# AT commands without Application

**URL:** <https://forum.sierrawireless.com/t/at-commands-without-application/2282>\
**Category:** Open AT\
**Created:** [June 25, 2008, 1:37pm UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282 "2008-06-25T13:37:45Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![schneeweiss](https://avatars.discourse-cdn.com/v4/letter/s/a8b319/32.png) [@schneeweiss](https://forum.sierrawireless.com/u/schneeweiss)\
**Post date:** [June 25, 2008, 1:37pm UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282/1 "2008-06-25T13:37:45Z")

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Hello,

I use a Q2686H on an Q26 Developer Board. I dont get any AT commands working for a while now. The device is properly connected to the pc, because a few days ago the AT commands were possible.

My question is…

When I erase the Application, Customization and Object Data with DWLWIN - do I still would get the AT commands?  
(I guess I should, but I dont!)

The only data I get on the serial port is the binary information which is send as long as the boot pin is activated when I restart the device.

What can I do now?

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**Author:** ![schneeweiss](https://avatars.discourse-cdn.com/v4/letter/s/a8b319/32.png) [@schneeweiss](https://forum.sierrawireless.com/u/schneeweiss)\
**Post date:** [June 27, 2008, 2:30pm UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282/2 "2008-06-27T14:30:46Z")

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The AT commands work without an Open AT Application

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**Author:** ![trthaithong](https://avatars.discourse-cdn.com/v4/letter/t/22d042/32.png) [@trthaithong](https://forum.sierrawireless.com/u/trthaithong)\
**Post date:** [June 30, 2008, 3:41am UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282/3 "2008-06-30T03:41:18Z")

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Hi schneeweiss,  
I think your firmware is fail, you should re-download firmware.  
ttt

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**Author:** ![paruthiv](https://avatars.discourse-cdn.com/v4/letter/p/eb8c5e/32.png) [@paruthiv](https://forum.sierrawireless.com/u/paruthiv)\
**Post date:** [July 1, 2008, 1:33pm UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282/4 "2008-07-01T13:33:48Z")

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There is no application required to get the AT commands working. Did you try to download the firmware again and check?

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**Author:** ![schneeweiss](https://avatars.discourse-cdn.com/v4/letter/s/a8b319/32.png) [@schneeweiss](https://forum.sierrawireless.com/u/schneeweiss)\
**Post date:** [August 4, 2008, 1:01pm UTC](https://forum.sierrawireless.com/t/at-commands-without-application/2282/5 "2008-08-04T13:01:46Z")

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The firmware was broken. I was not able to recover the wireless cpu. I got a new one and it works just fine.