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Bluetooth GPS - Very Poor Performance!?

Is it just me/my hardware or is GPS over Bluetooth absolutely rubbish!?
I tried a Holux GR-230 unit first but had the usual problems in getting it connected. When I finally did, I was apalled by it's performance, usually failing to get a gps lock at all.
So I ditched it in favour of a Rikaline GPS-6031-X7. It picked up far mor signals and usually obtained a lock almost instantly. However, it's accuracy is very disappointing. Positional accuracy - it's usually ok on a motorway or dual carriageway but at slower speeds, it jumps all over the place, forwards, backwards, in the middle of fields hundreds of yards away - and that's the worst time for it to happen 'cos it's when you slow down for a junction that you actually need it. The second issue is directional accuracy - it often shows me driving sideways as it's so sloooooow to update/recalc the direction.
If this was my first experience of gps, I might be able to forgive it without a benchmark to judge it against. But I've used Navman with an iPaq, a LAM1 unit with my Nokia 9210 and a (cheap) CF device with my Dell Axim and they all performed far, far better! I know that TomTom Navigator 2 isn't the problem as it performed flawlessly on my Axim (PXA255).
So what's going wrong? Is it the bluetooth devices, or the bluetooth technology, or the XDA II? Will O2's bluetooth update improve matters?
I can no longer rely on this and I'm going to have to start taking map backups - something I've never had to do before and really defeats the object.
Any thoughts, experiences, comments, answers?????
Ged.

I think your problem could be the gps receiver.
I am using the Navman 4400 with my XDAII. It took some time and a couple of patches (from this site, thanks guys) to get it to bond via bluetooth, but now it's setup, it works great. It seems to be very accurate and tells me to exit roundabouts just at the correct time.
It's a bit slow to get the initial fix when first switched on (about 2 minutes) but once connected I have no problems.
Is the gps receiver positioned by a heated screen? If so, this will block the signal and produce the problems you describe.

Have you changed your car? Some newer cars have reflective windshields that can cause problems.
Cheers

Thanks guys. I know of both of the issues you describe but I drive a 3 year old clio 172 - no heated/reflective screen. The receiver usually sits on the dash and receives a very strong signal from upwards of 6 sats.
I've now emailed Rikaline too so we'll see what they come up with (if anything).

I am using the Holux GR-230 and it works flawlessly with towas latest patch 1.0.1.2, a very accurate gps based on my own observations with tomtom2.

Hi guys
I have recently received my new XDA II from Orange (know as SPV M1000)
I am using it with the Fortuna Clip On GPS, Tom Tom Navigator and a Jabra 250 headset.
So far I have had no problems with the GPS, it works every time. On a rare ocasion I have to reset the phone to get the head set to work but this is very rare.
Not sure if orange have modified the software but it all seems to work.

I'm beginning to think that it's the XDA that's at fault. I know TTN2 is ok, you guys aren't having any probs with bluetooth gps devices in general, and I'd have to be extremely unlucky to have TWO faulty gps receivers from different manufacturers!
Persuading O2 that it's faulty is another matter though.

i work in the in car navi business and a 3 year old cleo does have a metalic winscreen apart from the hatched area around the rear view mirror (for use with toll tags and other antennas).You will nead a re-radateing antenna mounted externally to get propper reception as the cleo also has a faradays cage effect making radio reception within the cab area very difficult.(they are a ***** to work on)

pinkslayer, shove it in somebody elses car, or slap it on the roof of yours and see how it go's in that location.

Should know my car a bit better really!
I had tried mounting the Holux in front of the rear view mirror but this didn't help so I didn't bother trying the Rikaline. And my wife has a clio too so no point trying it in hers.
So even though I'm locking on to 5-6 sats, it's still not sufficient!? Or is the metallic screen just causing additional latency?

Its not the number of sats, its the strength of the signal received, I have seen 8 sats showing but tomtom wont attempt a route until the signals are strong enough for a lock,

Rikaline GPS-6031-X7
hi all
i use a Rikaline -x7 with TomTom Navigator 2 on my xda ll with the bluetooth pach from
http://bluetooth.i-networx.de/index_e.html
and the update is slow when taking corners (ie the map is slow to turn to the heads up position) or if you come of a motorway/ dual carriageway thats not on the calulated route it will take some time to acknowledge this
but i do not have the problem of it at slower speeds it jumps all over the place
As for accuracy my old tomtom wired gps was better
but the Rikaline-x7 is usable

Thanks peops. I've now tried mounting it on the rear parcel shelf and also stuck it to the shaded area above the rvm but to no avail (even when it was back on the dash this morning, it took 11 minutes to get a fix and another 5 before it could calc direction - cloudy day!). As soon as it's dry enough, I'll mount it outside the car and see how it is.
I don't really want to do down the re-radateing antenna route as the whole point of having portable equipment is that you can use it anywhere and in any vehicle.

Im using the Rikaline GPS 6031-X7 and Im really happy with, no problems at all in fact I think its brilliant............

I'm using the fortuna clipon in a landy with heated windscreen. It doesn't seem to affect the signal (with or without the screen on) and I have to say i was expecting problems with it. It has been the only thing about the whole BT GPS/XDAII setup that I haven't had problems with..
Technology eh!

GPS receivers questions

Hi,
Got my new bluetooth gps receiver a couple of days ago and I just have afew questions: It's a QSTARZ BT - Q880
1. It states that this receiver is 32 channel but when i check on tomtom how many sates i'm connected to I have only ever had a max of 8???
2. The gps works fine in the day but i tested at night and it cannot get a signal? I drove around for around 10 mins but still no signal? I doubt if the gps is faulty because it works fine in normal daytime light? I've also had my old ipaq with original wired tomtom receiver next to it and that picked up no problem.
any ideas on the above
cheers

hi
32 channels is just a bit of a gimmick 8 sats is around average for most standard BT receivers , SirfIII receivers due to there superior technology may average 10 or so.
The signal is not affected by light but can be interupted by other atmospheric conditions. When you are trying to get a lock don't drive around as this will just prolong the time to first fix. Also what vechicle are you driving and what is the position of the reciever . Many new cars have Thermic coatings on the windscreen which will lower the incoming GPS signals. When trying to get a fix check the sat screen in tomtom Grey bars indicate a satelite that can be seen but does not have a fix on its location. Blue bars are fixed satelites. you need 3 to get a 3d fix. Also try putting the receiver on the roof to determing if the car or surroundings are affecting signal stength.
If all this fails to shed any light on the problems maybe you have a tempramental reveiver .
Hope this helps
Keep me updated
Fergy

hi mate cheers for the reply. just a quick update i can get a signal indoors now no problem but havent had time to check at night again. I think when i first tested it was just one of them days but so far i'm really happy with it. Just gotta get used to tomtom on a wizard screen insteasd of an ipaq.
cheers

wifi speed problems

Hi all,
I've recently upgraded my joying mtcd rk3188 to px5 with a new motherboard from AliExpress. Everything works perfectly, except for wifi. Before, with my old motherboard, I could get max speeds from my phones (4g/lte) wifi Hotspot, or my home wifi router. After upgrading to px5 however, I get at most 20KB/s download speed. Putting my old px3 mobo back resolves the issue. The 2 wifi antennas are not touched in this process...
Relevant info: mcu version kgl 2.85 (latest), Rom Android 8.0 may 2018 (latest from dasaita thread). The wifi chip is a, rtl8188eu.
Does anyone have any idea?

MoiZie said:
Hi all,
I've recently upgraded my joying mtcd rk3188 to px5 with a new motherboard from AliExpress. Everything works perfectly, except for wifi. Before, with my old motherboard, I could get max speeds from my phones (4g/lte) wifi Hotspot, or my home wifi router. After upgrading to px5 however, I get at most 20KB/s download speed. Putting my old px3 mobo back resolves the issue. The 2 wifi antennas are not touched in this process...
Relevant info: mcu version kgl 2.85 (latest), Rom Android 8.0 may 2018 (latest from dasaita thread). The wifi chip is a, rtl8188eu.
Does anyone have any idea?
Click to expand...
Click to collapse
I'm having problems with it maintaining speed with MTCE_WWW_V2.80_1. on an EONON GA9180a, it starts out fast and perfect but slows down to .2 to .3 mbps

veriluxxxx said:
I'm having problems with it maintaining speed with MTCE_WWW_V2.80_1. on an EONON GA9180a, it starts out fast and perfect but slows down to .2 to .3 mbps
Click to expand...
Click to collapse
I have the same unit and the exact same WiFi speed issue, did you ever find a solution?

no I eventually returned it for a Xtrons unit but getting the same problems after updating android and MCU, do you have tmobile? I'm thinking it may be a throttling issue with them. I am also getting wifi authentication errors sometimes when I start up my car and it tries to connect to my phones hotspot.

all KGL units have this problem.. dosconnect the bluetooth and wifi will work fine.. you can not use both at the same time..
my advice, return the unit and get another type except kgl

this problem also exists on my MTCD GS unit even when there is no bluetooth device connected, so just buying a different one is unlikely to solve the problem. Someone needs to confirm that their wifi connection (also the device that opened the hotspot) worked stable over at least a few weeks otherwise i wouldnt buy a new one

I recently updated and wiped the android and mcu provided by Xtrons, its reconnecting successfully finally after sleep. However, I am getting speed issues still, after a couple of minutes of driving it slows down to .2 to .4 mbps.

veriluxxxx said:
no I eventually returned it for a Xtrons unit but getting the same problems after updating android and MCU, do you have tmobile? I'm thinking it may be a throttling issue with them. I am also getting wifi authentication errors sometimes when I start up my car and it tries to connect to my phones hotspot.
Click to expand...
Click to collapse
I'm on Verizon, I ended up just returning the unit for a refund after reading about all of the others who are having similar issues.
Such a shame really, these units have all of the features and functionality that I would ever need and will fit perfectly in the dash of my Silverado but all of the different brands seem to be marred with similar quality issues.

My tablets lost Gps signal in my car!

Hi, I bought a*Sm-t239 Samsung Tab4 as GPS navigator in my Micra Nissan Car (year*2008).
I encountered issue on my GPS system and the tablet often lost my GPS signal and the navigator recalculated always the route.
I searched on Google some tablet*that gets a best Gps system part and I found that Nexus 9 by HTC should be the best one.
But for both tablets I get about same results.
I noticed that for Samsung in Gps Status Toolbox app I get less satellites than Htc tablet and effectively when I go out the tunnels the Htc is faster than Samsung to localize my position.
I use both under windscreen through the stand*but I tried to move tablets on passenger seat and I get the same situation and GPS signal is lost.
I tried to use my OnePlus 5 phone that I arrange on my aeration nozzles and the phone always works fine! It gets abou 32 satellites.
Do you know what's the reason for my issues?
Sent from my Oneplus A5000 - Rome - Italy

Question Navifly 7862 6/128g QLED, gps signal reception problems

Hi, I bought the device in question for my Dacia Duster about eight months ago and I was fully satisfied, but for about a month I have had serious GPS reception problems. Initially, when I left the car from the garage, the GPS did not want to lock in the satellites and only started to work again when the car was restarted after a stop outdoors.
Now the problem has gotten worse, it seems that it doesn't want to know how to work anymore. I've tried everything from rebooting the device to clearing the cache of some apps (maps, Google play service, etc), but nothing seems to work.
Obviously we are talking about the original GPS receiver of the Dacia Duster which until a month ago was working very well.
Can you help me solve the problem?
Thank you.
gps signal reception problems

Have you checked the connections to the unit? They might have gotten loose or something.
My car didn't have an original GPS antenna, so I used the one which came with the unit. Still works perfectly fine, and locks in in a few seconds even from a cold boot.

daviddosa said:
Have you checked the connections to the unit? They might have gotten loose or something.
My car didn't have an original GPS antenna, so I used the one which came with the unit. Still works perfectly fine, and locks in in a few seconds even from a cold boot.
Click to expand...
Click to collapse
Yes, that was the first thing I checked and the connection is solid. Do you think maybe the GPS antenna needs to be replaced? If so, which one do you recommend?
Thanks.

I checked the listing on Aliexpress (https://www.aliexpress.com/i/1005002504629224.html). According to this, you should have a GPS antenna included with the unit.
This looks like it fits your unit and fairly cheap too: https://www.aliexpress.com/item/1005002061606837.html

I had the same issue with my unit - similar NaviFly 7862 unit - and its GPS. Just stopped working all of a sudden. After disconnecting it from the unit (and pulling out the unit to check for loosened wires and disable the internal mic while at it) everything seemed Ok so I put it back. Started working again and keeps working since.

In settings on the headunit, there is an option to look at the number of GPS satellites that have linked. Try change a few settings for GPS and see if you get different results on the number of connected satellites.

Thank you all, tomorrow I will install the original GPS antenna that arrived in the Navifly box. So far I had connected that stock of my car (Dacia Duster), may it be that it is not suitable and that this causes it to run intermittently?

ludditefornow said:
In settings on the headunit, there is an option to look at the number of GPS satellites that have linked. Try change a few settings for GPS and see if you get different results on the number of connected satellites.
Click to expand...
Click to collapse
I have looked at that setting many times, unfortunately when the Navifly is not receiving any satellite there is not much to do.

ludditefornow said:
In settings on the headunit, there is an option to look at the number of GPS satellites that have linked. Try change a few settings for GPS and see if you get different results on the number of connected satellites.
Click to expand...
Click to collapse
While there is an app to view satellites, There are no settings for GPS. Is your post a guess.

marchnz said:
While there is an app to view satellites, There are no settings for GPS. Is your post a guess.
Click to expand...
Click to collapse
What I mean is that when the Navifly "decides" it does not want to receive satellites, the few options in the GPS settings make no difference.
Anyway, today I replaced my car's GPS antenna with the one I received along with the Navifly. I will have to test its operation over time also because a couple of days ago the Navifly GPS had "decided" to resume receiving satellites.