Relay triggering with physical potentiometer and dht sensor

Configuration
1

Hello;
I just joined the homeasistant family and am stuck in automation. What I want to do is to trigger the relay if the potentiometer data is lower than the dht data. If it is larger than dht data, it will close. I can’t understand syntax operations. Please don’t laugh, I’m just getting started…
thank you:)

2

Welcome to the HA world!

Here is a rough start for you:


alias: relay control
trigger:
  - platform: numeric_state
    entity_id: sensor.POTENTIOMETER
    below: sensor.DHT
    id: 'below'
  - platform: numeric_state
    entity_id: sensor.POTENTIOMETER
    above: sensor.DHT
    id: 'above'
action:
  - choose:
      - conditions:
          condition: trigger
          id: 'below'
        sequence:
          - service: switch.turn_off
            entity_id: switch.RELAY
      - conditions:
          condition: trigger
          id: 'above'
        sequence:
          - service: switch.turn_on
            entity_id: switch.RELAY

Change the entity ID’s I left in UPPERCASE to your actual ones (use lowercase).

Another way could be:

alias: relay control
trigger:
  - platform: numeric_state
    entity_id: sensor.POTENTIOMETER
action:
  - service: >
      switch.turn_{{'off' if states('sensor.POTENTIOMETER') <= states('sensor.DHT')  else 'on'}}
    entity_id: switch.RELAY
3

hello spark;
I am grateful to you for your answer. I didn’t believe it when my friends who used home assistants said that the community helped. You have renewed my faith :slight_smile:

By the way, which ymal file will I add them to?

4

would that be effective, dave?
If it’s effective, I’d like to base the logic on it.

5

Hang on… I’m just updating my post because I thought of a different way to do it… hold tight while I fix all the copy / paste mess!

6

Hopefully my edit is correct now… The first version uses ‘simple’ automation code (easy to read and understand what is going on) whereas the second one uses a template which is (in my mind) more difficult to do. This template is fairly easy but some templates are crazy and I always need help to get them working.

7

dear dave;
Where or in which ymal file will I write this automation code? by the way i declare you hassio my best friend for helping me when i was just getting started :slight_smile:

8

You can actually do these via the automations editor GUI. That would be easiest for a beginner

9

Thank’s dave