MQTT Client

Bare-bones MQTT CLI for Mac and Linux.

This project is a personal learning exercise, for diving into MQTT internals and network programming. You can read more about my experience on my website.

Publish to a topic

mqtt pub -t hello/topic -a localhost:1883 -c clientId '{"hello": "world"}'

Usage: mqtt pub [-v] -t <topic> -a <address> -c <clientId> <message>
Options:
  -t, --topic <topic>           Specify the topic to publish to (required)
  -a, --address <address>       <host>[:<port>] address to connect to (required)
  -c, --client-id <client id>   Client identifier
  -v, --verbose                 Enable verbose output
  -h, --help                    Show this help message

Subscribe to a topic

mqtt sub -t hello/topic -a localhost:1883 -c clientId

Usage: mqtt sub [-v] -t <topic> -a <address> -c <clientId>
Options:
  -t, --topic <topic>           Specify the topic to publish to (required)
  -a, --address <address>       <host>[:<port>] address to connect to (required)
  -c, --client-id <client id>   Client identifier
  -v, --verbose                 Enable verbose output
  -h, --help                    Show this help message

Features

	Supported	Planned
MQTT3	x
MQTT5		x
QOS0	x
QOS1	x
QOS2		x
PUBLISH	x
SUBSCRIBE	x
Various CONNECT options		x
SSL		x

Related Projects

Here are some real-world MQTT clients to check out:

• MQTTX
• mosquitto_pub/sub