Why doesn't my template code work?

Configuration
1

I’m using this to get the value for entity “propane_tank_neevo_371”

command_line:
  - sensor:
      command: "curl -u <user>:<password> https://telematics.otodatanetwork.com:4432/v1.5/DataService.svc/GetAllDisplayPropaneDevices --header Content-Type:application/json"
      name: "Propane Tank Neevo 371"
      unique_id: propane_tank_371
      value_template: "{{ value_json[0].Level }}"
      scan_interval: 14400
      state_class: measurement

And this to convert it from percent of tank full to gallons:

  - sensor:
      - name: "Propane 371 Gallons"
        unit_of_measurement: "Gallons"
        state_class: measurement
        state: "{{ (states('sensor.propane_tank_neevo_371') |float(0)) * 2.40}}"

This works fine except that several times each day the curl command results in the entity’s value being 0 (I don’t know why).

So, I wanted to create some code that ignored any 0 value, and tried this:

template:
  - sensor:
      - name: "Propane 371 Gallons Test"
        unit_of_measurement: "Gallons"
        state_class: measurement
        state: >
          {% set s = states("sensor.propane_tank_neevo_371")|float(0) * 2.4 %}
          {% if  s = 0 %}
            100    
          {% else %}
            s

I just used “100” as a placeholder but even this code doesn’t work.

Can someone suggest a way to ignore any 0 percentage results from the curl command (better to ignore it at that stage than at the gallons entity creation stage?

Thank you.

2

Maybe something like?:

{{ value_json[0].Level if value_json[0].Level | float > 0 else states('sensor.propane_tank_371') }}

3

Wow! That looks great.

Do I understand correctly that this tests for value_json[0].level being greater than 0 (in which case, the value of sensor.propane_tank_neevo_371 gets the value of json[0], otherwise (else) it gets the value of sensor.propane_tank_371?

If so, where does sensor.propane_tank_371 come from?

I have the last recorded value but in gallons (not in percentage, which sensor.propane_tank_371 uses) in sensor.propane_371_gallons

Thank you.

4

You can do all this in the command line sensor. No need for other templates.

command_line:
  - sensor:
      command: "curl -u <user>:<password> https://telematics.otodatanetwork.com:4432/v1.5/DataService.svc/GetAllDisplayPropaneDevices --header Content-Type:application/json"
      name: "Propane Tank Neevo 371"
      unique_id: propane_tank_371
      value_template: "{{ value_json[0].Level|float(0) * 2.4 if value_json[0].Level is defined else this.state }}"
      scan_interval: 14400
      state_class: measurement
      unit_of_measurement: "Gallons"
5

It’s a recursive value lookup based on the last state of the sensor (states('sensor.propane_tank_371')).

tom_l’s suggestion is more complete and uses the this variable, which is safer for recursive lookups.

6

That is truly fabulous!

I tried to recreate this with a multiscrape-gotten sensor, but I don’t think it’s working.

Using this for multiscape:

multiscrape:
  # /homeassistant/multiscrape.yaml
  - resource: "https://www.myamerigas.com/eSign/[email protected]"
    name: Amerigas Scraper
    scan_interval: 43200
    timeout: 60
    headers:
      User-Agent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36"
      referer: "https://www.myamerigas.com/"
      origin: "https://www.myamerigas.com"
      host: "www.myamerigas.com"
    form_submit:
      submit_once: True
      resubmit_on_error: False
      resource: "https://www.myamerigas.com/Login/Login"
      select: "form[name='Login']"
      input:
        EmailAddress: "<USERNAME>"
        Password: "<PASSWORD>"
    sensor:
      - select: ".EstimatedTankDiv .lblvalue-Estimatedtank"
        name: Amerigas Tank Percentage Raw
        unique_id: multiscrape_amerigas_tank_percentage_raw_3420398

And this to create a gallons sensor:

template:
  -sensor:
      - name: "630 Amerigas Tank Percentage Gallons"
        state: >
          {% set value = states('sensor.multiscrape_amerigas_tank_percentage_raw_3420398') * 1.2 if sensor.multiscrape_amerigas_tank_percentage_raw_3420398 is defined else this.state  %}
          {{ value | replace('%', '') | int }}

Would you mind?

Thanks!

7

Sorry I don;t know anything about the multiscrape integration.

8

What is the value of the sensor after you restart HA? I’m using the same strategy to default to this.state but my sensor is set to unknown after restarting.