# MQTT Transmission tag limit

**URL:** <https://forum.inductiveautomation.com/t/mqtt-transmission-tag-limit/82277>\
**Category:** 3rd Party Modules\
**Created:** [November 23, 2023, 5:01am UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-tag-limit/82277 "2023-11-23T05:01:36Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![TChenier](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@TChenier](https://forum.inductiveautomation.com/u/TChenier)\
**Post date:** [November 23, 2023, 3:11pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-tag-limit/82277/2 "2023-11-23T15:11:06Z")

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This is more likely due to AWS IoT Core's message size limitation of 128 KB.  
When a client publishes a message that exceeds the limit, IoT Core will drop the connection.

[https://aws.amazon.com/iot-core/pricing/#:~:text=You%20can%20send%20and%20receive,metered%20in%205%20KB%20increments.](https://aws.amazon.com/iot-core/pricing/#:~:text=You%20can%20send%20and%20receive,metered%20in%205%20KB%20increments.)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/1/61fde9f1930234239669657a02d22cb8ed0f68b3.png)

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