This is embarassing that I have to ask this

ESPHome
1

So I know enough to be dangerous. I have an sep32 with some temp sensors connected. They are reporting just fine. I want to do some math with them. IE: I have a source temp for a hydronic heating system, I will have several temperatures that will be the return temperature from a hydronic loop. What I want is to subtract the return temp from the source temp and then show that result on a card. Can I do this in the ESPhome Yaml for my esp32?

Thanks

2

Try template

With lambda you can get the state of each sensor (by id) on the esp32

id(tempone).state

So doing something like this maybe?

sensor:
  - platform: template
    name: "Temperature"
    lambda: |-
      return (id(tempsource).state - id(tempreturn).state);
    update_interval: 5s
2 Likes
3

Thanks LCL That doesn’t look scary at all :)) I was expecting alot more.