Hello I am looking for a function so the flow of messages will only be allowed when a mqtt status is revived,but been able to have control independently of one example input - mqtt - cmd heater on input - mqtt - cmd pump on input to alow traffic of heater to be sent and is always checking input - stat pump power on in an electrical system it is called a relay the coil would be the stat msg Thank you chris [image]

nothing in message ialso need this for a automatic dimming on dusk dawn for zwave lighting too

go it mate thankyou ill have a look

Check again. I updated. I recommend looking over the example until you fully understand what's going on before adding complexity. Ask questions as you go if anything is stumping you.

i get how its changing but i dont understand how it alows the other mqtt topic to turn on topic heater topic pump?

The flow i gave isn't doing anything with mqtt yet. The cluster of nodes at top set the gate for the switch node. The switch node simply routes traffic to either the top or bottom output. That traffic can either be passed elsewhere, or used to trigger other events.

[image] Zwave day night auto dimming with times and max brightness hassio Share Your Projects Hello have a look and see what you all think if someone could do the join node better but it works, also anyway of simplifying it i have 24 ways to do on these [{"id":"b84a7f9a.24408","type":"server-events","z":"cf1115c.2dcd6e8","name":"HA All Events","server":"d0be6c93.2903a","x":110,"y":140,"wires":[["fd7c9ec6.5f502"]]},{"id":"29e7db9a.11e0a4","type":"function","z":"cf1115c.2dcd6e8","name":"Brightness Value","func":"var temp=msg.payload.event.new_state.attributes.brightness;\nvar msg = {pay… still havent got the relay tho :tired_face:

[image] chris1988: still havent got the relay tho :tired_face: How do the flows/ideas submitted by Simon and Jay not provide you a solution?

i cant see it sorry for not getting it is the 2 message payloads been put unto one message? cant see how 2 different message payloads are been controlled or stopped how does it know what state the flow relay is ? when the message is heater nothing in message contains relay on or off or false true but and also the message will be at different times never at same time? hope you can make me see sense :frowning: Thank you chris

https://nodered.org/docs/user-guide/context In summary, each tab has its own store of variables referred to as its "context." Say you want there to be a variable called "heater": if you set flow.heater to a value (let's say we set it to "true" fow now) then node-red stores a value called flow.heater as "true." Any node that evaluates for "flow.heater" looks at the value currently stored in that space and acts accordingly. Those two strings of nodes don't need to be connected. One sets the variable in the flow context. The other looks at the value in the flow context to decide where to route traffic.

ok could u do a flow showing me please, when you get chance I sort of understand

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Looking for a relay switch function

General

chris1988 15 September 2018 01:43 16

still havent got the relay tho

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Looking for a relay switch function

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