# Ignition Edge IIoT vs Transmission Module

**URL:** <https://forum.inductiveautomation.com/t/ignition-edge-iiot-vs-transmission-module/73877>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [May 18, 2023, 1:50am UTC](https://forum.inductiveautomation.com/t/ignition-edge-iiot-vs-transmission-module/73877 "2023-05-18T01:50:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Douglas\_Lawrie](https://avatars.discourse-cdn.com/v4/letter/d/a87d85/32.png) [@Douglas\_Lawrie](https://forum.inductiveautomation.com/u/Douglas_Lawrie)\
**Post date:** [May 18, 2023, 1:50am UTC](https://forum.inductiveautomation.com/t/ignition-edge-iiot-vs-transmission-module/73877/1 "2023-05-18T01:50:36Z")

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Quick question on Ignition MQTT modules. Why the distinction between the IIoT module for Ignition Edge vs the Transmission module for Ignition? Can Ignition Edge with IIoT receive NCMD/DCMD Sparkplug messages as well as publish NDATA/DDATA?

Just concerned that there are some Edge IIoT limitations that I don't know about.

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**Author:** ![kcollins](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kcollins/32/19646_2.png) [@kcollins](https://forum.inductiveautomation.com/u/kcollins)\
**Post date:** [May 18, 2023, 1:29pm UTC](https://forum.inductiveautomation.com/t/ignition-edge-iiot-vs-transmission-module/73877/2 "2023-05-18T13:29:08Z")

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[Ignition Edge IIoT](https://inductiveautomation.com/ignition/edge-iiot) does use Cirrus Link's MQTT Transmission Module, so you should have no differences there in Sparkplug functionality.