# Serial communication in tags

**URL:** <https://forum.inductiveautomation.com/t/serial-communication-in-tags/62694>\
**Category:** Ignition\
**Tags:** perspective, vision\
**Created:** [August 4, 2022, 6:42pm UTC](https://forum.inductiveautomation.com/t/serial-communication-in-tags/62694 "2022-08-04T18:42:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jykl5](https://avatars.discourse-cdn.com/v4/letter/j/9de053/32.png) [@jykl5](https://forum.inductiveautomation.com/u/jykl5)\
**Post date:** [August 4, 2022, 6:42pm UTC](https://forum.inductiveautomation.com/t/serial-communication-in-tags/62694/1 "2022-08-04T18:42:06Z")

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I have an application where I’m using a tag event script to read from a serial port at a set frequency.

I want to have a localized Ignition gateway continuously retrieve that information and be accessible for other application via OPC UA. And I have this working in a trial install.

My question is, do the realtime tags run as long as the Gateway is running, or does it need Vision/Perspective open for the tags to execute?

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 4, 2022, 6:55pm UTC](https://forum.inductiveautomation.com/t/serial-communication-in-tags/62694/2 "2022-08-04T18:55:13Z")

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Tag Event Scripts run independent of any UI. So no, a Perspective or Vision client is not required.