# Simple UART Echo Program

**URL:** <https://forum.sierrawireless.com/t/simple-uart-echo-program/4739>\
**Category:** Open AT\
**Created:** [November 11, 2010, 4:14pm UTC](https://forum.sierrawireless.com/t/simple-uart-echo-program/4739 "2010-11-11T16:14:40Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![mikejamesleslie](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@mikejamesleslie](https://forum.sierrawireless.com/u/mikejamesleslie)\
**Post date:** [October 3, 2011, 11:33pm UTC](https://forum.sierrawireless.com/t/simple-uart-echo-program/4739/20 "2011-10-03T23:33:14Z")

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Ok well that explains it. So if I update the firmware via Uart I should afterwards be able to use the usb functionality? Thanks

Btw I have started a new thread if you would like to respond further:

[https://forum.sierrawireless.com/t/using-ds-with-xact-dev-board/5277/1](https://forum.sierrawireless.com/t/using-ds-with-xact-dev-board/5277/1)

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