Json extraction and Developer Tools - Template Editor - UKNOWN

Configuration
1

Hi guys,

I am trying to extract certain information from JSON file.

Then testing data with Template Editor i get the right values

{% set value_json = {

  "device_summary": {
    "details": [
      {
        "dig": "team",
        "ver": "0.8.0"
      }
    ]
  },
  "device_stats": {
    "details": [
      {
        "dig": "team2",
        "what": "gold",
        "metal": "iron",

        "fans": [
          34,
          31,
          44,
          36,
          40
        ]
      }
    ]
  },
  "notes": "none"
}
 %}

From {{ value_json }} I get
{‘device_summary’: {‘details’: [{‘dig’: ‘team’, ‘ver’: ‘0.8.0’}]}, ‘device_stats’: {‘details’: [{‘dig’: ‘team2’, ‘what’: ‘gold’, ‘metal’: ‘iron’, ‘fans’: [34, 31, 44, 36, 40]}]}, ‘notes’: ‘none’}

From {{ value_json.device_stats.details[0].fans }} I get [34, 31, 44, 36, 40]
From {{ value_json.device_stats.details[0].fans[0] }} I get 34

But when I configure sensor I get state UNKNOWN - rather then 34

  - platform: rest
    name: Fans percentage
    resource: https://xxx.xxx.xxx.xxx
    method: GET
    headers:
      Authorization: Bearer **TOKEN**
    value_template: ' {{  value_json.device_stats.details[0].fans[0]  }} '
    unit_of_measurement: "%" 
    scan_interval: 30

Any help with understanding why is this happening would be much appreciated.

2

What you put in the template editor is not JSON.

What do you actually get from the REST sensor without using value_template?

3

I am not getting any values, sensor is not even showing in Dev Tools. Error message in the log files saying it’s over 255 characters.

When I run Shell command

curl -X GET "https://xxx.xxx.xxx.xxx" -H  "accept: application/json" -H  "Authorization: Bearer **TOKEN**" | jq  '.device_stats.details[0].fans[0]'

I get the right value of 34

Thank you

4

Hmm, interesting.

You could enable debug for homeassistant.components.rest and then there might be useful info in home-assistant.log.

5

Thank you - will try that - good idea :slight_smile:

6

Thank you for pointing me in the right direction ! I had a typo in URL !!!

Much appreciated

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