Multi-Tech Systems GPRS (MTMMC-G) Benutzerhandbuch

Chapter 13 – Specific AT Commands  

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

133 

 

Description: 

This command starts, stops, deletes, and gets information about the current Open AT

®

 embedded 

application. 

This command also allows you to erase the Open AT

®

 flash objects storage place and to configure the 

Application and Data (A&D) storage place size.  

0 

Stop the Open AT embedded application. If this one was running, the product resets 

1 

Start the Open AT embedded application. If this one was stopped, the product resets 

2 

Get the Open AT library versions 

3 

Erase the objects flash of Open AT embedded application 

4 

Erase the Open AT embedded application 

Suspend (in Wavecom software kernel) the Open AT embedded application tasks 

If the (A&Dsize) parameter is used, configure the Application & Data storage size. Otherwise, 
display the current A&D storage place size and Open AT application space size. If the A&D 
storage place size has changed, the product resets. 

  

• 

For Mode=1: If the main version numbers returned by the AT+WOPEN=2 command do 
not match, the command will reply +CME ERROR: 541. 

• 

Mode=3 and 4 are only available only if the Open AT embedded application is stopped 
(AT+WOPEN=0). 

• 

Open AT embedded applications can be resumed with the AT+OPENRES command or 
INTERRUPT feature (see +WCFM). 

• 

Warning: With Mode 6, any A&D size change will lead to this area format process (this 
process will take some seconds on start-up , before the +WIND:3 indication display (up to 
1.5 seconds per 64 Kbytes flash sector size can be considered as a maximum; all A&D 
cells data will be erased). 

<IntVersion> 

ASCII string giving the internal Open AT library version. 

<ExtVersion> 

ASCII string giving the external Open AT library version. 

If no embedded application is loaded, the <ExtVersion> parameter does not 

appear. 

Usable only with <mode>=6 

[0 -1344] 

Kbytes size allocated for the Application & Data storage place. Default = 768 

Kbytes. 

Provided parameter value will be updated with the nearest flash sector subdivision 

(64 Kbytes). For example, if a 100 Kbytes size is required, a 128 Kbytes size will 
effectively be set.  

Returned with <mode>=6 

 

Open AT Application reserved size (in Kbytes). This size is deducted from the 

<A&Dsize> one, since the whole available size for Open AT and A&D storage 
places are 1600 Kbytes (<OATSize> + <A&Dsize> = 1600). 

syntax: AT+WOPEN=<Mode>[,<A&Dsize>] 

Response syntax according to mode:  +WOPEN: <Mode>[,<IntVersion>[<ExtVersion>]] 

or 
+WOPEN: <Mode>,<A&DSize>,<OATSize>] 

AT+WOPEN=? +WOPEN: 

(0-6),(0-1344) 

OK 

AT+WOPEN? +WOPEN: 

0 

OK 

AT+WOPEN=2 
Note: Get the Open AT library 
versions 

+WOPEN: 2, “AT  v3.01”, “AT  v2.10” 
OK 
Note: Open AT v2.10 library version. An embedded application has been 
downloaded on this product 

AT+WOPEN=1 

 

+CME ERROR: 541 
Note: Since main versions do not match, the Open AT Application 
cannot be started 

AT+WOPEN=2 
Note: Get the Open AT library 
versions 

+WOPEN: 2, “AT v2.00”,”AT v2.00” 
OK 
Note: Open AT v2.00 library version. An embedded application has been 
downloaded on this product.