# Connection failed to broker please help

**URL:** <https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086>\
**Category:** General\
**Tags:** mqtt\
**Created:** [2 May 2022 20:38 UTC](https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086 "2022-05-02T20:38:39Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ayanda](https://avatars.discourse-cdn.com/v4/letter/a/ecccb3/32.png) [@Ayanda](https://discourse.nodered.org/u/Ayanda)\
**Post date:** [2 May 2022 20:38 UTC](https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086/1 "2022-05-02T20:38:39Z")

</div>

02 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883  
2 May 22:29:07 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883  
2 May 22:29:07 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://[::1]:1883  
2 May 22:29:08 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1883  
2 May 22:29:08 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880  
2 May 22:29:09 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1.1880:1883  
2 May 22:29:12 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:1880:1883  
2 May 22:29:12 - [info] [mqtt-broker:75ba03721a7c7e7c] Connection failed to broker: who-are-you@mqtt://127.0.0.1:18

---

<div class="post-metadata">

**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [2 May 2022 21:03 UTC](https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086/2 "2022-05-02T21:03:11Z")

</div>

Hi and welcome to the forum.

You didn't say which O/S you are running. But this works if you are on a RasPi or ubuntu.

My local notes below:  
You will have to open TWO command lines/terminal sessions.

## How to send MQTT messages

-h HOST  
-t TOPIC  
-m MESSAGE

`mosquitto_sub -h 127.0.0.1 -t armtronix_mqtt`

`mosquitto_pub -h 127.0.0.1 -t armtronix_mqtt -m "Hi this is Armtronix_server"`

---

<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:** [2 May 2022 21:08 UTC](https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086/3 "2022-05-02T21:08:43Z")

</div>

Show us what you have entered in the MQTT config node settings

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [1 July 2022 21:08 UTC](https://discourse.nodered.org/t/connection-failed-to-broker-please-help/62086/4 "2022-07-01T21:08:46Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.