esphome_mh-z19e.yaml

esphome:
  name: co2
rp2040:
  board: rpipicow
  framework:
    # Required until https://github.com/platformio/platform-raspberrypi/pull/36 is merged
    platform_version: https://github.com/maxgerhardt/platform-raspberrypi.git
# Enable logging
logger:
# Enable Home Assistant API
api:
  encryption:
    key: #Your Api Key
ota:
  password: #Your ota password
wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
uart:
  rx_pin: 17
  tx_pin: 16
  baud_rate: 9600
sensor:
  - platform: mhz19
    id : my_mhz19_id
    co2:
      name: "MH-Z19 CO2 Value"
    temperature:
      name: "MH-Z19 Temperature"
    update_interval: 30s
    automatic_baseline_calibration: false    
button: #creates a button to calibrate the sensor - this will reset the zero point so use it only when it's been 20 minutes either outside or in a room you know the co2 level is at a minimum
  - platform: template
    name: "Calibrate Zero (20 minutes at 400ppm)"
    id: calibrate_zero
    entity_category: diagnostic
    on_press:
      - mhz19.calibrate_zero: my_mhz19_id
switch: # this will expose a switch to home assistant to turn on and off the ABC
  - platform: template
    name: "Automatic Baseline Calibration"
    entity_category: diagnostic
    optimistic: true
    on_turn_on:
      mhz19.abc_enable: my_mhz19_id
    on_turn_off:
      mhz19.abc_disable: my_mhz19_id