Multi rest sensors not updating

Configuration
1

Hello Everyone

I am currently stuck when trying to extract 3 values from the following API: https://aareguru.existenz.ch/v2018/current?city=bern

I am interested in the values “aare.temperature_prec”, “aare.flow” & “bueber.state”, which I would like to have as sensor and the sensors should be updated every 5 minutes.

My configuration looks like this:

sensor:
  - platform: rest
    name: aareguru
    resource: https://aareguru.existenz.ch/v2018/current?city=bern
    json_attributes:
      - aare
      - bueber
    value_template: 'OK'.
    scan_interval: 300


  - platform: template
    sensors:
      aare_temperature:
        friendly_name: Aare Temperature
        entity_id: aare.temp
        value_template: '{{ states.sensor.aareguru.attributes["aare"]["temperature_prec"] }'
        device_class: temperature
        unit_of_measurement: '°C
      aare_flow:
        friendly_name: Aare Flow
        entity_id: aare.flow
        value_template: '{{ states.sensor.aareguru.attributes["aare"]["flow"] }'
        unit_of_measurement: 'm³/s
      aare_bueber:
        friendly_name: Aare Bueber
        entity_id: aare.bueber
        value_template: '{{ states.sensor.aareguru.attributes["bueber"]["state"] }'

The sensors are displayed, but only updated when Home Assistant is started. Nothing happens after that.

Can anyone help me what the issue might be?

2

Does the rest sensor provide the configured attributes?
Check them in Dev Tools/states

Also you’re missing a curly bracket at the end of every value_template.

'{{ states.sensor.aareguru.attributes["bueber"]["state"] }'
                                                         ^

You can check the templates in Dev Tools/templates.

3

Thanks for the quick reply!

I’ve checked the entities under dev tools/states and they are all here. I also see the sensors under dev tools/templates. Everything seems right. It’s just not updating the newest value automatically. The missing curly brackets are in my configuration file. I think there was a problem while copying and formatting this post here. Any suggestions?

4

Template sensors only update if entities in the templates change the state.
They will not update with the rest sensor if no state changes.

5

Thank you for the hint. I was able to get it to work with the following automation.

automation:
- id: update_aare_sensors
  alias: "Update Aare Sensors"
  initial_state: 'on'
  trigger:
    - platform: time_pattern
      minutes: '/5'
  action:
    service: homeassistant.update_entity
    data:
      entity_id:
      - sensor.aare_temperature
      - sensor.aare_flow
      - sensor.aare_bueber
      - sensor.aareguru