MQTT¶

What is it?¶

MQTT (or Eclipse Mosquitto) is a lightweight messaging protocol that is designed for use in constrained devices and low-bandwidth, high-latency, or unreliable networks. It is commonly used in Internet of Things (IoT) devices/applications for efficient and reliable communication between devices.

Also, MQTT does not have a web interface, so you will need to use a client to interact with it.

Details
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1. Installation¶

sb install sandbox-mqtt

2. Setup¶

You can connect MQTT to Home Assistant and Node Red via docker hostname. Add the MQTT integration in Home Assistant and use mqtt as the hostname/Broker, and 1883 as the port. In Node Red, you can use the mqtt node to connect to the MQTT server.

While MQTT can be set up to use a username and password, it is not recommended to expose it to the internet. So by default, MQTT is not exposed to the internet, nor does it have a username and password.

To add a username and password, you will need to edit the mosquitto.conf file. You can find the file in the /opt/mqtt/config/ directory. You will need to add the following lines to the file:

mosquitto.conf

allow_anonymous false # (1)!
user <username> # (2)!
password <password> # (3)!

This line will disable anonymous access to the MQTT server. It is currently set to true by default.
This line will add a username to the MQTT server. Replace <username> with your desired username.
This line will add a password to the MQTT server. Replace <password> with your desired password.
Documentation: MQTT Docs