求助帖：各位大佬如何配置yaml，才能解析复杂JSON值

wupeng

各位大佬大家好，最近一直在配置yaml对接MQTT传感器，看了很多官方的文档但是遇到一个困难
在读取简单结构的JSON时，可以直接value_json.XXX 官方的文档如下。

https://www.home-assistant.io/integrations/sensor.mqtt/

{
    "ClientName": <string>,
    "IP": <string>,
    "MAC": <string>,
    "RSSI": <string>,</font>
    "HostName": <string>,
    "ConnectedSSID": <string>
}

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使用直接取值的格式：value_json.XXX

# Example configuration.yaml entry
mqtt:
   sensor:
   - name: "RSSI"
     state_topic: "home/sensor1/infojson"
     unit_of_measurement: "dBm"
    value_template: "{{ value_json.RSSI }}"</font>
     availability:
        - topic: "home/sensor1/status"
      payload_available: "online"
      payload_not_available: "offline"
      json_attributes_topic: "home/sensor1/attributes"

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获取嵌套的JSON时，

{
    "Timer1": {
              "Arm": <status>,</font>
              "Time": <time>
              },
    "Timer2": {
            "Arm": <status>,</font>
            "Time": <time>
             }
}

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使用取值并嵌套的模式：value_json.XXX.XXX

# Example configuration.yaml entry
mqtt:
  sensor:
      - name: "Timer 1"
          state_topic: "tele/sonoff/sensor"
          value_template: "{{ value_json.Timer1.Arm }}"</font>
          son_attributes_topic: "tele/sonoff/sensor"
          json_attributes_template: "{{ value_json.Timer1 | tojson }}"

    - name: "Timer 2"
      state_topic: "tele/sonoff/sensor"
      value_template: "{{ value_json.Timer2.Arm }}"</font>
      json_attributes_topic: "tele/sonoff/sensor"
      json_attributes_template: "{{ value_json.Timer2 | tojson }}"

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但是如果遇到复杂的JSON，多层嵌套并含有数组时，该如何配置文件读取深层嵌套的值
value_template: "{{?????????}}"
例如：如何配置value_template能够取到下列meter数组中嵌套的，两个Uab值。

{
     "time": "2024-12-24 14:20:00",
    "sequence": "38",
    "source": "da",
    "meter": [
      
                      {
                           "id": "1",
                           "status": "1",
                           "values": {
                                            "Uab": "220.000000",</font>
                                             "Ia": "0.000000",
                                             "P": "0.000000"
                                         }
                       },
                      {
                           "id": "2",
                           "status": "2",
                           "name": "VrtDev1",
                           "values": {
                                            "Uab": "220.000000",</font>
                                             "Ia": "0.000000",
                                             "P": "0.000000"
                                           }
                       }
      
             ]
  }

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翻阅了很多文档和资料都是针对简单JSON的配置，实在没办法发帖求助。
希望配置过的朋友能够指点迷津。

jjcs

用nodered