Simple MQTT debug helper

This is a simple tool that allows subscribing to an arbitrary number of MQTT topics as well as publishing to an MQTT broker using a command line utility.

Example usage

Configuration file

The configuration file that's sourced by both tools is supplied in JSON format:

{
	"broker" : {
		"broker" : "example.com",
		"port" : 1883
	},
	"auth" : {
		"user" : "exampleuser",
		"password" : "examplepassword"
	}
}

Subscribing to all topics

Dumping as plain text:

$ mqttsubscribe --cfg /path/to/configfile --topic "#"

Dumping as JSON:

$ mqttsubscribe --cfg /path/to/configfile --topic "#" --json

Subscribing to specific topics

$ mqttsubscribe --cfg /path/to/configfile --topic "quakesr/experiment/camera/ebeam/raw/stored" --json

Publishing a message from the CLI

$ mqttpublish --cfg /path/to/configfile --topic "examples/testtopic" --payload "Test payload"