I2c address retrieval

[Laurent]

Hi all,

i have been working for three months to make a 40X2 communicate with a Teltonika TM2 GSM modem, using I2c interface. Picaxe is master, TM2 slave.
I am sure the TM2 works properly as I could set up a communication with the Picaxer through the UART

Unfortunately, as I was not aware of the specific TM2 I2c address (I even emailed the Teltonika CEO), I tried to communicate using the $00 address (global call). I was expecting the TM2 to reply.
It does not make sense, but I saw no signal on the data analyser at this specific address ($00). I tried with other addresses, casually, at least I saw the signal (address) sent by the master (and no response from the TM2 slave)

Your help is more than welcomed.
Laurent

 

[nick12ab]

Are you sure it's i2c? The only one I found was USB. Can you provie a link?

 

[westaust55]

PICAXE chips do not support i2c global calls.

 

[JimPerry]

Appears not to be I2C just plain serial - it was used in this project:

http://www.parallax.com/Portals/0/Downloads/contest/2010rfdesign/IntelligentFallDetectorFullReport.pdf checkout page 46/47

which also uses the rather neat I2C accelerometer from parallax ( available at DX.com for $10 )

 

[hippy]

Appears not to be I2C just plain serial

That is the impression I get from the documentation I glanced through. There appears to be an I2C interface but that may be for application use rather than control and configuration, I2C master rather than slave.

 

[westaust55]

Concur with hipy.
Teltonika User Manuals indicate the presence of an i2c interface but there is absolutely no information provided about the use of same.
See for examaple: http://download.maritex.com.pl/pdfs/wi/GSM-TM2.pdf