# MQTT won't connect between two networked devices

**URL:** <https://discourse.nodered.org/t/mqtt-wont-connect-between-two-networked-devices/47871>\
**Category:** General\
**Created:** [1 July 2021 02:09 UTC](https://discourse.nodered.org/t/mqtt-wont-connect-between-two-networked-devices/47871 "2021-07-01T02:09:54Z")\
**Posts on this page:** 1\
**Showing post:** 6

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [1 July 2021 08:06 UTC](https://discourse.nodered.org/t/mqtt-wont-connect-between-two-networked-devices/47871/6 "2021-07-01T08:06:30Z")

</div>

There must\* be only one broker.

All clients (node-red is a client, your device is a client) talk to **ONE** broker

That is the definition of a broker ( A _broker_ is an intermediary between clients )

[This thread](https://discourse.nodered.org/t/new-user-odd-stiuation/45742/19) might help you get it.

\* there can of course be more than one broker but for what you are trying to achieve, there should only be one broker

---

_[View the full topic](https://discourse.nodered.org/t/mqtt-wont-connect-between-two-networked-devices/47871)._