home-assistant.io/source/_integrations/mqtt.markdown

title	description	ha_category	featured	ha_release	ha_iot_class	ha_config_flow	ha_codeowners	ha_domain	ha_platforms	ha_integration_type
MQTT	Instructions on how to setup MQTT within Home Assistant.	Hub	true	pre 0.7	Local Push	true	@emontnemery	mqtt	alarm_control_panel binary_sensor button camera climate cover diagnostics fan humidifier lock number scene select sensor siren switch	integration

MQTT (aka MQ Telemetry Transport) is a machine-to-machine or "Internet of Things" connectivity protocol on top of TCP/IP. It allows extremely lightweight publish/subscribe messaging transport.

Your first step to get MQTT and Home Assistant working is to choose a broker.

{% include integrations/config_flow.md %}

Advanced broker configuration

Some broker configuration options can't be set via the user interface, but require changes of your configuration.yaml file. This includes configuring SSL certificate options.

Additional features

• Certificate
• Discovery
• Publish & Dump services
• Birth and last will messages
• Testing your setup
• Logging

Event event_mqtt_reloaded

Event event_mqtt_reloaded is fired when Manually configured MQTT entities have been reloaded and entities thus might have changed.

This event has no additional data.