community.general.mqtt module – Publish a message on an MQTT topic for the IoT

Note

This module is part of the community.general collection (version 9.5.1).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.general. You need further requirements to be able to use this module, see Requirements for details.

To use it in a playbook, specify: community.general.mqtt.

Synopsis

  • Publish a message on an MQTT topic.

Requirements

The below requirements are needed on the host that executes this module.

  • mosquitto

Parameters

Parameter

Comments

ca_cert

aliases: ca_certs

path

The path to the Certificate Authority certificate files that are to be treated as trusted by this client. If this is the only option given then the client will operate in a similar manner to a web browser. That is to say it will require the broker to have a certificate signed by the Certificate Authorities in ca_certs and will communicate using TLS v1, but will not attempt any form of authentication. This provides basic network encryption but may not be sufficient depending on how the broker is configured.

client_cert

aliases: certfile

path

The path pointing to the PEM encoded client certificate. If this is not None it will be used as client information for TLS based authentication. Support for this feature is broker dependent.

client_id

string

MQTT client identifier

If not specified, a value hostname + pid will be used.

client_key

aliases: keyfile

path

The path pointing to the PEM encoded client private key. If this is not None it will be used as client information for TLS based authentication. Support for this feature is broker dependent.

password

string

Password for username to authenticate against the broker.

payload

string / required

Payload. The special string "None" may be used to send a NULL (that is, empty) payload which is useful to simply notify with the topic or to clear previously retained messages.

port

integer

MQTT broker port number

Default: 1883

qos

string

QoS (Quality of Service)

Choices:

  • "0" ← (default)

  • "1"

  • "2"

retain

boolean

Setting this flag causes the broker to retain (i.e. keep) the message so that applications that subsequently subscribe to the topic can received the last retained message immediately.

Choices:

  • false ← (default)

  • true

server

string

MQTT broker address/name

Default: "localhost"

tls_version

string

Specifies the version of the SSL/TLS protocol to be used.

By default (if the python version supports it) the highest TLS version is detected. If unavailable, TLS v1 is used.

Choices:

  • "tlsv1.1"

  • "tlsv1.2"

topic

string / required

MQTT topic name

username

string

Username to authenticate against the broker.

Attributes

Attribute

Support

Description

check_mode

Support: full

Can run in check_mode and return changed status prediction without modifying target.

diff_mode

Support: none

Will return details on what has changed (or possibly needs changing in check_mode), when in diff mode.

Notes

Note

Examples

- name: Publish a message on an MQTT topic
  community.general.mqtt:
    topic: 'service/ansible/{{ ansible_hostname }}'
    payload: 'Hello at {{ ansible_date_time.iso8601 }}'
    qos: 0
    retain: false
    client_id: ans001
  delegate_to: localhost

Authors

  • Jan-Piet Mens (@jpmens)