# No AT# commands

**URL:** <https://forum.sierrawireless.com/t/no-at-commands/1008>\
**Category:** Open AT\
**Created:** [January 13, 2007, 11:38am UTC](https://forum.sierrawireless.com/t/no-at-commands/1008 "2007-01-13T11:38:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![evoortman](https://avatars.discourse-cdn.com/v4/letter/e/838e76/32.png) [@evoortman](https://forum.sierrawireless.com/u/evoortman)\
**Post date:** [January 13, 2007, 11:38am UTC](https://forum.sierrawireless.com/t/no-at-commands/1008/1 "2007-01-13T11:38:29Z")

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Hello,

I have three 2406B modules and two of them do not respond to AT# commands.  
The only thing i get back is ERROR.  
AT+ goes OK.  
Do i have to activate the AT# application, if so, how?  
Both modules have the same softwareversion.

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**Author:** ![jan](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@jan](https://forum.sierrawireless.com/u/jan)\
**Post date:** [January 13, 2007, 11:57am UTC](https://forum.sierrawireless.com/t/no-at-commands/1008/2 "2007-01-13T11:57:18Z")

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Hi evoortman,

Please post the answers to the following commands:

```auto
AT+WOPEN=2
AT+WOPEN?
```

Best Regards,  
Jan

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<div class="post-metadata">

**Author:** ![evoortman](https://avatars.discourse-cdn.com/v4/letter/e/838e76/32.png) [@evoortman](https://forum.sierrawireless.com/u/evoortman)\
**Post date:** [January 13, 2007, 3:18pm UTC](https://forum.sierrawireless.com/t/no-at-commands/1008/3 "2007-01-13T15:18:15Z")

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ati3  
641\_09gg.Q2406B 1328940 111903 18:23

at+wcfm=2  
+WCFM : 0007

at+wcfm=5  
+WCFM : 00000000

at+wopen=2  
+WOPEN: 2,“AT v02.10”

at+wopen?  
+WOPEN: 1

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<div class="post-metadata">

**Author:** ![jan](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@jan](https://forum.sierrawireless.com/u/jan)\
**Post date:** [January 13, 2007, 10:14pm UTC](https://forum.sierrawireless.com/t/no-at-commands/1008/4 "2007-01-13T22:14:41Z")

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Hi evoortman,

This:

> [@evoortman](#):
>
> at+wopen=2  
> +WOPEN: 2,“AT v02.10”

tells us, that the OpenAT version is 2.10 but that there is no target application downloaded in the module (but it’s running because +WOPEN: 1 😉 ). Otherwise it would look like:

```auto
+WOPEN: 2,"AT v02.10","AT v02.10"
```

So, you would need to get the application that enables you to use AT#. I don’t know anymore how this is called, but your distributor will know…

Best Regards,  
Jan