Timer - on for x min every hour

Third party integrations Node-RED
1

Hi,

I am quite new in this automation. How could I make a timer that would turn on a fan for e.g. 2min every hour. Fan is plugged in the relay thought ESP32.
Or should I make this outside the node-red?

Thanks!

2

Maybe not very sophisticated but why not use the ootb Automations?
Actions:

  • start with a ‘repeat while’ and add conditions when the repeat has to take place
  • turn on vent
  • wait 2 mins
  • turn of vent
  • wait 58 mins
3

inject node can be “scheduled”. So either one repeated every hour with a two minute delay or have two injects that is offset with the number of minutes (not sure that is possible though)

4

Just put it on the esp. Use the interval component.

interval:
  - interval: 60min
    then:
      - switch.turn_on: fan
      - delay: 2min
      - switch.turn_off: fan
1 Like
5

Thank you for the ideas. I went with inject node in node-red with interval and then trigger function that can send string “on” for a period of time (20s) and then send string “off”.

It would be great if I could control the trigger function time period from the dashboard slider. Any Idea on how to achieve that?

6

You can use the delay node with variable length.
Set a helper with the length and use the current state node to get the value, use this value as the delay in delay node.

7

Something like this:

[{"id":"29f7cde1488a0cbe","type":"delay","z":"4f357a5f.1c8d34","name":"","pauseType":"delayv","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"allowrate":false,"outputs":1,"x":680,"y":2280,"wires":[[]]},{"id":"23c1888b3995986f","type":"function","z":"4f357a5f.1c8d34","name":"","func":"msg.delay = msg.payload * 1000;\n\nreturn msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":540,"y":2280,"wires":[["29f7cde1488a0cbe"]]},{"id":"e9e1f51533f4430d","type":"api-current-state","z":"4f357a5f.1c8d34","name":"input number","server":"4bbca37b.1700ec","version":2,"outputs":1,"halt_if":"","halt_if_type":"str","halt_if_compare":"is","entity_id":"input_number.YOUR_ENTITY","state_type":"str","blockInputOverrides":false,"outputProperties":[{"property":"payload","propertyType":"msg","value":"","valueType":"entityState"},{"property":"data","propertyType":"msg","value":"","valueType":"entity"}],"x":390,"y":2280,"wires":[["23c1888b3995986f"]]},{"id":"4bbca37b.1700ec","type":"server","name":"Home Assistant","version":1,"legacy":false,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true}]

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