# Open UART problem

**URL:** <https://forum.sierrawireless.com/t/open-uart-problem/5629>\
**Category:** Open AT\
**Created:** [May 29, 2012, 1:29pm UTC](https://forum.sierrawireless.com/t/open-uart-problem/5629 "2012-05-29T13:29:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![enymotion](https://avatars.discourse-cdn.com/v4/letter/e/bb73d2/32.png) [@enymotion](https://forum.sierrawireless.com/u/enymotion)\
**Post date:** [May 29, 2012, 1:29pm UTC](https://forum.sierrawireless.com/t/open-uart-problem/5629/1 "2012-05-29T13:29:34Z")

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Hi,

do I have a possibilitiy to Open UART 1 in Open AT with the AT Command AT+WDU=1,115200

I tried:

adl\_atCmdSubscribe ( “AT+WDU=1,115200”, cbDirectUartCmdHandler,( ADL\_CMD\_TYPE\_PARA | UA\_WDU\_CMD\_PARAM\_CONFIG ) );

and

adl\_atCmdUnSubscribe ( “AT+WDU=1,115200”, (adl\_atCmdHandler\_t) cbDirectUartCmdHandler);

and with

adl\_atCmdCreate

but nothing works.

Can somebody help me?

Thanks a lot.

PS: cbDirectUartCmdHandler is the UART Handler function: static void cbDirectUartCmdHandler ( adl\_atCmdPreParser\_t \* paras )

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [June 4, 2012, 10:13am UTC](https://forum.sierrawireless.com/t/open-uart-problem/5629/2 "2012-06-04T10:13:14Z")

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Hi,

> [@](#):
>
> but nothing works.

When you say this, what exactly is the problem? Are you getting some error?  
Make sure that the UART intended to be opened in the AT+WDU command is different from the one from where this command is issued.

Regards,  
Rex

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<div class="post-metadata">

**Author:** ![enymotion](https://avatars.discourse-cdn.com/v4/letter/e/bb73d2/32.png) [@enymotion](https://forum.sierrawireless.com/u/enymotion)\
**Post date:** [June 5, 2012, 8:11am UTC](https://forum.sierrawireless.com/t/open-uart-problem/5629/3 "2012-06-05T08:11:55Z")

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Hi,

thank you. I solved the problem. I learned that the At+WDU command doesn`t do the same like the AT+WMFM command.

I changed my code so that UART will be opened directly with Speed 115200 without a specific command.