Send multi topic mqtt

General
1

Hi,

how to make mqtt topic submission simpler
if preset 1 is on then preset 2,3,4 is off
if preset 2 is on then preset 1,3,4 is off
etc.

image
image1548×417 151 KB

image send preset 1

image
image1526×381 149 KB

image send preset 2

thanks

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2

You could use a function node where you only inject the preset number you want to toggle and it will produce all the topics

const presetInput = msg.payload
const totalPresets = 4

for(let p = 1; p<=totalPresets;p++){
  const topic = 'mqtt/stat/preset/'+p
  let state = 'off'
  if(p == presetInput){
    state = 'on'
  }

  node.send({topic, payload:state})
}

return null

Replace the debug node with an mqtt node and leave the topic empty:

image
image1776×648 59.6 KB

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3

Hi bakman2,

thank you for the reply and working well.

4

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