GSM Modem & AT-Syntax?

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi,

I just got my Siemens emem ES75 GSM (GPRS, EDGE, ...) Modem.
First, I wanted to try it on my PC, wich works fine with the Windows Modem Wizzard .. It connected to the internet ..

After this, I wanted to controll it by myself using the AT-Syntax but every command, which starts with "AT+..." like "AT+GMI" (Requests the Manufacturer Identification) fails with a "ERROR" response .. Why?
Windows (and a ActiveX toolkit named "SMS and MMS toolkit" from ActiveXperts) is using the same Syntax .. (I sniffed it!)
Commands starting with "AT&.." are working well .. (like "AT&V").

Why does it fail? Any advice?

2

Is there no one who could help me?

3

it would help if you posted a wiring diagram and the code you are using.

4

Now it is connected to my PC (while it works perfectly) via USB. It simulates a Serial Port (COM4).
I connected to it with Putty.
A few days before it works since I disconnected it from power.

As it worked, I've sent the AT&V command to show the settings:

ACTIVE PROFILE:
E0 Q0 V1 X4 &C1 &D2 &S0 \Q0 \V1
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060 S8:000 S10:002 S18:000
+CR: 0
+CRC: 0
+CMGF: 1
+CSDH: 0
+CNMI: 0,0,0,0,1
+ICF: 3
+IFC: 0,0
+ILRR: 0
+IPR: 115200
+CMEE: 0
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,"000000","FFFFFF"
^SLCC: 0
^SCKS: 0,1
^SSET: 0
+CREG: 0,1
+CLIP: 0,2
+CAOC: 0
+COPS: "T-MOBILE D"
+CGSMS: 3

But now (not working) AT&V's output is

Current   Settings............
 E0  H0  Q0  V1
&C0 &D0 &P1 &R0 &S0

S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S06=000 S07=030
S08=000 S09=000 S10=000 S11=000 S12=050 S13=000 S14=000 S15=000
S16=000 S17=000 S18=000 S19=000 S20=000 S21=000 S22=000 S23=000
S24=000 S25=005 S26=001 S27=000 S28=000 S29=000 S30=000 S31=000
S32=000 S33=001 S34=000 S35=000 S36=000

 #0 :
 #1 :
 #2 :
 #3 :
 #4 :
 #5 :
 #6 :
 #7 :
 #8 :
 #9 :

First it says "ACTIVE PROFILE" and now "Current Settings"

Why?

5

Push

Nothing? :-/