Difference between revisions of "Automation - MQTT"
| Line 1: | Line 1: | ||
{{{!}} class="wikitable" style="float: right; width: 322px;" border="2" | {{{!}} class="wikitable" style="float: right; width: 322px;" border="2" | ||
{{!}}+ Proven on: | {{!}}+ Proven on: | ||
{{!}}- | {{!}}- <!-- Debian --> | ||
{{!}} style="text-align: center; width: 72.1125px;" {{!}} [[File:Logo Debian.png{{!}}60px{{!}}link=https://www.debian.org/{{!}}center{{!}}middle{{!}}frameless]] | |||
{{!}} 11 (bullseye) | |||
{{!}} ([[#Debian / Version Caveat{{!}}caveat]]) | |||
<br> | |||
{{!}}- <!-- LMDE --> | |||
{{!}} style="text-align: center; width: 65.675px;" {{!}} [[File:Logo LMDE.png{{!}}60px{{!}}link=https://linuxmint.com/edition.php?id=279{{!}}center{{!}}middle{{!}}frameless]] | |||
{{!}} 4 | |||
{{!}} ([[#Debian / Version Caveat{{!}}caveat]]) | |||
<br> | |||
{{!}}- <!-- Linux Mint --> | |||
{{!}} style="text-align: center; width: 67.5125px;" {{!}} [[File:Logo Mint.png{{!}}60px{{!}}link=https://linuxmint.com{{!}}center{{!}}middle{{!}}frameless]] | {{!}} style="text-align: center; width: 67.5125px;" {{!}} [[File:Logo Mint.png{{!}}60px{{!}}link=https://linuxmint.com{{!}}center{{!}}middle{{!}}frameless]] | ||
{{!}} | {{!}} 19.3 / 20.3 | ||
{{!}} | {{!}} | ||
<br> | |||
{{!}}- <!-- Ubuntu --> | |||
{{!}} style="text-align: center; width: 65.7px;" {{!}} [[File:Logo Ubuntu.png{{!}}60px{{!}}link=https://ubuntu.com/{{!}}center{{!}}middle{{!}}frameless]] | {{!}} style="text-align: center; width: 65.7px;" {{!}} [[File:Logo Ubuntu.png{{!}}60px{{!}}link=https://ubuntu.com/{{!}}center{{!}}middle{{!}}frameless]] | ||
{{!}} 20.04.3 | |||
{{!}} | |||
<br> | |||
{{!}}- <!-- Sparky Linux --> | |||
{{!}} style="text-align: center; width: 65.7px;" {{!}} [[File:Logo Sparky.png{{!}}60px{{!}}link=https://sparkylinux.org/{{!}}center{{!}}middle{{!}}frameless]] | {{!}} style="text-align: center; width: 65.7px;" {{!}} [[File:Logo Sparky.png{{!}}60px{{!}}link=https://sparkylinux.org/{{!}}center{{!}}middle{{!}}frameless]] | ||
{{!}} 5.11 | |||
{{!}} ([[#Debian / Version Caveat{{!}}caveat]]) | |||
<br> | |||
{{!}}} | {{!}}} | ||
Revision as of 20:55, 14 January 2022
 |
11 (bullseye) | (caveat)
|
 |
4 | (caveat)
|
 |
19.3 / 20.3 |
|
 |
20.04.3 |
|
 |
5.11 | (caveat)
|
As always...
Start with:
sudo apt updatesudo apt upgrade
Installing Mosquitto
sudo apt-get install mosquitto
Pretty simple, eh?
Ensure that Mosquitto broker is running
sudo service mosquitto status
expected result is Active: active (running)
Note: Ubuntu repositories have an outdated version
If you want to know which version you've installed...
mosquitto
(Ignore the error message "Error: Address already in use". It's already running as a service.)
Install client tools for testing etc
(Do this on any machine expected to manually use MQTT)
sudo apt install mosquitto-clients
Testing
In a terminal:
mosquitto_sub -h localhost -t "mqtt" -v
In another terminal:
mosquitto_pub -h localhost -t "mqtt" -m "Hello MQTT"
Now the message “mqtt Hello MQTT” will be displayed in the first terminal where the topic “mqtt” is subscribed.
Subscribing to # gives you a subscription to everything except for topics that start with a $ (these are normally control topics anyway).
Debian / Version Caveat
During an install on a raw Debian system, I discovered that Mosquitto refused connection when I tried to access it with anything other than "localhost" as the hostname...
Apparently, mosquitto 2.0 binds only to the loopback interface unless specifically told otherwise.
& Debian installs v2.0 or higher...
But for now, It's a simple matter of editing the config file for Mosquitto.
sudo vi /etc/mosquitto/mosquitto.conf
& add in:
listener 1883 allow_anonymous true
Then,
sudo service mosquitto restart