# HL6 TCP server continuous transparent: switch the UART

**URL:** <https://forum.sierrawireless.com/t/hl6-tcp-server-continuous-transparent-switch-the-uart/8024>\
**Category:** Legacy HL Series\
**Created:** [June 30, 2015, 6:48am UTC](https://forum.sierrawireless.com/t/hl6-tcp-server-continuous-transparent-switch-the-uart/8024 "2015-06-30T06:48:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wigersma](https://avatars.discourse-cdn.com/v4/letter/w/c0e974/32.png) [@wigersma](https://forum.sierrawireless.com/u/wigersma)\
**Post date:** [June 30, 2015, 6:48am UTC](https://forum.sierrawireless.com/t/hl6-tcp-server-continuous-transparent-switch-the-uart/8024/1 "2015-06-30T06:48:53Z")

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Hello,

I am trying to create a TCP server on the HL6528 module.  
The server should behave as a “continuous transparent: switch the UART to data mode” which is available in the Q2686 module.

This means the data receive on the TCP socket is direct forward to the UART.

There is a command “AT+KTCPSTART=1”, but this command can only be used if the module is in client mode.

Regards,

Michel

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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:** [July 7, 2015, 9:55am UTC](https://forum.sierrawireless.com/t/hl6-tcp-server-continuous-transparent-switch-the-uart/8024/2 "2015-07-07T09:55:43Z")

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Hi,  
Yes AT+KTCPSTART command is applicable only for the client mode, not for the server mode. TCP Server doesn’t support continuous transparent mode.

Thanks,  
Alex