@AranetIoT Btw do you happen to have a PM2.5 sensor (or ideally a combo) in that same form factor?
Could be good to tell whether or not a given place has HEPA filtering, in addition to better understanding pollution levels and the like in general.
@顺便问一下，你是否碰巧有一个PM2.5传感器（或理想的组合）在相同的形状因素？
除了更好地了解污染水平等一般情况外，还可以很好地判断某个地方是否有HEPA过滤。