# MQTT Subscriber from HMI - Not working

**URL:** <https://forum.inductiveautomation.com/t/mqtt-subscriber-from-hmi-not-working/72314>\
**Category:** General Discussion\
**Created:** [April 11, 2023, 4:53pm UTC](https://forum.inductiveautomation.com/t/mqtt-subscriber-from-hmi-not-working/72314 "2023-04-11T16:53:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Bart\_De\_Reu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bart_de_reu/32/45882_2.png) [@Bart\_De\_Reu](https://forum.inductiveautomation.com/u/Bart_De_Reu)\
**Post date:** [April 11, 2023, 4:53pm UTC](https://forum.inductiveautomation.com/t/mqtt-subscriber-from-hmi-not-working/72314/1 "2023-04-11T16:53:41Z")

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Hi all !

I am pretty new to MQTT , but i'm in kind of need to use it for a project i'm working on. This is the setup :

I have a Crouzet HMI with a Crouet EM4 PLC. I have enabled the MQTT on the HMI, and added a publisher to it with a few values to a test topic. I run a Mosquitto MQTT server on my windows computer. All is working fine, i use MQTTX on my windows pc to monitor the data and everything comes nicely in. But when i try to publish data from the MQTTX (or any other i tried) , the values don't get to the HMI subscriber. I tried with all different settings , of which none worked :

- I set the protocol version to 3.1 and 3.11
- I formatted the JSON exactly like it came in on the MQTT server
- I tried various different JSON formats (without brackets, without timestamp etc)
- Tried RAW data

This is an example of the test that has been posted from the HMI to the server , with a bit and a word as test

{  
"d" : {  
"PowerONOFF" : [false],  
"Fan" : [0]  
}  
}

when i try to change the value for the Fan , it doesn't get there.

Anyone having any experience in this? Thanks allot for any help .

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [April 11, 2023, 5:11pm UTC](https://forum.inductiveautomation.com/t/mqtt-subscriber-from-hmi-not-working/72314/2 "2023-04-11T17:11:13Z")

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This may not be the best community for this question. I don't see any Ignition components in your description. (Not to suggest that it isn't allowed--general discussion is open to non-Ignition questions.)

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**Author:** ![Bart\_De\_Reu](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bart_de_reu/32/45882_2.png) [@Bart\_De\_Reu](https://forum.inductiveautomation.com/u/Bart_De_Reu)\
**Post date:** [April 11, 2023, 5:39pm UTC](https://forum.inductiveautomation.com/t/mqtt-subscriber-from-hmi-not-working/72314/3 "2023-04-11T17:39:40Z")

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I realize that now , my bad. The topic can be closed.