Not yet. Unfortunately, these are usually quite big, and we didn't want to sacrifice the portability. But you can add a PM sensor through the extension port. We'll document this in our upcoming manual.

A fellow Crowd Supply project, Polverine[1], uses a new Bosch sensor that is very small. If we do a refresh of the device, we'll certainly look into adding it.

[1]: https://www.crowdsupply.com/blackiot/polverine

IMO, PM2.5 sensors are essential nowadays. What's the point of a device without one? Especially for $229. I can get a chinese thingy like qingping for ~$115 with PM2.5 and other stuff.