Command_line to curl

Configuration
1

Hi,
I am trying to get my 1-wire sensor on a ESP8266, that is showing the temperature on a html page.
In mrtg I used this one to graph the temperatur:
curl -s http://nodemcu1|grep -i Duschwasser|cut -c 17-18

So I did the same in the configuration.yaml:

sensor:

  • platform: command_line
    command: ‘curl -s http://nodemcu1 | grep -i Duschwasser | cut -c 17-18’
    name: Duschwasser Temperatur
    unit_of_measurement: “…C”

I used single quote, but it is not working.

I do not see the sensor in Devtools-Status and not anywhere else.

Not sure how to proceed.

Any idea?

Thanks!
Regards,
Miro

2
  1. Format your code according to rules - place a code into triple backquotes.
  2. This is an old syntax for command_line sensors, check Docs for a proper one.
3

When posting code to this forum, please be sure to format it properly.

This is the legacy configuration style. It may not be the source of your problem, but I suggest you update to the current standard which would look like this:

command_line:
  - sensor:
      name: Duschwasser Temperatur
      command: 'curl -s http://nodemcu1 | grep -i Duschwasser | cut -c 17-18'
      unit_of_measurement: "…C"

Did you restart HA after adding this to configuration.yaml? When adding a new platform you must restart – a quick reload will not load the new section.

You should check the log files for any errors or issues.

1 Like
4

Thanks for your help!

I have modified the sensor with your suggstion and it is still not working. But 1 step further…

Looking at the log, I can see :

ValueError: Sensor sensor.duschwasser_temperatur has device class ‘None’, state class ‘None’ unit ‘…C’ and suggested precision ‘None’ thus indicating it has a numeric value; however, it has the non-numeric value: ‘’ (<class ‘str’>)

  • home-assistant.log 50/50 100%

I am running home-assistant in a docker instance and the curl command works from the command line.

What is still wrong here?

Thanks a lot so far!

Best regards,
Miro

5

Comment “unit_of_measurement” and see what comes there…
Log says the value is not numerical.

6

Thanks!

Now it is showing the number.
image

Very strange, if I type the ° in the console it gives back the three dots. “…C”
Is this maybe a formating error or something.

Cheers,
Miro

7

Probably sometimes a value is not numerical - using with UoM causes an error.
You may process a value in template, check docs for command_line.

8

ok checking docs, thanks to all for Support!