mirror of https://github.com/CrimsonTome/tldr.git
28 lines
1.4 KiB
Markdown
28 lines
1.4 KiB
Markdown
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# mosquitto_pub
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> A simple MQTT version 3.1.1 client that will publish a single message on a topic and exit.
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- Publish a temperature value of 32 on the topic `sensors/temperature` to 192.168.1.1 (defaults to `localhost`) with Quality of Service (`QoS`) set to 1:
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`mosquitto_pub -h {{192.168.1.1}} -t {{sensors/temperature}} -m {{32}} -q {{1}}`
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- Publish timestamp and temperature data on the topic `sensors/temperature` to a remote host on a non-standard port:
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`mosquitto_pub -h {{192.168.1.1}} -p {{1885}} -t {{sensors/temperature}} -m {{"1266193804 32"}}`
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- Publish light switch status and retain the message on the topic `switches/kitchen_lights/status` to a remote host because there may be a long period of time between light switch events:
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`mosquitto_pub -r -h {{"iot.eclipse.org"}} -t {{switches/kitchen_lights/status}} -m {{"on"}}`
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- Send the contents of a file (`data.txt`) as a message and publish it to `sensors/temperature` topic:
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`mosquitto_pub -t {{sensors/temperature}} -f {{data.txt}}`
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- Send the contents of a file (`data.txt`), by reading from `stdin` and send the entire input as a message and publish it to `sensors/temperature` topic:
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`mosquitto_pub -t {{sensors/temperature}} -s < {{data.txt}}`
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- Read newline delimited data from `stdin` as a message and publish it to `sensors/temperature` topic:
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`{{echo data.txt}} | mosquitto_pub -t {{sensors/temperature}} -l`
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