MQTT Sensor Status

Configuration
1

Hi,

I’m trying to pull use the status of a parameter in a MQTT event, but I’m struggling. It’s the events from Frigate:

{
  "before": {
    "id": "1723929993.368527-ptvntr",
    "camera": "dahua",
    "frame_time": 1723937222.060817,
    "snapshot": {
      "frame_time": 1723929993.424929,
      "box": [
        456,
        144,
        854,
        554
      ],
      "area": 163180,
      "region": [
        164,
        0,
        1280,
        1116
      ],
      "score": 0.99609375,
      "attributes": []
    },
    "label": "car",
    "sub_label": null,
    "top_score": 0.99609375,
    "false_positive": false,
    "start_time": 1723929993.368527,
    "end_time": null,
    "score": 0.97265625,
    "box": [
      456,
      147,
      850,
      553
    ],
    "area": 159964,
    "ratio": 0.9704433497536946,
    "region": [
      381,
      75,
      929,
      623
    ],
    "stationary": true,
    "motionless_count": 72292,
    "position_changes": 0,
    "current_zones": [],
    "entered_zones": [],
    "has_clip": false,
    "has_snapshot": false,
    "attributes": {},
    "current_attributes": []
  },
  "after": {
    "id": "1723929993.368527-ptvntr",
    "camera": "dahua",
    "frame_time": 1723937282.209351,
    "snapshot": {
      "frame_time": 1723929993.424929,
      "box": [
        456,
        144,
        854,
        554
      ],
      "area": 163180,
      "region": [
        164,
        0,
        1280,
        1116
      ],
      "score": 0.99609375,
      "attributes": []
    },
    "label": "car",
    "sub_label": null,
    "top_score": 0.99609375,
    "false_positive": false,
    "start_time": 1723929993.368527,
    "end_time": null,
    "score": 0.97265625,
    "box": [
      461,
      147,
      849,
      553
    ],
    "area": 157528,
    "ratio": 0.9556650246305419,
    "region": [
      380,
      75,
      928,
      623
    ],
    "stationary": true,
    "motionless_count": 72894,
    "position_changes": 0,
    "current_zones": [],
    "entered_zones": [],
    "has_clip": false,
    "has_snapshot": false,
    "attributes": {},
    "current_attributes": []
  },
  "type": "update"
}

I’m trying to use after snapshot status. I have a sensor that displays the value which is as expected:

  - sensor:
      name: Dahua Snapshot Test
      state_topic: "frigate/events"
      value_template: |-
        {% if value_json['after']['camera'] == 'dahua' %}
          {{ value_json['after']['has_snapshot'] }}
        {% else %}
          {{ 'null' }}           
        {% endif %}

It returns false:

image

I can’t match the false with an if statement though. I’ve tried it all lowercase and with a capital F, but it just won’t match. The sensor just stays off.

  - binary_sensor:
      name: Dahua Snapshot Status
      off_delay: 10
      state_topic: "frigate/events"
      value_template: "{{ 'ON' if value_json['after']['has_snapshot'] == 'false' else 'OFF' }}"

image