MQTT and JSON template

[Tomas Jan]

Hello All

I have question about template with JSON values

via MQTT I receive data like this:

{'type': 'temperatures', 'data': [{'name': 'bedroom', 'temp': 18.25}, {'name': 'bathroom', 'temp': 22.19}, {'name': 'kitchen', 'temp': 85.0}}

How to extract this values in MQTT template sensor. Can I use key name in template ?  These data are a random values order

I have checked like this without success:

value_template: {{ value_json.data.name['bedroom'].temp }}
value_template: {{ value_json.data.name[\'bedroom\'].temp }}

Second question is about configuration.yaml. Can I use multiple sensors from different topics like this ?

sensor:

  platform: mqtt

  state_topic: "mqtt_sensor"

    name: "bedroom sensor"

      unit_of_measurement: "°C"

      value_template: {{ value_json.data.name['bedroom'].temp }}

    name: "kichen sensor"

      unit_of_measurement: "°C"

      value_template: {{ value_json.data.name['kitchen'].temp }}

  state_topic: "mqtt_dispatcher"

    name: "sensor 1"

      unit_of_measurement: "%"

      value_template: {{ value_json.data.name['sensor 1'].temp }}

    name: "sensor 2"

      unit_of_measurement: "%"

      value_template: {{ value_json.data.name['sensor 2'].temp }}

[Paulus Schoutsen]

The problem here is that the key 'data' holds an array. Array indices can only be accessed through an index number. Try this instead:

value_json.data.0.temp

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