@Rftop Do you have the sensor now?
Sensor is impressively sensitive from initial testing.
The Github library has been updated with the latest changes.
You just need to do the following to get it working on a Photon/Electron:
NOTE 2: SerialPort1 is only enabled in case of MEGA2560 or ESP32 (with defined RX/TX before)
On some boards/IDE (like Particle Photon) Serial1 is available as well. To force-enable from the user sketch : set TX and RX pins BOTH to 8, before calling begin().
3.3.4 Exclude Software Serial communication code
In case software serial is not available for your board / IDE (causing compile errors) OR you want to save memory in sps30.h comment out the line: #define INCLUDE_SOFTWARE_SERIAL 1.Also mention you in the ReadMe: Tested by Ryan Brown on a Sparkfun Photon RED board and the code should also work with the Photon, P1, and Electrons