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mosquitto_pub:tldr:d51af
This command is using the mosquitto_pub
tool, which is a command-line utility for publishing messages to an MQTT broker. Here is the breakdown of each part:
-
mosquitto_pub
: This is the command to invoke themosquitto_pub
tool. -
-h ${192-168-1-1}
: This flag specifies the MQTT broker's hostname or IP address that the command will connect to. In this case, it is trying to connect to an MQTT broker with the hostname or IP address192.168.1.1
. Note that the syntax${}
implies that the value within should be substituted. -
-t ${sensors-temperature}
: This flag specifies the topic that the message will be published to. The value here issensors-temperature
. Again, the${}
implies a substitution. -
-m ${32}
: This flag specifies the message payload that will be sent to the MQTT broker. The value here is32
, representing the sensor's temperature. The payload can be any string or data that you want to send as a message. -
-q ${1}
: This flag specifies the quality of service (QoS) level for the message. The value here is1
, which indicates QoS level 1. QoS 1 ensures that the message is delivered at least once, providing reliability, but it may be delivered multiple times in case of network disruptions.
Overall, this command is publishing a message with the payload 32
to the topic sensors-temperature
on an MQTT broker located at 192.168.1.1
using QoS level 1.