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

Note

This plugin is part of the community.general collection (version 3.8.3).

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.

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 (i.e. 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: no ← (default) yes
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.

Notes

Note

• This module requires a connection to an MQTT broker such as Mosquitto http://mosquitto.org and the Paho mqtt Python client (https://pypi.org/project/paho-mqtt/).

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)