# MQTT engine update tags

**URL:** <https://forum.inductiveautomation.com/t/mqtt-engine-update-tags/59069>\
**Category:** Ignition\
**Created:** [April 29, 2022, 8:03pm UTC](https://forum.inductiveautomation.com/t/mqtt-engine-update-tags/59069 "2022-04-29T20:03:39Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Andrew\_Mikaiel](https://avatars.discourse-cdn.com/v4/letter/a/c2a13f/32.png) [@Andrew\_Mikaiel](https://forum.inductiveautomation.com/u/Andrew_Mikaiel)\
**Post date:** [April 29, 2022, 8:03pm UTC](https://forum.inductiveautomation.com/t/mqtt-engine-update-tags/59069/1 "2022-04-29T20:03:39Z")

</div>

can someone please explain how to update opc tags externally through engine module? for example i can transmit data through transmission into mqttfx, but then i cannot write back to those tags through mqttfx, can someone please explain how to achieve this?..thanks