I can't see the MQTT data in home Assistant

Configuration
1

Hello everyone
I do not know what I’m doing wrong.
Sensor created and data is not seen.

MQTT_No_Data
MQTT_No_Data982×244 10.8 KB

looks like an entity
Entidad
Entidad1325×61 2.69 KB

Node red data
Node_red
Config node
Node_Config
Connection with mosquitto brocker is OK
MQTT Explorer
Lines in configuration.yaml file

mqtt:
  sensor:
    - name: "Watios_RST"
      unique_id: energiacasa
      state_topic: "/nuc"
      unit_of_measurement: "W"
      value_template: "{{ value_json.wtotal }}"
2

Don’t use leading “/” on the topic. It is not a URL path and some applications can handle it and some can’t.

What is the green node on your NodeRed flow? Why aren’t you using the MQTT In node?

3

Thank you very much for the answer.
I have removed “/” and I still cannot see the data.
The W_RST node is the data read from a siemens automata, and I connect it to MQTT OUT to publish the value, with the idea of seeing it in HA-OS as a new sensor.
As a test I have used MQTT IN node to see that they work, and it works fine.

nodered_energia
nodered_energia1051×556 46 KB

The version of home assistant, Supervisor 2022.07.0
OS 8.4
I have also tried to pass this data to HA with the nodes of (node-red-contrib-home-assistant-websocket) but in HA_OS it asks me (Node-RED Companion Integration) and I have not been able to install it. But that is another story.
Again, many thanks for the help.