Questions tagged [mqtt]
MQTT - a light on the wire protocol for publish/subscribe. Clients and servers in various languages, C, Python, Erlang, C# and Java and Javascript.
25 questions
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How to forward data via netns exec namespace
I'm using zmq to receive data from another pc. I would like to formard this received data to the Internet via namespace. I've created this python script:
import subprocess
import zmq
context = zmq....
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2
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772
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How to run multiple mosquitto brokers on Debian 11?
I want to have 2 mosquitto brokers running on Debian 11, each with it's own configuration.
I have one instance installed and running, but don't know how to start second.
I'm a newbie so please answear ...
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705
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ModuleNotFoundError running Python Script as systemd task
I have a Python script which I'd like to run at startup. However when I run it as a systemd service, it seems to be unable to find one of the modules. Here's the status message:
● mqttproc.service - ...
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203
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Trying to fit a complicated bash string into a mqtt message
I am trying to fit the output of the following string (that is a simple number)
df -hl | grep '/dev/mapper/4tb' | awk '{;percent+=$5;} END{print percent}' | column -t
into the following mqtt message
...
- 919
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Mosquitto unable to use certificates from letsencrypt
I am trying to set up Mosquitto using this guide:
https://www.digitalocean.com/community/tutorials/how-to-install-and-secure-the-mosquitto-mqtt-messaging-broker-on-ubuntu-18-04
I am using ubuntu 20.04 ...
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253
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Recovering from USB dongle disconnection with systemd
If this is not the right place to post a this question, please say.
I’m running zigbee2mqtt (Zigbee broker) on a USB dongle device (CC2531 with antenna, forgot the antenna model) and a Linux machine (...
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478
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Disable client SSL certificate
I have generated client key certificate on self signed secure Mosquitto server. I have copied CA and client certificate with client key into client machine. Client subscription runs fine:
...
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Is it possible to encrypt traffic if I have only CA certificate?
I have simple secure (I guess) Mosquitto server described in my previous question.
Client machine has no any keys or certificate installed except single ca.crt certificate file generated and taken ...
- 853
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137
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Ensure TLS communication security in Mosquitto
I have simple MQTT Mosquitto server that I'm trying to make secure.
Mosquitto.conf:
log_type all
password_file /etc/mosquitto/mosquitto_users.txt
pid_file /var/run/mosquitto.pid
persistence true
...
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2
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MQTT Error: Connection Lost
A 'listener' console was setup:
mosquitto_sub -h test.mosquitto.org -t "myTopic" -v
mosquitto_pub returns an error:
pi@raspberrypi:~ $ mosquitto_pub -h test.mosquitto.org -t 'myTopic' -m 'hello ...
- 1,532
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Can the MQTT output be inferred from test server instructions?
A test MQTT broker can be found at: http://test.mosquitto.org/. The website suggests trying the command:
mosquitto_sub -h test.mosquitto.org -t "#" -v
I believe that the "#" denote a wildcard for ...
- 1,532
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176
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Why does MQTT Mosquito attempt ot remove a package?
Context: OSMC distro on Raspberry Pi Zero-W. MQTT Mosquitto package installation failed.
Why would an attempt to:
sudo apt-get install mosquitto
trigger an attempt to remove an OSMC package?
The ...
- 1,532
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mosquitto_sub –d –t armtronix_mqtt Error: Unknown option '–d'
What information can be gleaned for corrective action to enable subscription to the example MQTT topic?
The goal is to reproduce the test (subscribe & publish), per the instruction's Step 3: an ...
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Raspbian default MQTT Server?
As I understand it, Raspbian (2019-04-08-raspbian-stretch-full.img) features Node-Red out of the box.
I have seen the youTube examples that show Node-Red configuring an MQTT server and left to wonder ...
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installing eclipse/paho.mqtt c++ client on Debian
I'm developing a C++ program (for a home IoT Project) on Debian 9 that needs to act as an MQTT client.
I found paho.mqtt would be helpful in this regard, but none of the on-line documentations to ...
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391
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Error compiling mosquitto_auth_plug
My config.mk file has the following settings:
# Select your backends from this list
BACKEND_CDB ?= no
BACKEND_MYSQL ?= no
BACKEND_SQLITE ?= no
BACKEND_REDIS ?= no
BACKEND_POSTGRES ?= yes
BACKEND_LDAP ...
- 155
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1
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4k
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Where is mosquitto source directory located?
I want to compile mosquitto-auth-plugin, which requires configuration of config.mk file, where one of the required parameter is to Specify the path to the Mosquitto sources MOSQUITTO_SRC =.Could you ...
- 155
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298
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I can't seem to configure persistence in MQTT
I am trying MQTT on my Raspberry Pi running Raspbian.
The basic setup works, but I can't seem to configure persistence.
Following https://tutorials-raspberrypi.com/raspberry-pi-mqtt-broker-client-...
- 1,408
2
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2
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2k
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MQTT as a variable on Bash?
Hi I want to try and convert a message receieved from MQTT into a variable so I can do an "IF script" using messages sent from a certain topic on mqtt.
I tried this at top of script but didn't work:
...
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2k
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mosquitto bruteforce fail2ban failregex
I am trying to write fail2ban filter to block bruteforcing IP addresses which are trying to subscribe to username/password protected mosquitto service by guessing username/password combinations.
On ...
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Bash Script: To log MQTT feed to txt file
I have written a small bash script (datalogger.sh) to store the mqtt data on to SD card inside a linux machine. The bash script is as below:-
#!/bin/bash
fileNumber=1
temp=1 // flag to check and ...
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313
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How to tunnel mqtt sub data to pure data (pd) in bash
mosquitto_sub -v -h 127.0.0.1 -p 1883 -t 'gyro' | sed 's/[^ ]* //' | pdsend 3000 localhost udp
this command doesn't output anything.
while it should output a value I receive over mqtt.
without sed 's/...
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1
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39k
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Restart mosquitto - Unknown operation mosquitto [closed]
I am running the mosquitto broker on arch linux x64.
I wanted to restart the mosquitto service by doing the following:
sudo systemctl mosquitto restart
But apparently I am prompted with
Unknown ...
- 193
2
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1
answer
1k
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Play and control multiple audio streams
I'm currently looking for some solution or advice. I need to play and control (yep, this is very important for me) many streams (probably from one source). For example.. my system plays some relax ...
- 191
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1
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2k
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Pipe demon output to a function
I'm receiving a MQTT message with mosquitto_sub and I want to redirect the output (two strings) to a function.
CLIENT:
mosquitto_pub -d -t hello/world/ -m "Alessio,base64"
On the server I have a ...
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