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Tool for generating MQTT messages on various topics

Project description

For testing application and tools which are handling MQTT messages it’s often needed to send continuously messages on random topics to a broker. mqtt-randompub contains options to send a single message, a specific count of messages, or a constant flow of messages till the tool is terminated. Configuration files can be used to store lists of topics to create repeatable test scenarios.

Prerequisites/Installation

Get the files

Clone the mqtt-randompub repository:

git clone git@github.com:fabaff/mqtt-randompub.git

or use pip to make an installation.:

pip3 install mqtt-randompub --user

Dependencies

mqtt-randompub depends only on paho-mqtt . This module should be pulled in automatically when installed with pip.

On a Fedora system:

sudo dnf -y install python-paho-mqtt

Usage

To run mqtt-randompub just type:

$ mqtt-randompub -h
usage: mqtt-randompub [-h] [-c CONFIG] [-b BROKER] [-p PORT] [-q QOS]
                      [-t TOPIC] [-s SUBTOPIC1] [-d SUBTOPIC2] [-l LOAD]
                      [-i INTERVAL] [-n NUMBER]

optional arguments:
  -h, --help            show this help message and exit
  -c CONFIG, --config CONFIG
                        configuration file to use
  -b BROKER, --broker BROKER
                        set the broker
  -p PORT, --port PORT  set the proker port
  -q QOS, --qos QOS     set the QoS of the messages
  -t TOPIC, --topic TOPIC
                        set the main topic
  -s SUBTOPIC1, --subtopic1 SUBTOPIC1
                        set the first subtopic
  -d SUBTOPIC2, --subtopic2 SUBTOPIC2
                        set the second subtopic
  -l LOAD, --load LOAD  what to use as message payload
  -i INTERVAL, --interval INTERVAL
                        time in seconds between the messages
  -n NUMBER, --number NUMBER
                        number of messages to send. set to 0 for running

in a terminal to see all options. Running without any option will send a sample message to test/# to a broker which listens on localhost on port 1883.

For local testing run a MQTT broker/server on localhost.

  • mosca - A multi-transport MQTT broker for node.js (no longer maintained)
  • mosquitto - An Open Source MQTT v3.1 Broker

and subscribe to the topic test/# with a MQTT client. For example:

mosquitto_sub -h localhost -d -t test/#

You can run mqtt-randompub with a configuration file to re-use a previous set of topics. Check the mqtt-randompub.example file for details.

License

mqtt-randompub licensed under MIT, for more details check LICENSE.

Project details


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