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Forums › Gadgets, robotics, home automation, electronics (including wearables) › Home Assistant, add offset to a sensor, help.
peejayw

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#303444 10-Feb-2023 19:37
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Back in Oct 21 I requested and received help on adding an offset to an ESP based temperature sensor. I have since replaced that sensor with an Aqara one and need to do the same thing with it.
One person mentioned using a template sensor to achieve this, something I have no knowledge of.
Can anyone point me to a resource that explains how to go about this?
Specifically, I need to take the air pressure value from the sensor and add 24 to it to convert it to a sea level value.
Thanks.




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hairy1
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  #3034789 10-Feb-2023 20:53
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Hey.

 

Maybe try something like this? Not tested...

 

 

 

template:
  - sensor:
      - name: "Airpressure"
        unit_of_measurement: hPa
        value_template: “{{states(‘sensor.yourpressurehere’)|float + 24 }}”




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peejayw

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  #3034790 10-Feb-2023 20:55
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Ok, will try it, thanks.




 I'm supposed to respect my elders, but it's getting harder and harder for me to find one now.

peejayw

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  #3035066 11-Feb-2023 15:57
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Thanks to @hairy1 I have made a template sensor to add a value of 24 to the airpressure data, thanks hairy1.

 

However, the data off the snsor shows with one decimal ie 1015.0 whereas I just want it as 1015.

 

I tried using round int but that doesnt work, any suggestions?

 

Here is the entry...

 

 

 outside_air_pressure:

 

        friendly_name: "Outside Air Pressure"

 

        unit_of_measurement: 'hPa'

 

        value_template:   "{{states('sensor.lumi_lumi_weather_pressure_3')|float + 24 | round|int }}"

 

Thanks.

 

 

 

 




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mattenz
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  #3035387 12-Feb-2023 15:17
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That looks good, I don't suppose you've forgotten to restart?

peejayw

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  #3035392 12-Feb-2023 15:24
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No, I have restarted a few times but the decimal place persists.




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eluSiveNZ
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  #3035465 12-Feb-2023 16:56
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Had a look at some of mine, I am using round(0) would this work ?

 

Also FYI, in checking it looks like Home Assistant has changed the way templating is done and this current template is now "legacy".

 

Looks like I also have some updating to do...

 
 
 
 

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peejayw

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  #3035494 12-Feb-2023 17:54
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Thanks, I tried round(0) but still the same.




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hairy1
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  #3035656 12-Feb-2023 21:58
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Sorry. Have been flying all weekend and just walked in the door.

 

Try this...

 

 

 

 value_template:   "{{states('sensor.lumi_lumi_weather_pressure_3')| round(0) + 24 }}"




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peejayw

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  #3035700 13-Feb-2023 07:07
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That gave me an odd result,  #994.0 994

 

?




 I'm supposed to respect my elders, but it's getting harder and harder for me to find one now.

peejayw

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  #3035706 13-Feb-2023 07:34
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Oops, my bad, forgot to comment out a line. That works perfectly now, thanks very much.




 I'm supposed to respect my elders, but it's getting harder and harder for me to find one now.

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