# MQTT bad formatted packet (IFM MasterIOLink)

**URL:** <https://forum.inductiveautomation.com/t/mqtt-bad-formatted-packet-ifm-masteriolink/73775>\
**Category:** 3rd Party Modules\
**Tags:** ignition81\
**Created:** [May 16, 2023, 1:14pm UTC](https://forum.inductiveautomation.com/t/mqtt-bad-formatted-packet-ifm-masteriolink/73775 "2023-05-16T13:14:34Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Paul\_Najberg1](https://avatars.discourse-cdn.com/v4/letter/p/e495f1/32.png) [@Paul\_Najberg1](https://forum.inductiveautomation.com/u/Paul_Najberg1)\
**Post date:** [May 16, 2023, 1:14pm UTC](https://forum.inductiveautomation.com/t/mqtt-bad-formatted-packet-ifm-masteriolink/73775/1 "2023-05-16T13:14:34Z")

</div>

Hello everyone,

I’m trying to get data from an IFM Master IO Link (AL1322).  
The connection works great.  
"

| CirrusClient | 16May2023 11:38:13 | ME-4aacfd3a-8014-42a5: MQTT Client connected to tcp://10.182.0.55:1883 on thread Thread-60054 |
| --- | --- | --- |
| CirrusClient | 16May2023 11:38:12 | ME-4aacfd3a-8014-42a5: Connected to tcp://10.182.0.55:1883 |
| CirrusClient | 16May2023 11:38:12 | ME-4aacfd3a-8014-42a5: connect with retry succeeded |
| " | | |

But I can’t manage to know why I keep having this warning and I can’t get my data.  
"  
NettyMQTTHandler 16May2023 11:39:14 Error decoding a packet, probably a bad formatted packet, message: Invalid protoName: MQTT  
"

My Master configuration :

![image](https://sea1.discourse-cdn.com/inductiveautomation/images/transparent.png)

If one of you already did this, I would love some help.

Thank you very much.

---

<div class="post-metadata">

**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\
**Post date:** [May 16, 2023, 5:35pm UTC](https://forum.inductiveautomation.com/t/mqtt-bad-formatted-packet-ifm-masteriolink/73775/2 "2023-05-16T17:35:16Z")

</div>

Cross linking parallel post:

> **[MQTT bad formatted packet (IFM MasterIOLink)](https://forum.cirrus-link.com/t/mqtt-bad-formatted-packet-ifm-masteriolink/368)**
>
> Hello everyone, I’m trying to get data from an IFM Master IO Link (AL1322). The connection works great. " CirrusClient 16May2023 11:38:13 ME-4aacfd3a-8014-42a5: MQTT Client connected to tcp://10.182.0.55:1883 on thread Thread-60054 ...