CO₂ autonomous meter with esphome

co2-meter.esphome.yaml

esphome:
  name: co2_meter
  platform: ESP8266
  board: d1_mini

i2c:
  sda: D1
  scl: D2
  scan: true

sensor:
  - platform: mhz19
    co2:
      name: "Уровень CO₂"
      id: co2_level
      on_value_range:
        - above: 1000
          then:
            - light.turn_on:
                id: led
                effect: strobe
            - light.turn_on:
                id: buzzer
                brightness: 25%
                # flash_length: 0.1s
            - delay: 3s
            - light.turn_off: buzzer
        - below: 1000
          then:
            - light.turn_off: led
            - light.turn_off: buzzer
    temperature:
      name: "Температура Wemos"
    update_interval: 60s

# For MH-Z19
uart:
  tx_pin: D6
  rx_pin: D7
  baud_rate: 9600

display:
  - platform: ssd1306_i2c
    model: "SSD1306 64x48"
    id: mini_display
    address: 0x3C
    lambda: |-
      if (!id(co2_level).has_state()) {
        it.print(it.get_width()/2, it.get_height()/2, id(noto_sb_big), TextAlign::CENTER, "Wait");
      } else if (id(co2_level).state > 1000) {
        it.fill(COLOR_ON);
        it.print(it.get_width()/2, -1, id(noto_sb_small), COLOR_OFF, TextAlign::TOP_CENTER, "CO2 Bad");
        it.printf(it.get_width()/2, it.get_height()-4, id(noto_sb_big), COLOR_OFF, TextAlign::BASELINE_CENTER, "%.0f", id(co2_level).state);
      } else {
        it.print(it.get_width()/2, -1, id(noto_sb_small), TextAlign::TOP_CENTER, "CO2 Level");
        it.printf(it.get_width()/2, it.get_height()-4, id(noto_sb_big), TextAlign::BASELINE_CENTER, "%.0f", id(co2_level).state);
      }

output:
  - id: buzzer_pin
    platform: esp8266_pwm
    frequency: 1157 Hz
    max_power: 0.5
    pin: D5

  - id: led_pin
    platform: esp8266_pwm
    pin:
      number: D4
      inverted: True

light:
  - id: led
    platform: monochromatic
    output: led_pin
    default_transition_length: 0.1s
    effects:
      - strobe:
      - flicker:
  - id: buzzer
    platform: monochromatic
    output: buzzer_pin
    # name: Buzzer
    effects:
      - strobe:

font:
  - id: noto_sb_small
    file: "fonts/NotoSansSymbols-SemiBold.ttf"
    size: 10

  - id: noto_sb_big
    file: "fonts/NotoSansSymbols-SemiBold.ttf"
    size: 26


logger:

wifi:
  ssid: !secret wifi_name
  password: !secret wifi_password
api:
  password: !secret esphome_password
ota:
  password: !secret esphome_password