# MQTT Transmission message decoding **URL:** \ **Category:** 3rd Party Modules\ **Created:** [November 21, 2016, 5:54pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-message-decoding/12387 "2016-11-21T17:54:17Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![brianrumburg](https://avatars.discourse-cdn.com/v4/letter/b/8dc957/32.png) [@brianrumburg](https://forum.inductiveautomation.com/u/brianrumburg)\ **Post date:** [November 21, 2016, 5:54pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-message-decoding/12387/1 "2016-11-21T17:54:17Z")
I’m having trouble properly decoding the protobuf message being emitted on tag change by the MQTT Transmission module. The binary message received doesn’t appear to be following the Kura protobuf definition as expected. I followed the example from [here](https://docs.chariot.io/display/CLD/Sending+OPC+Tag+Data+with+Transmission) and have documented the steps to reproduce in a simple Node.js project on GitHub. [github.com/brianrumburg/mqtt-transmission-test](https://github.com/brianrumburg/mqtt-transmission-test) Is anyone else working with this module? ---
**Author:** ![jean.noel.dotter](https://avatars.discourse-cdn.com/v4/letter/j/c68b51/32.png) [@jean.noel.dotter](https://forum.inductiveautomation.com/u/jean.noel.dotter)\ **Post date:** [October 3, 2018, 1:41pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-message-decoding/12387/2 "2018-10-03T13:41:18Z")
Dear Brian, have you succeded to decode the MQTT messages, or encode them? Thanks, ---
**Author:** ![a.florin72](https://avatars.discourse-cdn.com/v4/letter/a/54ee81/32.png) [@a.florin72](https://forum.inductiveautomation.com/u/a.florin72)\ **Post date:** [February 11, 2019, 1:55pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmission-message-decoding/12387/3 "2019-02-11T13:55:23Z")
I use [https://mqttfx.jensd.de/](https://mqttfx.jensd.de/) to decode the Sparkplug messages.