# MQTT Transmitter LWT Messages

**URL:** <https://forum.inductiveautomation.com/t/mqtt-transmitter-lwt-messages/72125>\
**Category:** Ignition\
**Created:** [April 5, 2023, 10:42pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmitter-lwt-messages/72125 "2023-04-05T22:42:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JAHIR\_TORRES](https://avatars.discourse-cdn.com/v4/letter/j/9fc348/32.png) [@JAHIR\_TORRES](https://forum.inductiveautomation.com/u/JAHIR_TORRES)\
**Post date:** [April 5, 2023, 10:42pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmitter-lwt-messages/72125/1 "2023-04-05T22:42:25Z")

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I need to know when the transmitter lost connection with a broker, because i'm losing information.  
I'm working already with a history store but i want to send a message to the client when the transmitter is not available.  
Someone knows how configure the LWT message for the transmitter?

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**Author:** ![sjohnson](https://avatars.discourse-cdn.com/v4/letter/s/71c47a/32.png) [@sjohnson](https://forum.inductiveautomation.com/u/sjohnson)\
**Post date:** [April 13, 2023, 10:40pm UTC](https://forum.inductiveautomation.com/t/mqtt-transmitter-lwt-messages/72125/2 "2023-04-13T22:40:49Z")

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Hi Jahir\_Torres,

In the Designer, MQTT has a 'Transmission' provider. You can open the folders for the Broker and Client, there is an 'Online' tag. To monitor if the transmitter is available, you can set up an alarm on this tag to send a notification if 'Online' turns to false. If you have additional questions about MQTT, I'd encourage reaching out to [Cirrus Link](https://cirrus-link.com/contact-support/) for assistance.

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/c/ac7f0150c2da17df78eb9d33a3280ce543c17ec4.png)