Mosquitto MQTT broker#

The simpleswitch-mosquitto offers a demo of MQTT. By default the broker will handle requests on port 1883 and websocket requests on port 8883.

Registration

If you want to test SimpleCore™, SimpleSwitch™ or any of our packages from our SimpleCore™ incubator program, please register here and we will grant you access.

How to get it#

container-helper
Scotty
Bitbake

    ## From the base image run
    $ skopeo login ghcr.io
    $ export machine=$CONTAINER_HELPER_ARCH
    $ export package=simpleswitch-mosquitto
    $ export tag=$RELEASE_VERSION
    $ container-helper registry-install ghcr.io ghcr.io/avnet-embedded/simpleswitch/${machine}/${package}:${tag}
    $ simpleswitch-helper start ${package}

    ## On your computer run
    $ scotty build simpleswitch-mosquitto

    ## On your computer run
    $ bitbake simpleswitch-mosquitto

Note

This recipe needs meta-networking in the layer setup, if you want to build it yourself.

Scotty
Bitbake

    ## On your computer run
    $ scotty setup --features-layers-set simpleswitch

    ## On your computer run
    $ bitbake-layers add-layer <path to meta-networking>

Manually publish a message#

Sometimes it might be needed to manually publish a MQTT message. For this the simpleswitch-mosquitto package does offer the tool mosquitto_pub.

To publish a message run

$ simpleswitch-helper run simpleswitch-mosquitto mosquitto_pub -t "<topic>" -m "<message>"

e.g.

$ simpleswitch-helper run simpleswitch-mosquitto mosquitto_pub -t "foo/bar" -m "1"

Check published messages#

To check the messages published by other entities use mosquitto_sub, which is available out of the same SimpleSwitch™ container.

e.g.

$ simpleswitch-helper run simpleswitch-mosquitto mosquitto_sub -t "#"

will print every message published on this broker. You can adjust the -t parameter if you only want to see specific topics

MQTTX-Web#

You can also try our MQTTX-Web SimpleSwitch™ package, which provides you a browser based application to interact with the Mosquitto MQTT broker.