Rejected RFIDs -> Buzzer sound and LED red ?

[GetUpdate]

First of all THX it is working well for me. GREAT !

Would like to set up an automation in case TAG is rejected (or e.g. not known).
Thus I would like to be able to have an entity to be able to do an "negative" sound via the Buzzzer and as well an entity to send an red light to the LED (or alternative colors ?).

THX for Hints, Alternatives and your support
CyberHome

[vincentization]

@GetUpdate I also needed something this and I think I found a nice workaround using "NDEF" Tags in Home Assistant. By using the conditions in the on_tag sections that check for the source of the tag, actions can be executed whenever a non-NDEF Tag is scanned. In my case its simply turning a LED red/green depending on what kind of tag was scanned. Unknown Tags will still be added to Home Assistant though. I create my NDEF tags with the HA companion app.

This is what my on_tag section looks like.

pn532_i2c:
  id: pn532_board
  on_tag:
    then:
    - if:
        condition:
          switch.is_on: nfc_led_enabled
        then:
        - light.turn_on:
            id: nfc_led
            brightness: 100%
            red: 0%
            green: 0%
            blue: 100%
            flash_length: 300ms

    - delay: 0.15s #to fix slow component

    - lambda: |-
        id(source)="";
        id(info)="";
        if (tag.has_ndef_message()) {
          auto message = tag.get_ndef_message();
          auto records = message->get_records();
          for (auto &record : records) {
            std::string payload = record->get_payload();
            std::string type = record->get_type();
            size_t hass = payload.find("https://www.home-assistant.io/tag/");
            
            if (type == "U" and hass != std::string::npos ) {
              ESP_LOGD("tagreader", "Found Home Assistant tag NDEF");
              id(source)="hass";
              id(info)=payload.substr(hass + 34);
            }
            else if (type == "T" ) {
              id(info)=payload;
            }
            else if ( id(source)=="" ) {
              id(source)="uid";
            }
          }
        }
        else {
          id(source)="uid";
        }

    - if:
        condition:
          lambda: 'return ( id(source)=="uid" );'
        then:
          - homeassistant.tag_scanned: !lambda |-
              ESP_LOGD("tagreader", "No HA NDEF, using UID");
              return x;
          - light.turn_on:  #LED Lights up RED
              id: nfc_led
              brightness: 100%
              red: 100%
              green: 0%
              blue: 0%
              flash_length: 300ms
    - if:
        condition:
          lambda: 'return ( id(source)=="hass" );'
        then:
          - homeassistant.tag_scanned: !lambda 'return id(info);'
          - light.turn_on:  #LED Lights up GREEN
              id: nfc_led
              brightness: 100%
              red: 0%
              green: 100%
              blue: 0%
              flash_length: 300ms