Inspired by a heise post I found MQTT connectivity for the Ikea VINDRIKTNING and bought 2 of those devices from IKEA.
I followed Hypfer's description with the hardware modification, leaving the fan in it's original wiring for now. The firmware is based on the code of that project as well, however, I had no use for WiFiManager.h and HASS autoconfig so I stripped that off. But the core, reading from the sensor, is just like it was.
Running the 2 sensors side by side I see them return values with an offset of 12, 13 points. I was surprised about the readings, the values seemed quite high compared to what I saw before from another particle sensor.
Since I have an SDS011 sensor running here in a luftdaten.info - setup I