office-aq-sensor.yaml

esphome:
# I left my name in the 'name:' field below, but feel free to change it to your own
  name:  office-aq-sensor
  platform: ESP8266
  board: d1_mini

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "PleaseChangeMe"

ota:
  password: "PleaseChangeMe"

# Create a switch for safe_mode in order to flash the device
# Solution from this thread:
# https://community.home-assistant.io/t/esphome-flashing-over-wifi-does-not-work/357352/1
switch:
  - platform: safe_mode
    name: "Flash Mode (Safe Mode)"

wifi:
  networks:
  - ssid: PleaseChangeMe
    password: PleaseChangeMe
# If you want your sensor to use a static IP on your network, un-comment and update the block below:
#    manual_ip:
#      static_ip: PleaseChangeMe
#      gateway: PleaseChangeMe
#      subnet: 255.255.255.0
  reboot_timeout: 15min

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "PleaseChangeMe"
    password: "PleaseChangeMe"

captive_portal:

i2c:
  sda: D2
  scl: D1

font:
  - file: "gfonts://Source+Code+Pro@Extra-Light"
    id: roboto
    size: 18

display:
  - platform: ssd1306_i2c
    id: oled
    model: "SSD1306 64x48"
# The code below will create different "pages" containing sensor readings that will be displayed on the OLED screen 
    pages:
      - id: page1
        lambda: |-
          it.printf(0, 0, id(roboto), "CO2:");
          it.printf(2, 24, id(roboto), "%.0fppm", id(co2).state);
      - id: page2
        lambda: |-
          it.printf(0, 0, id(roboto), "PM25:");
          it.printf(2, 24, id(roboto), "%.0f", id(pm25).state);
      - id: page3
        lambda: |-
          it.printf(0, 0, id(roboto), "Hmdty:");
          it.printf(2, 24, id(roboto), "%.0f", id(humidity).state);
      - id: page4
        lambda: |-
          it.printf(0, 0, id(roboto), "Temp:");
            it.printf(2, 24, id(roboto), "%.0fC", id(temp).state);

# Activates a v1 (basic) web server to serve up the /metrics endpoint to Prometheus ("Prometheus" activated in the next section)
web_server:
  port: 9926
  version: 1

# Activates prometheus /metrics endpoint
prometheus:

interval:
  - interval: 5s
    then:
# This will caouse the OLED screen to scroll through the four different pages defined above,
#  displaying a different sensor reading every 5 seconds
      - display.page.show_next: oled
      - component.update: oled

uart:
  - rx_pin: D5
    tx_pin: D6
    baud_rate: 9600
    id: uart1
#    
  - rx_pin: D4
    tx_pin: D3
    baud_rate: 9600
    id: uart2

sensor:
  - platform: sht3xd
    temperature:
      id: temp
      name: "Temperature"
    humidity:
      id: humidity
      name: "Humidity"
    address: 0x44
    update_interval: 5s

  - platform: pmsx003
    # type can be PMSX003, PMS5003S, PMS5003T, PMS5003ST
    # https://esphome.io/components/sensor/pmsx003.html
    type: PMSX003
    uart_id: uart1
    pm_1_0:
      id: pm10
      name: "Particulate Matter <1.0µm Concentration"
    pm_2_5:
      id: pm25
      name: "Particulate Matter <2.5µm Concentration"
    update_interval: 60s
    pm_10_0:
      id: pm100
      name: "Particulate Matter <10.0µm Concentration"
# If you have a version of the PMS*003* sensor that supports formaldehyde, uncomment the below block
#    formaldehyde:
#      id: hcho
#      name: "Formaldehyde (HCHO) concentration in µg per cubic meter"

  - platform: senseair
    uart_id: uart2
    co2:
      id: co2
      name: "SenseAir CO2 Value"
    update_interval: 60s