Learning hass.io the hard way!

[sarishy (Samir El-Arishy)]

I decided to do everything manual…no discovery…etc
My postings will be short and sweat.
Here is #1
-Dmini01(Wemos) Tasmota DHT11 GPIO 14 The web page displays T & H …no problem here

• Rpi with stand alone MQTT. Tested and working
• HA Latest HassOS 2.12
• Tasmota publish reading (in JSON, see below) I subscribed +/Dmini01/+

Here is what MQTT spell out

11:39:54 MQT: tele/D1mini01/SENSOR = {“Time”:“2019-06-04T11:39:54”,“DHT11”:{“Temperature”:28.0,“Humidity”:29.0},“TempUnit”:“C”}

MY QUESTION:

If I go to in HA to services and select mqtt.publish How I get HA display only temperature
i.e. How do I Publish a message to an MQTT topic based on the JSON above

[sarishy (Samir El-Arishy)]

this did not work !!!
{“payload”: “{{ value_json.DHT11.Temperature }}”, “topic”: “tele/D1mini01/SENSOR”}

[Bieniu (Maciek)]

You have to use MQTT sensor component, not mqtt.publish service.

MQTT Sensor

[sarishy (Samir El-Arishy)]

Thanks for the redirection…!!!
Here what I did
sensor:

• platform: mqtt
  name: “DHT11”
  state_topic: “tele/D1mini01/SENSOR”
  unit_of_measurement: ‘C’
  value_template: “{{ value_json.DHT11.Temperature }}”
  availability_topic: “tele/D1mini01/SENSOR”
  payload_available: “online”
  payload_not_available: “offline”
  json_attributes_topic: “tele/D1mini01/SENSOR/attributes”

can you please edit it (refere to the mqtt json)

[Bieniu (Maciek)]

value_template: "{{ value_json['DHT11'].Temperature }}"

[sarishy (Samir El-Arishy)]

@Bieniu

“{{ value_json[‘DHT11’].Temperature }}”

Thank you for taking the time …

[123 (Taras)]

These two are functionally equivalent:

{{ value_json.DHT11.Temperature }}
{{ value_json['DHT11'].Temperature }}

You can prove it to yourself by pasting the following lines into the Template Editor:

{% set value_json = {"Time":"2019-06-04T11:39:54","DHT11":{"Temperature":28.0,"Humidity":29.0},"TempUnit":"C"} %}

{{ value_json.DHT11.Temperature }}
{{ value_json['DHT11'].Temperature }}

Both forms will produce the same result:

[sarishy (Samir El-Arishy)]

You are right …both have their use. I guess the “array” one is better if you have several values to extract.

[123 (Taras)]

@sarishy

I guess the “array” one is better if you have several values to extract.

I’m not sure what you mean by that but if it’s this:

{{ value_json['DHT11', 'DHT12'].Temperature }}

then, no, that’s invalid.

What it’s useful for is if the key word contains one or more spaces.

For example, let’s say it is this:
DHT 11
instead of:
DHT11
Then this will work:

{{ value_json['DHT 11'].Temperature }}

whereas this will fail:

{{ value_json.DHT 11.Temperature }}

[sarishy (Samir El-Arishy)]

@123

it’s useful for is if the key word contains one or more spaces

You are right again…my guess was affected by the use of for arrays in other languages !!
Your explanation is very clear and I appreciate your diligence…
There is no “indices” , it is dictionary type arguments.