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Topic: GPS SUPL Server : A-GPS

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Post #1
Kyklas
19 Jan 2015, 01:05

Hi,

I've been working with GTM382 modem on OpenWRT.
I managed to have a stable 3G connection.

The GTM382 modem have built-in GPS and support A-GPS.

I did most on my testing on one unit and it worked great, the first fix comes fast thanks to A-GPS.
I'm using this to do a geolocalisation project. I setup 3 RB411U + GTM382 as the embedded system.

I tested my scripts on a new board with an other gtm382 unit and there the A-GPS is no longer working.

Card SUPL OK
MO0402-11275

Product text:
====

Manufacturer: Option N.V.
Model: GTM382
Revision: 2.9.5.0Hd (Date: Jun 25 2009, Time: 16:52:40)
OK
====
Manufacturer:           Option N.V.
IMEI and Serial Number: #######################
Manufacturer's Revision:
2.9.5.0Hd (Date: Jun 25 2009, Time: 16:52:4
Hardware Revision:      2.1
Network Locked:         0
Customisation:          DEPRICATED
Band settings:          Europe 900/1800MHz (4)
APN:                    1,"IP","websfr","0.0.0.0",0,0
##### END #####

 ----------- Test 1 ---------
 AT_OGPS=0
OK
AT_OGPSEVT?
_OGPSEVT: 1

OK
AT_OGPSCLEAR="ALL",1

OK
AT_OGPSP=7,2
OK
AT_OGPSEVT=1
OK
AT_OGPSLS=1,"supl.google.com:7276"

OK
AT_OGPSCONT=1,"IP","websfr"
OK
AT_OGPS=2

OK

_OGPSEVT: 0

_OGPSEVT: 1

_OGPSEVT: 3
AT_OGCLK?
_OGCLK: "14/12/18,04:33:08

 ----------- Test 2 ---------
AT_OGPS=0
OK

_OGPSEVT: 5
AT_OGPSCLEAR="ALL",1

OK
AT_OGPSP=7,2
OK
AT_OGCLK="15/01/02,14:56:00"
OK
AT_OGPSEVT=1
OK
AT_OGPSLS=1,"supl.google.com:7276"

OK
AT_OGPSCONT=1,"IP","websfr"
OK
AT_OGPS=2

OK

_OGPSEVT: 0

_OGPSEVT: 1

_OGPSEVT: 3
Card SUPL Failure
MO0402-11279

Product text:
====

Manufacturer: Option N.V.
Model: GTM382
Revision: 2.9.5.0Hd (Date: Jun 25 2009, Time: 16:52:40)
OK
====
Manufacturer:           Option N.V.
IMEI and Serial Number: #####################
Manufacturer's Revision:
2.9.5.0Hd (Date: Jun 25 2009, Time: 16:52:4
Hardware Revision:      2.1
Network Locked:         0
Customisation:          DEPRICATED
Band settings:          Europe 900/1800MHz (4)
APN:                    1,"IP","websfr","0.0.0.0",0,0
##### END #####

 ----------- Test 1 ---------
AT_OGPS=0

OK
AT_OGPSEVT?
_OGPSEVT: 1

OK

_OGPSEVT: 5
AT_OGPS=0
OK
AT_OGPSCLEAR="ALL",1

OK
AT_OGPSP=7,2
OK
AT_OGPSEVT=1
OK
AT_OGPSLS=1,"supl.google.com:7276"

OK
AT_OGPSCONT=1,"IP","websfr"
OK
AT_OGPS=2

OK
AT_OGCLK?
_OGCLK: "80/01/06,00:00:00

OK
----------- Test 2 ---------
AT_OGPS=0

OK

_OGPSEVT: 5
AT_OGPSCLEAR="ALL",1

OK
AT_OGPSP=7,2
OK
AT_OGPSEVT=1
OK
AT_OGCLK="15/01/02,15:45:00"
OK
AT_OGPSLS=1,"supl.google.com:7276"

OK
AT_OGPSCONT=1,"IP","websfr"
OK
AT_OGPS=2

OK

The two card have the same firmware 2.9.5.0Hd. The A-GPS session starts with _OGPSEVT: 0 and ends with _OGPSEVT: 3. I tried setting the time on the unit but that doesn't change anything.

The only difference is MO0402-11275 vs MO0402-11279.
Perhaps it's some internal configuration of the modem. If anyone has some information about that it would be great.

Post #2
bournokz
2 Nov 2015, 09:16

Hi Kyklas

im having the same GTM382 and i manage to connect using HSO

Status: Connected
Connection time: 0d, 01:41:28
Received / Transmitted data: 19.6 KiB / 19.3 KiB
Operator: - etisalat.ae
Operating mode: -
Signal strenght: 58%
Device: Option N.V. GTM382
MCC MNC: 424 02
LAC: 1076 (4214)
LCID: - (-)
RNC: - (-)
eNB: - (-)
CID: C6CD (50893)
CSQ: 18
RSSI: -77 dBm
RSCP: - dBm
Ec/IO: - dB
RSRP: - dBm
RSRQ: - dB

However i am not able to get a-gps so maybe because of the firmware version which is
ati
Manufacturer: Option N.V.
Model: GTM382
Revision: 1.7.0.0Hd (Date: Nov 26 2008, Time: 13:38:19)

How can i update this firmware, and do you know some links to download the firmware update utility?
I tried in option.com but the only upload firmware but not the tools.

Regards,
Danny

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