Hi
I'm reading some data over MQTT but this topic reads the data every 5 minutes. I want to set that 5 minutes equal to an other device, is it possible to send a pulse to this node or something else?
MQTT uses a publish and subscribe model. So if the frequency of messages on subscribe (mqtt-in) is wrong, you need to go back to what is publishing the topic.
Do you mean this? If yes, then I already knew that but then it just send 1 en not the topic I want to know

No. What sends the topics you are currently receiving? You need to change that if you want it to send more often.