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Nemerix chip datum
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slink
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Joined: Oct 09, 2004
Posts: 16

PostPosted: Tue May 31, 2005 10:18 pm    Post subject: Nemerix chip datum Reply with quote

Hi,
Has anyone got a listing of Nemerix chip control codes. I believe they start $PNMRX, followed by the instruction number and its data. I have been able to change the NMEA stream rates OK, but my GPS is consistently giving an offset of approx 50 metres north and 20 metres west (compared with either my Roadangel or my GPS III) - which I guess is the wrong datum setting.
According to the supplied software, it seems the datum is controlled by $PNMRX106 with data of 216 to set WGS 84. However, this is giving this error when I send it, so I am trying to find if there's been an update in the chip datum list, but not the driver software!
Cheers,
Steve.
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lbendlin
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Joined: 02/11/2002 22:41:59
Posts: 11878
Location: Massachusetts, USA

PostPosted: Tue May 31, 2005 10:44 pm    Post subject: Reply with quote

I thought the chipset identifier is three letters, as in $PSRF or $PXEM. Can you try that?
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slink
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Joined: Oct 09, 2004
Posts: 16

PostPosted: Wed Jun 01, 2005 12:05 pm    Post subject: Reply with quote

Hi Lutz,

Thanks for your idea! I am not sure what to try for Nemerix - perhaps NMX or something? However, I think the code is OK, as if I use $PNNMRX108 to set the NMEA data stream iteration rate, this works ok.

I have just tried sending a raw datum setting to the GPS (i.e. USER DATUM, with the WGS84 figures inserted), but I now need to go out into the rain to get a good signal and test it Sad

I cannot find any information on the data commands on the web, the Nemerix website has no information, and I cannot find any updates to their Control Tool Lite that came with the unit, which contains all these codes - I wonder if the chipset has been updated, but shipped with an old software CD.

I shall keep on playing with it, as it is a lovely, small unit that seems to last very well on its rechargeable battery, but all this is no good if it gives the wrong position!

Steve.
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FloatingFatMan
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Joined: May 18, 2005
Posts: 9

PostPosted: Fri Jun 03, 2005 11:43 am    Post subject: Reply with quote

I had similar problems with my Nemerix chipped BT-77. In the end, sending a factory reset from the supplied utility fixed the offset problem.
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neiko
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Joined: Aug 01, 2004
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PostPosted: Tue Jun 07, 2005 8:36 am    Post subject: software Reply with quote

Hi, i have a copy of the software version 0.93 if it's any use to you?
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Drikus
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Joined: Jun 12, 2005
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PostPosted: Sun Jun 12, 2005 3:01 pm    Post subject: Reply with quote

If possible i woul dlike a copy asswell
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Drikus
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Joined: Jun 12, 2005
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PostPosted: Mon Jun 13, 2005 10:05 am    Post subject: Reply with quote

http://members.home.nl/r.winder/Bluetooth_GPS_102.pdf scrolldown for datacmds..
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Drikus
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Joined: Jun 12, 2005
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PostPosted: Mon Jun 13, 2005 10:46 am    Post subject: Reply with quote

And the control tool http://members.home.nl/r.winder/Bluetooth_NctLite.exe altough i am not able to get it work on comport 14... where mine ppp slave BT-GPS connection should be..
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Geremia
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Joined: Jul 28, 2005
Posts: 1

PostPosted: Fri Jul 29, 2005 12:40 am    Post subject: Reply with quote

Hi all, first post

i got today a nemerix bluetooth gps from ebay, and started investigating:)

take a look here, some imput command explained

http://www.infortech.net.cn/pdf/WD-N101.pdf

ISP mode is not explained very well, it sound something like in sistem programming or what?!!?
I also opened mine, and saw that there is something like a serial connection available (vcc, gnd, rx, tx) but don't know already if rs232 or ttl.
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krafte
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Joined: Jul 30, 2005
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PostPosted: Sat Jul 30, 2005 11:18 pm    Post subject: Reply with quote

Hi, first post too,

got any further with the problem?

My bt-gps worked well when i got it from ebay, but after i pushed the factory reset button in nemerix control tool, i have the same problem with offset. it shows now a position 100m north of me Crying or Very sad , and more worse it doesn't react on changing the datum in nclite tool, the positions just stays the same.

I think I'll write to the nemerix support tomorrow, hope they can help Sad
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Gfr
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Joined: Aug 25, 2005
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Location: QUARTO [NA - ITA]

PostPosted: Thu Aug 25, 2005 5:10 am    Post subject: Nemerix Problems Reply with quote

Hi all. First post 2. 8)


I bought a Nemerix chip GPS receiver on eBay (user aktronix), last week.

Perfect shipment, the package was ok... But...
I had the same problem: an offset on the real position.

Well... I used the Nemerix Control Tool Lite before using GPS receiver on the mobile phone, just to test it. I DID NOT pushed "Factory reset" or "Datum" or "Set NMEA" buttons. When I linked the receiver to the mobile phone, TomTom or Route66 did not work.

There was this "strange" offset. Moreover the altitude was wrong.
Look @ this video:

http://www.gianfrancoreppucci.com/GPS/100_1858.MOV

I contacted the seller, who told me that this was the first case of malfunction. I contacted Nemerix support too, but there was no reply.

Annoyed of this, today I mounted my notebook in the car and started a test session. Arrived in an open space place, I opened the Nemerix Control Tool Lite and sent the "Factory Reset" code to the GPS receiver;
then rebooted it. After 2 or 3 minutes, the GPS fixed 8 satellites (and that was "normal": it fixed a lot of satellites even if the track was wrong).

Even if the altitude was wrong again, I tried opening TomTom... AND...
It seems to work right, now! I can't believe it.

I will repeat a lot of testing sessions... If you can, use the NCTL to reset the GPS with factory settings, and restart it many times...

I think that the factory reset and the first boot after it must be done in a very open space... Try doing so...

Feedbacks are welcome.
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dave_bass5
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Joined: Aug 16, 2005
Posts: 37
Location: London, uk

PostPosted: Fri Aug 26, 2005 4:49 pm    Post subject: Reply with quote

I also cant get NCTL to connect on com14 from my pc.
only com 1-3 seems to work.
anyone got any ideas?
im using the lattest widcomm drivers

Dace.
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Gfr
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Joined: Aug 25, 2005
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PostPosted: Fri Aug 26, 2005 9:21 pm    Post subject: Reply with quote

Try using the Hyper Terminal client provided by Windows
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Gfr
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Joined: Aug 25, 2005
Posts: 5
Location: QUARTO [NA - ITA]

PostPosted: Fri Sep 02, 2005 4:10 pm    Post subject: Reply with quote

UPDATE: Nemerix Tech Support replied me.

>> Dear Gianfranco,
>>
>> Probably this issue is due to the wrong Datum, but there are something
>> need to be confirm.
>> 1) Is the GPS Bluetooth BT-77 from WondeProud?
>> 2) What's the software version number? You can find the version number
>> using hot-start command.
>> 3) Did you have been change the setting(Datum)?
>>
>> The attached file is V1.0.5 of NctLite, the old version can not change
>> the
>> Datum setting, because the Datum command was changed, there are few
>> method can remove from the wrong Datum.
>>
>> 1) Please change the Datum to WGS84 using NctLite R1.0.5.
>> 2) Press the Factory button can change the Settings to default, the
>> default
>> Datum is WGS84.
>> 3) Open the case of BT-GPS, and remove the backup battery for few
>> seconds,
>> the Settings will change to default too.
>>

They sent me the NCTLITE V1.0.5.

If you are interested, I can give it to you.
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lbendlin
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Location: Massachusetts, USA

PostPosted: Fri Sep 02, 2005 5:14 pm    Post subject: Reply with quote

we most definitely are. If you can send it to me I'll post it in the downloads section.
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Lutz

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