JSON target name extraction help

Configuration
1

My endpoint receives multiple JSON packets. Each from different temp sensors. I can’t change the way in which the endpoint receives this data.

Each specific JSON packet looks like this:

{
  "event": {
    "eventId": "c5rs364aa6gu3disj5ng",
    "targetName": "projects/c2utvmhgmd8000fkmo90/devices/bjeis9e7gpvg00cjoapg",
    "eventType": "temperature",
    "data": {
      "temperature": {
        "value": 45.9,
        "updateTime": "2021-10-26T08:50:24.504000Z",
        "samples": [
          {
            "value": 45.9,
            "sampleTime": "2021-10-26T08:50:24.504000Z"
          }
        ]
      }
    },
    "timestamp": "2021-10-26T08:50:24.504000Z"
  },
  "labels": {}
}

I can use in HA with success:

sensor:
      - name: "Water_Heater"
        state: "{{ trigger.json.event.data.temperature['value'] }}"
        unit_of_measurement: °C

However as each packet arrives I get sensor data from around 10 devices. I want to be able to filter based on the target name.

Can anybody please assist.

All help is appreciated.

2

I think you need to do something like:

    sensor:
      - name: "Water_Heater"
        state: >-
                  {% if trigger.json.event['TargetName']  == "projects/c2utvmhgmd8000fkmo90/devices/bjeis9e7gpvg00cjoapg" -%}
                         {{ trigger.json.event.data.temperature['value'] }}
                  {%- endif %}
        unit_of_measurement: °C

This means name has to be the above specified for it to set the value of this entity

3

thanks for looking at this much appreciated.

I have this in YAML:

    sensor:
      - name: "Water_Heater"
        state: >-
                  {% if trigger.json.event['targetName']  == "projects/c2utvmhgmd8000fkmo90/devices/bjeis9e7gpvg00cjoapg" -%}
                         {{ trigger.json.event.data.temperature['value'] }}
                  {%- endif %}
        unit_of_measurement: °C

And now I seem to be getting data from everything except the device in the if statement.

4

It’s not the history you’re looking at.
Before this change the same entity will keep the history of what it used to be.

But I just remembered that you probably need an else also.

{{ states(‘sensor.water_heater’) }}

Because otherwise it will probably return nothing/null/zero when it’s the wrong device and that is not what we want.

5

sorry bit of a noob when it comes to the syntax - something like this?

    sensor:
      - name: "Water_Heater"
        state: >-
                  {% if trigger.json.event['targetName']  == "projects/c2utvmhgmd8000fkmo90/devices/bjeis9e7gpvg00cjoapg" -%}
                         {{ trigger.json.event.data.temperature['value'] }}
                    {% else %}
                    {{ states(‘sensor.water_heater’) }}
                  {%- endif %}
        unit_of_measurement: °C
6

For those following on at home - This works perfectly:

    sensor:
      - name: "Water_Heater"
        state: >-
                  {% if trigger.json.event['targetName']  == "projects/c2utvmhgmd8000fkmo90/devices/bjeis9e7gpvg00cjoapg" -%}
                         {{ trigger.json.event.data.temperature['value'] }}
                    {% else %}
                        {{ states('sensor.water_heater') }}
                  {%- endif %}

Thank you @Hellis81 !!

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