mqtt - Publish a message on an MQTT topic for the IoT

Synopsis

  • Publish a message on an MQTT topic.

Requirements

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

  • mosquitto

Parameters

Parameter Choices/Defaults Comments
ca_certs
(added in 2.3)
 Default:
None
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.
certfile
(added in 2.3)
 Default:
None
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 Default:
hostname + pid
MQTT client identifier
keyfile
(added in 2.3)
 Default:
None
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
Password for username to authenticate against the broker.
payload
required
 Default:
None
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 Default:
1883
MQTT broker port number
qos
    Choices:
  • 0
  • 1
  • 2
Default:
0
QoS (Quality of Service)
retain Default:
no
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.
server Default:
localhost
MQTT broker address/name
topic
required
 Default:
None
MQTT topic name
username
Username to authenticate against the broker.

Notes

Note

Examples

- mqtt:
    topic: 'service/ansible/{{ ansible_hostname }}'
    payload: 'Hello at {{ ansible_date_time.iso8601 }}'
    qos: 0
    retain: False
    client_id: ans001
  delegate_to: localhost

Status

This module is flagged as preview which means that it is not guaranteed to have a backwards compatible interface.

Author

  • Jan-Piet Mens (@jpmens)

Hint

If you notice any issues in this documentation you can edit this document to improve it.

© 2012–2018 Michael DeHaan
© 2018–2019 Red Hat, Inc.
Licensed under the GNU General Public License version 3.
https://docs.ansible.com/ansible/2.5/modules/mqtt_module.html