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Eclipse Mosquitto
Mosquitto is an open source implementation of a server for version 5.0, 3.1.1,
and 3.1 of the MQTT protocol. It also includes a C and C++ client library, and
the mosquitto_pub and mosquitto_sub utilities for publishing and
subscribing.
Links
See the following links for more information on MQTT:
- Community page: http://mqtt.org/
- MQTT v3.1.1 standard: https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html
- MQTT v5.0 standard: https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html
Mosquitto project information is available at the following locations:
- Main homepage: https://mosquitto.org/
- Find existing bugs or submit a new bug: https://github.com/eclipse/mosquitto/issues
- Source code repository: https://github.com/eclipse/mosquitto
There is also a public test server available at https://test.mosquitto.org/
Installing
See https://mosquitto.org/download/ for details on installing binaries for various platforms.
Quick start
If you have installed a binary package the broker should have been started automatically. If not, it can be started with a basic configuration:
mosquitto
Then use mosquitto_sub to subscribe to a topic:
mosquitto_sub -t 'test/topic' -v
And to publish a message:
mosquitto_pub -t 'test/topic' -m 'hello world'
Documentation
Documentation for the broker, clients and client library API can be found in
the man pages, which are available online at https://mosquitto.org/man/. There
are also pages with an introduction to the features of MQTT, the
mosquitto_passwd utility for dealing with username/passwords, and a
description of the configuration file options available for the broker.
Detailed client library API documentation can be found at https://mosquitto.org/api/
Building from source
To build from source the recommended route for end users is to download the archive from https://mosquitto.org/download/.
On Windows and Mac, use cmake to build. On other platforms, just run make
to build. For Windows, see also README-windows.md.
If you are building from the git repository then the documentation will not
already be built. Use make binary to skip building the man pages, or install
docbook-xsl on Debian/Ubuntu systems.
Build Dependencies
- c-ares (libc-ares-dev on Debian based systems) - only when compiled with
make WITH_SRV=yes - libwebsockets (libwebsockets-dev) - enable with
make WITH_WEBSOCKETS=yes - openssl (libssl-dev on Debian based systems) - disable with
make WITH_TLS=no - xsltproc (xsltproc and docbook-xsl on Debian based systems) - only needed when building from git sources - disable with
make WITH_DOCS=no - uthash / utlist - bundled versions of these headers are provided, disable their use with
make WITH_BUNDLED_DEPS=no - cJSON - for client JSON output support. Disable with
make WITH_CJSON=noAuto detected with CMake.
Equivalent options for enabling/disabling features are available when using the CMake build.
Credits
Mosquitto was written by Roger Light roger@atchoo.org
Master: 
Develop: 
Fixes: 