Name: Air Quality data field
Author: BrianKF

Data field to display air quality (PM2.5, particulate matter, not ozone) pulled from the EPA airNOW site, IQAir, or PurpleAir. PurpleAir data can be displayed with or without correction to EPA AQI values. The field updates by default every twenty minutes. 

This is a now a paid datafield, in order to defray the cost of operating the service that supports it.

It will work fully for five days. After that, a code will display on your screen and a notification will appear on your phone asking you to visit https://kzl.io/ to make a one-time payment of USD 2.70 to continue using this data field. Unlock requires a one-time Internet connection. Please sync with your phone if you see a "waiting for server" message.

If the field is displayed using the full width of the device, the temperature will be displayed to the left, in the users preferred units.

Also please leave an email if you contact me from the Garmin app store, otherwise I can't respond.

The AQI value is color-coded according to the values on the EPA site. It also will beep when the value goes into the unhealthy range (red or greater).
Tapping the field switches between PM2.5 and ozone display, when present. PurpleAir doesn't return ozone, only PM2.5, but it does seem to update faster than the EPA site does.

Note for watch users, Connect IQ data fields cannot be added to the watchface, only to the activity widget. This is a limitation of how the Garmin watches operate and is not possible for the creator of a Connect IQ field to change.

This version also will write the AQI values and temperature to the fit file, so that they show up as chart in your activity on the Garmin Connect web site.
