How do I subscribe to all topics of a MQTT broker

mqtt mosquitto
Yugandhar Chaudhari picture Yugandhar Chaudhari · Oct 2, 2015 · Viewed 105.8k times · Source

I want to connect a client which will monitor all the topics of the broker to respond to the events when I don't know what are names of topic.

Answer

ralight picture ralight · Oct 2, 2015

Subscribing to # gives you a subscription to everything except for topics that start with a $ (these are normally control topics anyway).

It is better to know what you are subscribing to first though, of course, and note that some broker configurations may disallow subscribing to # explicitly.

Related questions

How to test the `Mosquitto` server?

I am new to Mosquitto and MQTT, I downloaded the Mosquitto server library but I do not know how to test it. Is there any way to test the Mosquitto server?

Read More
Stop the mosquitto (MQTT) broker from listening to a port using the command line

When I ran the Mosquitto (MQTT) broker for the first time there was no issue. But however from he second time when i ran it using default config I could not run the code successfully because of the following error: 1379497253: …

Read More
How do I set up my own MQTT Server with Mosquitto?

I am setting up a sensor network for my new diy home automation system and am running into a major roadblock. I am using OpenHAB as the "home base" for the system, and since it has an MQTT binding, I …

Read More