tldr/pages/common/mosquitto_sub.md

17 lines
738 B
Markdown

# mosquitto_sub
> A simple MQTT version 3.1.1 client that will subscribe to topics and print the messages that it receives.
> More information: <https://mosquitto.org/man/mosquitto_sub-1.html>.
- 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}}`
- Subscribe to all broker status messages publishing on `iot.eclipse.org` port `1885` and print published messages verbosely:
`mosquitto_sub -v -h "iot.eclipse.org" -p 1885 -t {{\$SYS/#}}`
- Subscribe to multiple topics matching a given pattern. (+ takes any metric name):
`mosquitto_sub -t {{sensors/machines/+/temperature/+}}`