Unable to convert a float in mqtt.publish string ..[solved]

1

Hello anyone, please can you help me i am the searching the whole day for sent an temperature C as an mqtt. message
How must i convert this? i want send float KompressorT with mqtt. i know i need an .toString or else
you see i have tested something ( in ### )

dallas:
  - pin: GPIO3
    update_interval: 5s
    
# Individual sensors
sensor:
  - platform: dallas
    address: 0xFF00000534CF9228
    resolution: 11
    id: KompressorT
    name: "Kompressor Temperatur"
    on_value:
      then:
      - mqtt.publish:
           topic: Lager/temperature
           payload: !lambda |- 
            return KompressorT.state;
          

#      - mqtt.publish:
#          topic: some/topic2
#          payload: !lambda |- 
#            return std::to_string(my_global_int);
#            return id(number).c_str();
             
#            std::basic_string'b';
#            return x;

#             std::string num_text = std::to_string(number);
#             std::string rounded = num_text.substr(0, num_text.find(".")+3);
#             return num_text;
      - if:
          condition:
             lambda: 'return id(KompressorT).state > 30;'
          then:
            - output.turn_on: s20_relay
            - logger.log: "30,0-------_x___x___x___x___x___x__- Kühlung einschalten!"
      - if:
          condition:
             lambda: 'return id(KompressorT).state < 29.5;'
          then:
            - output.turn_off: s20_relay
            - logger.log: "      29,5---__________________ Kühlung aus!!!!!"
2

Hello i solved it after good night of sleep :sweat_smile:

send it as an json publish and all convert in magic

sensor:
  - platform: dallas
    address: 0xxxxxxxx8
    resolution: 11
    id: KompressorT
    name: "Kompressor Temperatur"
    on_value:
      then:
      - mqtt.publish_json:
          topic: the/topic
          payload: |-
            root["KompressorT"] = id(KompressorT).state;
    # Will produce:
    # {"key": 42.0, "greeting": "Hello World"}