Weather data such light intensity (lux), temperature and relative humidity are measured and recorded
by a DIY home unit. The data should be interpreted as one local condition. The tutorial and specifcation
of this unit can be found here. You can make one of this
with less than $20.
Wind data is retrieved and powered by Darksky API. It has a friendly
API plus large sets of data.
Particulate concentration of PM2.5 measured by Nova Fitness SDS011. Healthy effect categories
on the US EPA category. While SDS011 is intented to measure the outdoor PM concentrations, the available
space limits the representation of the PM concentration to a balcony (~10th floors) in the south of
Hanoi. The concentration was adjusted based the comparison with the US Embassy BAM 1020. More about
adjustment factor here.
For a comparison between the Air Quality Index by the U.S and Vietnam's standards and levels, visit this graph.