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Old November 16th 15, 10:31 PM posted to alt.cellular.gsm
gm
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Posts: 12
Default GSM localization - triangulation

I was thinking on buying such product but the end user want's to go with
sim900 ( because of budget )

I forget to write in the original topic that i have tried this commands too:

AT+COPS=?
AT+CSQ
AT+CREG=2
AT+CREG ?

The answer was:
+COPS: (2,"TELE2","","21902"),(1,"T-Mobile
HR","T-Mobile","21901"),(3,"HR VIP","VIP","21910"),,(0,1,4),(0,1,2)

+CSQ: 14,0

AT+CREG?
+CREG: 2,1,"006F","1C90"

The location is cca 10 km away from my original location...
What do you think about this ?

Am going to make test with your suggestion and will write back the results.

GM



On 16.11.2015 16:02, John Henderson wrote:
gm wrote:

Anyhow, if you have any more suggestions, please be so kind and write it
down...


The flippant answer is to buy a GSM modem like the Sierra Wireless 312U
(no longer available new). It has an onboard GPS receiver which can be
activated, and the exact position of the modem read with a few AT
commands.

But persevering with your SIM900, the big question is what you can get
out of engineering mode.

I'd try:

AT+CENG=3

followed by:

AT+CENG?

Without a SIM900 myself, I'm not in a position to explore further. I'm
sure you'll have further questions as you progress.

John