CODEWITHSUNDEEP
mqtt
Anil Sarode
Anil Sarode

Reputation: 301

How to use mosquitto_pub to publsih the topic/message with specific time interval on the mqtt server?

I am working on Raspberry Pi with os "Raspbian GNU/Linux 8 (jessie)".Now what i am trying is to send the simple message from my raspberry pi to the mqtt server which i have created on the "api.cloudmqtt.com". I am able to send (from raspberry pi to my server) and Receive (from server to my raspberry pi) with the following Commands

1.

pi@RevPi100102:~ $ mosquitto_pub -h "farmer.cloudmqtt.com" -p "18989" -u "obvrnnss" -P "xxxxxxxxx" -t "Test check" -m "Hello from RevPi"

2.

pi@RevPi100102:~ $ mosquitto_sub -h "farmer.cloudmqtt.com" -p "18989" -u "obvrnnss" -P "xxxxxxxxx" -t "Test check"

After this i tried to send the same message to server using the -r and for this i took help from link for mosquitto_pub 

pi@RevPi100102:~ $ mosquitto_pub -h "farmer.cloudmqtt.com" -p "18989" -u "obvrnnss" -P "xxxxxxxxxx" -t "Test check" -m "Hello from RevPi" -r --repeat-delay "2"

I am getting the following error,

Error: Unknown option '--repeat-delay'.

Can someone help me to find where i am going wrong and how to use the command -r and --repeat-delay.I am not expertise in Linux commands.

Upvotes: 0

Views: 2501

Answers (1)

hardillb
hardillb

Reputation: 59751

Firstly the -r flag is not the short version of --repeat or --repeat-delay

From the mosquitto_pub doc

-r, --retain

If retain is given, the message will be retained as a "last known good" value on the broker. See mqtt(7) for more information.

To get repeating messages you need to use the --repeat flag. This can then be combined with the --repeat-delay flag to set the time between each message being published.

Secondly, the repeat functionality is new, it was only added at version 1.6 of mosquitto. You not said what version you are using but if it is the default that ships with raspbian then it is unlikely you have this feature.

Upvotes: 1

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