REST sensor for checking power outages - too much data returned?

Configuration
1

Hi,
First time poster here. I’m a bit stuck and was just wanting to hopefully be pointed in the right direction please. I’m not 100% if there’s a limit on the amount of data that can be returned to the REST sensor or something else that may be stopping me. There’s a bit of text that follows, so I will thank any and all responses in advance - thanks!

I’m looking to be able to tell when a power outage is occurring by pointing to the supplier’s API (https://www.endeavourenergy.com.au/designs/connectors/outage-feeds/get-current-outage).

From there, I’d have a card on a dashboard that would populate with fields such as start time, end time, outage type, etc. when there’s an outage on, and otherwise return N/A when there’s no outage.

This API drops a lot of information - all of the outages, both planned and unplanned, across their supply network - into that page/API, and to me it appears to be JSON. The time of start/end is also in UTC.
Admittedly, I did enlist some assistance of ChatGPT, as I can’t do code etc. to save my life.
The street etc, used in the .yaml is an example of an active, unplanned outage.

I’ve saved the config as a YAML file at location: /config/packages/poweroutage.yaml, and configuration.yaml is set to read the packages directory as below.

homeassistant:
    packages: !include_dir_named packages

My poweroutage.yaml is:

sensor:
  - platform: rest
    resource: https://www.endeavourenergy.com.au/designs/connectors/outage-feeds/get-current-outage
    name: Power Outage
    value_template: "{{ value_json.status }}"
    json_attributes:
      - creationDateTime
      - endDateTime
      - incidentId
      - numberCustomerAffected
      - outageType
      - postcode
      - reason
      - startDateTime
      - status
      - streetName
      - suburb
      - longitude
      - latitude
    scan_interval: 300  # Set the update interval to 5 minutes

  - platform: template
    sensors:
      power_outage_my_address:
        friendly_name: "My Address Power Outage"
        value_template: >-
          {% set all_outages = states.sensor.power_outage.attributes %}
          {% set my_postcode = 2529 %}
          {% set my_street = 'WATERFRONT PROM' %}
          {% set my_suburb = 'SHELL COVE' %}
          {% set filtered_outages = [] %}
          {% for outage in all_outages %}
            {% if outage.postcode == my_postcode and outage.streetName == my_street and outage.suburb == my_suburb %}
              {% set filtered_outage = {
                'Outage Type': 'Unplanned' if outage.outageType == 'U' else 'Planned',
                'Start Time': as_timestamp(outage.startDateTime) | timestamp_custom('%Y-%m-%d %H:%M:%S', true),
                'End Time': as_timestamp(outage.endDateTime) | timestamp_custom('%Y-%m-%d %H:%M:%S', true) if outage.endDateTime is not none else "N/A",
                'Reason': outage.reason,
                'Status': outage.status
              } %}
              {% set filtered_outages = filtered_outages + [filtered_outage] %}
            {% endif %}
          {% endfor %}
          {{ filtered_outages | tojson }}
        entity_id: sensor.power_outage

The only attributes returned by the rest Sensor are below. Nothing else is, which is strange given the amount of data delivered by the API.

Attributes:
creationDateTime: 2023-10-22T04:18:53Z
endDateTime: 2023-10-16T03:00:00Z
incidentId: 46012092
numberCustomerAffected: 2
outageType: P
postcode: 2117
reason: MAINTENANCE WORK
startDateTime: 2023-10-15T21:00:00Z
status: OUTAGE COMPLETED
streetName: ARKANA ST
suburb: TELOPEA
longitude: 151.03577
latitude: -33.78882
friendly_name: Power Outage

2

The rest does not iterate over the sections so it will only show (I believe) the last one.
You could try to load the whole json in a attribute but HA will complain and it may not load all.
My suggestion, if applicable, is to filter the json to the values you want, e.g. postcode? and load that in an attribute. You can filter with jq and an example of that is here ( I can help if too daunting)
Below kicks back all 2529

command_line:
  - sensor:
    name: whatever
    command: >
      curl "https://www.endeavourenergy.com.au/designs/connectors/outage-feeds/get-current-outage" | jq '{data: [.[] | select(.postcode==2529)]}'
    value_template: > 
            {{ value_json.data | length }}
    json_attributes:
          - data