# Access WP7702 from external processor via serial interface?

**URL:** <https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195>\
**Category:** mangOH Red\
**Created:** [November 30, 2018, 7:05pm UTC](https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195 "2018-11-30T19:05:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![datalasse](https://avatars.discourse-cdn.com/v4/letter/d/a8b319/32.png) [@datalasse](https://mangoh.discourse.group/u/datalasse)\
**Post date:** [November 30, 2018, 7:05pm UTC](https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195/1 "2018-11-30T19:05:34Z")

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I want to send and receive data from WP7702 via a serial interface from an external processor. Without to have to do any changes in the Legato code. I want to use the WP7702 as a radio module only and configure it with help of AT commands.

Is that possible or do I have to do changes in the Legato code, even when using the WP7702 without the mangOH red?

/Lars

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**Author:** ![asyal](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/asyal/32/78_2.png) [@asyal](https://mangoh.discourse.group/u/asyal)\
**Post date:** [December 1, 2018, 2:39am UTC](https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195/2 "2018-12-01T02:39:35Z")

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Thats ok to use.  
Just set the UART into AT mode.  
You can use the at mode even after you go past the mangoh stage

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**Author:** ![datalasse](https://avatars.discourse-cdn.com/v4/letter/d/a8b319/32.png) [@datalasse](https://mangoh.discourse.group/u/datalasse)\
**Post date:** [December 2, 2018, 10:18am UTC](https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195/3 "2018-12-02T10:18:49Z")

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Thanks for the info asyal.

That raises more questions:  
Were can I read more about setting the UART-mode?  
Do I have to set the UART-mode after each time the WP7702 is powered off?

/Lars

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**Author:** ![asyal](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/asyal/32/78_2.png) [@asyal](https://mangoh.discourse.group/u/asyal)\
**Post date:** [December 4, 2018, 5:51am UTC](https://mangoh.discourse.group/t/access-wp7702-from-external-processor-via-serial-interface/2195/4 "2018-12-04T05:51:15Z")

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> [@Need Information On UART](https://mangoh.discourse.group/t/need-information-on-uart/50/5):
>
> Hello @dfrey, I was attempting to get into the UART and found your post. I tried to follow your instructions but what was returned was “-sh: mircom: not found” I tried sudo… "sudo: not found: apt-get… "apt-get: not found Any help would be great, Thanks Kas P.s. My final goal is to read data from a UART port and posting the data to AirVantage.

or [https://source.sierrawireless.com/resources/legato/howtos/customizeuart/](https://source.sierrawireless.com/resources/legato/howtos/customizeuart/)  
should help