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How to send a variable with Mosquitto [message #1794704]

Wed, 05 September 2018 09:24

Daniel Usselmann

Messages: 1
Registered: September 2018

Junior Member

I try to publish a message from a beaglebone black to another via mosquitto. I wrote a script that should send the date to the other beaglebone. The script is accessed with a crontab.

#!/bin/bash
d=$(date)
mosquitto_pub -t test -m $d

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Re: How to send a variable with Mosquitto [message #1796401 is a reply to message #1794704]

Fri, 12 October 2018 12:22

Matthew Wawrzyniec

Messages: 4
Registered: October 2018

Junior Member

Daniel Usselmann wrote on Wed, 05 September 2018 09:24

I try to publish a message from a beaglebone black to another via mosquitto. I wrote a script that should send the date to the other beaglebone. The script is accessed with a crontab.
#!/bin/bash
d=$(date)
mosquitto_pub -t test -m $d

Did you subscribe to the message on the other machine? And it may not be necessary but you may want to include the host in you script: mosquitto_pub -h 192.168.1.1 -t test -m $d

The easiest way to check the connection is to open a terminal on both machines
On the first machine run:
mosquitto_sub -h 192.168.1.1 -t test

On the send machine run:
mosquitto_pub -h 192.168.1.1 -t test -m "hello other beaglebone"

just make sure you're replacing the ip with the ip of your mqtt server

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