Rest sensor error (cloudlfare)

Configuration
1

Can someone tell my why my restfull sensor give me this error:

restfull sensor configuration:

sensor:
#--------------------------------------------------------------------------------------
# cloudflare
#--------------------------------------------------------------------------------------
  - platform: rest
    resource: http://MYIP:8123/api/hassio/addons/9074a9fa_cloudflared/info
    name: cloudflare
    value_template: "{{ value_json.data.state }}"
    scan_interval: 
      minutes: 5
    headers:
      Authorization: 'Bearer  MYTOKEN'
      Content-Type: application/json

the error is:

Logger: homeassistant.helpers.template
Source: helpers/template.py:735
First occurred: 11:27:07 (3 occurrences)
Last logged: 11:29:07

Template variable error: ‘value_json’ is undefined when rendering ‘{{ value_json.data.state }}’

2

What is the response from that URL? Please paste as correctly-formatted code.

If you can’t work out how to get it, start with modifying the above to use:

    value_template: "{{ value[:240] }}"

which will show us the first 240 characters of the response, if the REST call is working.

3

Hello @Troon ,

I did the modification but I have no log out, so seems the rest call is not working… right?

4

If you reloaded REST sensors and that sensor either doesn’t exist or has no state, correct. Is there anything in the logs? (Settings / System / Logs)

I assume MYTOKEN is your actual token redacted, not just pasted from somewhere else?

5

The sensor has been created but without states.
Unfortunately I have no logs (just others warning logs from HA).
MYTOKEN is a long life token that I have created just for this rest sensor. I also try to make a new token and test again but no results.

6

Hey @Troon
may be this can helps?

2023-07-20 15:49:23.804 DEBUG (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=sensor.cloudflare, old_state=None, new_state=<state sensor.cloudflare=<!DOCTYPE html><html><head><title>Home Assistant</title><meta charset="utf-8"><link rel="manifest" href="/manifest.json" crossorigin="use-credentials"><link rel="icon" href="/static/icons/favicon.ico"><link rel="modulepreload" href="/fronte; friendly_name=cloudflare @ 2023-07-20T15:49:23.804106+02:00>>
7

Yes: the response is an HTML document, not a JSON document.

What information are you expecting to get from that URL? Where have you got the information on setting up this sensor?

8

The scope is to know if an addon (in this case cloudflare) is running.
Sometimes after a blackout , the addon is not able to restart correctly (the tunnel is already in use and the addon is not able to create the connection), so I would create an automation that restart the addon in this case.

9

Ok, so what does that URL return in the working and not-working states?

Where did your original value_template line come from?

10

Actually , I’m not so expert, I followed this example:

How to monitor if addon is started or not?.

But I think I’ll try another way.
I’m testing Uptime Kuma now and probaly I’ll be able to solve with this addon…
Thank you anyway for your support @Troon and have a great we.