Awair Element

Cheap-ish indoor air quality sensor, with nice LED display on the front.

AWAIR Element – liutyi.info

So I would say nothing critical was removed to achieve better price. It is still a good design, both internal and external. Same air quality sensors:

API

Provides a local API if activated

Awair Knowledge base article on activation

# curl -s http://<IP address>/air-data/latest | jq
{
  "timestamp": "2022-08-01T20:20:18.262Z",
  "score": 92,
  "dew_point": 15.99,
  "temp": 24.1,
  "humid": 60.54,
  "abs_humid": 13.21,
  "co2": 473,
  "co2_est": 414,
  "co2_est_baseline": 37111,
  "voc": 153,
  "voc_baseline": 38989,
  "voc_h2_raw": 26,
  "voc_ethanol_raw": 38,
  "pm25": 3,
  "pm10_est": 4
}

Internals

STM32 based - Module used

Awair Element inside - Air Quality - WIKI

Discover the magic of the internet at Imgur, a community powered entertainment destination. Lift your spirits with funny jokes, trending memes, entertaining gifs, inspiring stories, viral videos, and so much more from users.

Firmware

Update via the app only, maybe even directly on the device itself, and only controlled via the app

App

Awair Home - Apps on Google Play

Know Your Air

Seems to use MQTT(S)

Potentially interesting URLs from the app

# grep BASE_ UrlConsts.java
  public static final String APP_BASE_URL = "https://mobile-app.awair.is/";
  public static final String B2C_MOBILE_APP_BASE_URL = "https://b2c-mobile-app.awair.is";
  public static final String CONTENT_BASE_URL = "https://tips.awair.is/";
  public static final String INTERNAL_BASE_URL = "https://internal.awair.is/";
  public static final String MY_BASE_URL = "https://my.awair.is/";
  public static final String NEST_THIRD_PARTY_BASE_URL = "https://developer-api.nest.com/";
  public static final String NEST_TOKEN_BASE_URL = "https://api.home.nest.com/";
  public static final String NOTICE_BASE_URL = "https://awair-app-notice.awair.is/";
  public static final String ORG_BASE_URL = "https://us-central1-awair-prd.cloudfunctions.net/";
  public static final String OTA_BASE_URL = "https://ota.awair.is/";
  public static final String SHARE_MOBILE_APP_BASE_URL = "https://share.awair.is/mobile/";
  public static final String THERMOSTATS_TRIGGER_BASE_URL = "https://thermostats-trigger.awair.is/";