bme680.yaml

# https://esphome.io/components/sensor/bme680
---
sensor:
  - platform: bme680
    address: 0x77
    update_interval: 60s
    temperature:
      id: temperature
      name: Temperature
    pressure:
      id: pressure
      name: Pressure
      device_class: atmospheric_pressure
    humidity:
      id: humidity
      name: Humidity
    gas_resistance:
      id: gas_resistance
      name: Gas Resistance
  - platform: template
    name: Indoor Air Quality
    id: iaq
    device_class: aqi
    icon: mdi:gauge
    lambda: |-
      return log(id(gas_resistance).state) + 0.04 * id(humidity).state;
    state_class: "measurement"

text_sensor:
  - platform: template
    name: IAQ Classification
    icon: mdi:checkbox-marked-circle-outline
    lambda: |-
      if (int(id(iaq).state) <= 50) {
        return {"Excellent"};
      } else if (int(id(iaq).state) <= 100) {
        return {"Good"};
      } else if (int(id(iaq).state) <= 150) {
        return {"Lightly polluted"};
      } else if (int(id(iaq).state) <= 200) {
        return {"Moderately polluted"};
      } else if (int(id(iaq).state) <= 250) {
        return {"Heavily polluted"};
      } else if (int(id(iaq).state) <= 350) {
        return {"Severely polluted"};
      } else if (int(id(iaq).state) <= 500) {
        return {"Extremely polluted"};
      } else {
        return {"unknown"};
      }