Code used to create a PM2.5 sensor with a shinyei ppd42ns and a photon
This code is the code used for the PM 2.5 sensor project that is described at https://airquality406.wordpress.com/
simple base code = original file
simple base code new = original file minus the sparkfun code because that site is shut down. Adds particle publish code
noled = the code that allows you to use the led on th photon as the led instead of having an extrenal LED