mosquitto_sub:tldr:b396a
mosquitto_sub: Subscribe to the topic `sensors/temperature` information with Quality of Service (`QoS`) set to 1. (The default hostname is `localhost` and port 1883).
$ mosquitto_sub -t ${sensors-temperature} -q ${1}
try on your machine
The command mosquitto_sub is a command-line tool used to subscribe to topics in the MQTT (Message Queuing Telemetry Transport) protocol. MQTT is a lightweight publish-subscribe messaging protocol commonly used in IoT (Internet of Things) applications.
In the provided command:
mosquitto_subis the command to launch themosquitto_subtool.-t ${sensors-temperature}is an option that specifies the topic to subscribe to.${sensors-temperature}is a placeholder, and its actual value would be substituted with the desired topic when executing the command.-q ${1}is another option that specifies the quality of service for the subscription.${1}is another placeholder, which would be replaced with either 0, 1, or 2, representing different levels of QoS.
Overall, this command is used to subscribe to an MQTT topic related to sensors' temperature, with a specified quality of service level.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.