ESPHome yaml files for AirGradient devices to maintain the research and accuracy of AirGradient sensors, while also gaining the benefits of ESPHome/HomeAssistant for easy to use switches, buttons, configurations, and dashboards. Maintains the ability to also send data to the AirGradient Dashboard, which can also be disabled/removed to keep all data local.

In the 2.x release of these configurations, some breaking changes are introduced

• See previous 1.x release breaking changes if coming from earlier versions
• Changed name_add_mac_suffix to false by default. This will no longer add the MAC address to the end of the device name. Assists ESPHome in properly detecting new device as Online without a static IP. Can be changed to true if desired. Ensure all devices have unique name: fields if false.
• Changed the variable names in the substitutions: section to have them match the ESPHome parameters they are used with.
• Changed to config_version: substitution name for a shorter name
• Disabled Upload to AirGradient Dashboard by default, but able to flip the switch in HomeAssistant to enable if desired

• Added Display Contrast slider to dim the display
• Added device_class to the PMSx005 sensors to have them properly reflect in the HomeKit integration if supported (Forum Link)
• Added optional Factory Reset switch that is disabled by default. Can be enabled in HomeAssistant and used if desired
• Added optional diagnostic.yaml package with extra sensors about the ESP device itself, including temperature and free
• Added optional sensor_bme680.yaml package to support the BME680 module if desired
• Added dashboard_import to assist discovery of new devices installed with the pre-compiled .bin files

Many added features can be found in HomeAssistant by going to Settings>Devices and selecting the AirGradient device. Alternatively, add web_server: to the config file to enable a built-in web server on the AirGradient device (No recommended for devices based on the D1 Mini ESP8266)

• Compact single page display by default with all relevant sensor readings

• Display Contrast slider to dim the display

• Enable different pages of information to be shown on the OLED display, or leave the default of a single page with all relevant information

  

• Button to initiate a SenseAir S8 CO2 Calibration on demand

  

• Switch to enable or disable SenseAir S8 CO2 sensor Automatic Baseline Calibration (ABC)

  

• Button to view the current S8 ABC interval (confirm if ABC is disabled or enable, which defaults to every 7 days) View ESPHome logs to see the output of this button

  

• Switch to disable LED output on AirGradient ONE model

• Brightness slider to adjust intensity of AirGradient ONE LED

  

• Switch to toggle display between Fahrenheit and Celsius and persist between reboots

  

• Switch to enable or disable uploading to AirGradient Dashboard via API (Choose to keep data local or also send to AirGradient)

  

• Utilize hardware configuration buttons on AirGradient Pro v3.7 and higher

  • Short press (Less than 1 second) - Toggle between F and C on display
  • Long press (More than 1 second, less than 5) - Trigger manual CO2 calibration

• Leverage automations in HomeAssistant to turn on the "Blank" page and turn off all other pages to effectively disable the display output. Could also turn off the LED strip or set Brightness to 0 to eliminate output while still collecting sensor data

Copy the .yaml file from the main folder for your model and place it in the config folder of your ESPHome. Make any desired changes to the substitutions to name the devices for your use case

Note: by default ESPHome only syncs remote repositories that the packages are referencing once per day, so if changes are made to the repository, you may not get the updated config for up to 1 day after it is published. You can remove the contents of the folder config/.esphome/packages to force it to update sooner

Note: setting add_mac_suffix: "true" allows for multiple devices on your network at the same time and report as unique entries even if your name: field is duplicated, but it can cause ESPHome to not detect devices as Online after installing, since ESPHome is looking for only the name: field and the actual device name has the MAC address added to the end

One way to resolve this is to change add_mac_suffix: "false" so the device name will match exactly. If you have multiple devices, make sure to change the name: field to be unique for each device

Another alternative is to add a static IP to the wifi configuration and configure ESPHome to ping the device by IP instead of hostname

Dashboard status light not working across subnets/zones · Issue #641 · esphome/issues (github.com)

Example for static IP

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  manual_ip:
    static_ip: 192.168.1.121
    gateway: 192.168.1.1
    subnet: 255.255.255.0
    dns1: 192.168.1.1

Install a compiled file to your device all with just a browser and USB cable, no ESPHome install required.

Save the appropriate .bin file and go to https://web.esphome.io/ in your browser to connect your ESP device and send the .bin file to it

In some cases, the device may encounter errors using the web flash tool. Steps to put the device in a special boot flash mode can be found here: https://forum.airgradient.com/t/airgradient-one-not-working-after-flashing-with-arduino/1326/4

The full_config folder contains a single yaml file per model that contains the full standalone configuration, created by the esphome config command. This adds in all of the optional parameters, so is much longer than the minimum configuration, but the single file contains all needed information to be completely independent from this repo.

Copy the full config file to your personal ESPhome config file and customize as desired, then install to your device.

If all original sensors (PMS5003, Senseair S8, SHT4x) are connected, configuration files should be ready If some sensors are not installed, comment or remove the associated sections under packages:

The PMS5003 sensor by default collects readings every second. Since this device has a limited lifespan, it is possible to extend the life by collecting readings less frequently, although this could impact the accuracy of the readings collected, since there will not be constant airflow through the device when the fan shuts down. To collect readings every 2 minutes, change the line for the pms5003 sensor to sensor_pms5003_extended_life.yaml

See PMSX003 Particulate Matter Sensor — ESPHome for more information

To add your WiFi SSID and password, add your SSID and password information, per ESPHome specifications

wifi:
  ssid: NachoWiFi
  password: 123456123456

By default, packages are referencing this GitHub repository, allowing you to do a new Install from ESPHome dashboard to get the latest modifications without downloading other files, but does require an Internet connection. If you wish to have more control over modifications or only reference local files, copy the packages folder to your local ESPHome folder in a packages subfolder and replace github://MallocArray/airgradient_esphome/packages with !include packages

# Example
board: github://MallocArray/airgradient_esphome/packages/sensor_s8.yaml
# becomes
board: !include packages/sensor_s8.yaml

Rather than download an individual package and update the reference to it, you may also use the Extend option to make minor modifications without editing the packages file. This only works for items with and id: defined

Example: adding this to the main file for your device will change the pin number in the config_button package, while maintaining all other settings defined in the package

binary_sensor:
  - id: !extend config_button
    pin:
      number: D7

Several additional packages are available in the packages folder that can be added or removed as needed. For example, the display package includes configuration for multiple pages of information that can be enabled or disabled, or you may wish to change to the package that has a single page to avoid extra switches in HomeAssistant or if you know you won't be using the other pages and want to save on flash memory space.

MQTT support has been mentioned in the AirGradient forums several times. ESPHome supports this by adding a few lines to the main yaml file. Add the relevant information for your configuration. Read more about it here: https://esphome.io/components/mqtt.html

Several more features are planned to be added to this repo

• Support for Open Air without CO2 sensor (Model: O-1PPT)
• Explore options for disabling display/LED during certain times (May be differed to HomeAssistant Automations)
• Standardize font on AirGradient Basic display to match Pro
• Reduce number of fonts used in the multi_page package
  • Open Sans displays a consistent height, but some characters, such as F and 0 are mismatched, the left side is double line thick while right is single line
  • Poppins Light is consistent thickness, but numbers are taller than letters, giving a mismatched height
• Add GitHub actions to automatically build updated .bin files as needed
• Add support for esp32_improv and improv_serial (improv_serial not supported with this board and used pins. esp32_improv uses 30% of available flash memory and is nearly full)
  • https://esphome.io/guides/creators.html
• Add support for dashboard_import and project information
  • https://esphome.io/guides/creators.html