# MQTT connection between old version Edge and V8.3 Gateway

**URL:** <https://forum.inductiveautomation.com/t/mqtt-connection-between-old-version-edge-and-v8-3-gateway/110641>\
**Category:** Ignition\
**Created:** [September 15, 2025, 9:17pm UTC](https://forum.inductiveautomation.com/t/mqtt-connection-between-old-version-edge-and-v8-3-gateway/110641 "2025-09-15T21:17:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![chaoliang](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@chaoliang](https://forum.inductiveautomation.com/u/chaoliang)\
**Post date:** [September 15, 2025, 9:17pm UTC](https://forum.inductiveautomation.com/t/mqtt-connection-between-old-version-edge-and-v8-3-gateway/110641/1 "2025-09-15T21:17:57Z")

</div>

I have newly installed ignition gateway V8.3.

The MQTT Engine and Distributor are V5.00 beta 2.

I installed a new ignition edge with MQTT transmission module V5.00 beta 2. It can communicate with the V8.3 Gateway.

But when I tried to connect from an existing installed MQTT transmission module V4.0.15, the edge cannot connect with new V8.3 gateway.

Is it a version compatible issue?

Is there any ignition MQTT module compatible matrix table I can refer to?

Or another question, the edge ignition is V8.1.24, can I upgrade the edge MQTT transmission version to V5.00 beta 2?