Already tried that, my device when pressed the power button shuts down completely, does not go into sleep mode. So this is a no go for me.

Sat Jun 23, 2012 9:24 am

Did the devices suspend and wake up properly before primo was installed?

Sat Jun 23, 2012 9:48 am

Nope, my device does not have an option to go into sleep by pressing the power button. When I press the power button (and hold for a while) it shuts down. That is why I asked how to put Primo into sleep mode.

Sat Jun 23, 2012 9:53 am

Primo can either suspend on loss of external power or you can have it suspend on a long press of the menu key, (you may need the dimka skin installed)

But some devices don't support suspend

Sat Jun 23, 2012 12:04 pm

joker wrote:When I press the power button (and hold for a while) it shuts down.

Fatboyfun wrote:But some devices don't support suspend

If all else fails, EXITing Primo, and then starting it back up might do it...unless that is too much of a bother.