do know IKEA Vindriktning? It is a air quality sensor with - I think nice - features which could be interesting:
It has a built in Cubic PM1006 which measures PM2.5 and some variants also PM1 and PM10.
You can buy this complete Sensor for about EUR10, so cheaper than sds011. it also uses 9600N81 4,5V signal for communication AND has serial Pads for soldering also for simple connection
There are some projects, where this sensor is connected to ESP8266 (For example heise+ has one online)
So the question und suggestion would be:
How can this sensor used for your project. …
I am willing to solder, but cannot program your system or adapt it for this.