mosquitto_pub

publishes messages to an MQTT broker

TLDR

Publish message to topic

$ mosquitto_pub -t [topic] -m "[message]"

Publish to remote broker

$ mosquitto_pub -h [broker.example.com] -t [topic] -m "[message]"

Publish with authentication

$ mosquitto_pub -h [host] -u [user] -P [password] -t [topic] -m "[message]"

Publish file contents

$ mosquitto_pub -t [topic] -f [file.txt]

Publish with QoS

$ mosquitto_pub -t [topic] -m "[message]" -q [1]

Publish retained message

$ mosquitto_pub -t [topic] -m "[message]" -r

SYNOPSIS

mosquitto_pub [options]

DESCRIPTION

mosquitto_pub publishes messages to an MQTT broker. It's part of the Mosquitto package.
The tool sends single messages. Supports authentication, TLS, and various QoS levels.

PARAMETERS

-h HOST

MQTT broker hostname.

-t TOPIC

Topic to publish to.

-m MESSAGE

Message payload.

-u USER

Username.

-P PASSWORD

Password.

-q QOS

Quality of service (0, 1, 2).

-r

Retain message.

--help

Display help information.

CAVEATS

Part of mosquitto-clients. Requires broker access. Default QoS is 0.

HISTORY

mosquitto_pub is the publishing client distributed with the Eclipse Mosquitto MQTT broker.