net-mqtt-sub - Perl script for subscribing to an MQTT topic

NAME

net−mqtt−sub − Perl script for subscribing to an MQTT topic

version 1.163170

net−mqtt−sub [options] topic1 [topic2] [topic3] ...

This script subscribes to one or more MQTT topics and prints any messages that it receives to stdout.

−help

Print a brief help message.

−man

Print the manual page.

−host

The host running the MQTT service. The default is 127.0.0.1.

−port

The port of the running MQTT service. The default is 1883.

−client−id

The client id to use in the connect message. The default is 'NetMQTTpm' followed by the process id of the process.

−verbose

Include more verbose output. Without this option the script only outputs errors and received messages one per line in the form:

topic message

With one −verbose options, publish messages are printed in a form of a summary of the header fields and the payload in hex dump and text form.

With two −verbose options, summaries are printed for all messages sent and received.

With three −verbose options, a hex dump of all data transmitted and received is printed.

−keepalive NNN

The keep alive timer value. Defaults to 120 seconds. For simplicity, it is also currently used as the connection/subscription timeout.

−count NNN

Read the specificed number of MQTT messages and then exit. Default is 0 − read forever.

−one or −1

Short for −count 1. Read one message and exit.

−username

Username to be used for authentication in the connection message.

−password

Password to be used for authentication in the connection message.