GUVA-S12SD UV sensor

ESPHome
1

Hi, im using a GUVA-S12SD for measuring UV index.

The fluxuation is crazy from 1 to 10 in the space of 1 minute, changing all the time.

Any ideas why this is?

Thanks

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sensor:
  - platform: adc
    pin: GPIO33 # use your desired input pin here
    name: "ADC voltage"
    update_interval: 60s
    id: "uv_index_source"
    accuracy_decimals: 3
    internal: true

  - platform: template
    name: "UV index"
    accuracy_decimals: 0
    unit_of_measurement: ""
    icon: "mdi:sun-wireless"
    lambda: |-
          if (id(uv_index_source).state < 0.05)
            return 0;
          if (id(uv_index_source).state <= 0.227)
            return 1;
          if (id(uv_index_source).state <= 0.32)
            return 2;
          if (id(uv_index_source).state <= 0.4)
            return 3;
          if (id(uv_index_source).state <= 0.5)
            return 4;
          if (id(uv_index_source).state <= 0.6)
            return 5;
          if (id(uv_index_source).state <= 0.69)
            return 6;
          if (id(uv_index_source).state <= 0.8)
            return 7;
          if (id(uv_index_source).state <= 0.88)
            return 8;
          if (id(uv_index_source).state <= 0.97)
            return 9;
          if (id(uv_index_source).state <= 1.08)
            return 10;
          return 11;