Binary sensor template.... not show on front. what is wrong?

Configuration
1 
    i have a binary_sensor
- platform: mqtt
  state_topic: "home/433toMQTT"
  name: "Campainha"
  payload_on: "10340193"
  payload_off: "10340193off"
  sensor_class: sound

the entity id is: binary.sensor.campainha...

now i trying to use a template and i make this:
- platform: template 
  sensors:
    campainha:
      friendly_name: 'Campainha'
      sensor_class: 'sound'
      value_template: >-
          {%- if is_state("binary_sensor.campainha", "off")  -%}
          Ninguem está a tocar
          {%- else -%}
          Tocou
          {%- endif %}
      entity_id:
        - binary_sensor.campainha
          

but when binary.sensor.campainha is off or on not show me template on front.
what is wrong?
not should show Campainha-------------------------Ninguem esta a tocar.
or
                        Campainha-------------------------tocou

???
2

solved:

- platform: template
  sensors:
    campainha_escada:
      friendly_name: 'Campainha da Escada'
      value_template: > 
        {%- if is_state('binary_sensor.campainha', 'off') -%}
           Ninguem está a tocar
        {%- else -%}
           tocou
        {%- endif -%}