Dust Sensor DSM

[Laboltus]

Hi.

May be I wrong but I guess you mixed something in examples/DustSensorDSM/DustSensorDSM.ino

ratio = (lowpulseoccupancy-endtime+starttime)/(sampletime_ms*10.0); // Integer percentage 0=>100

1. lowpulseoccupancy is counted in microseconds but endtime+starttime are in milliseconds. You cannot just subtract one from the other.
2. according to datasheet the formula is Low ratio[%] = t (sec) / 30 (sec)* 100
   so in code (after adjusting units of measure) it must look like this:
   ratio = lowpulseoccupancy/((endtime-starttime)*10.00);

[henrikekblad]

Would be great if you could open a PR with your proposed changes to https://github.com/mysensors/MySensorsArduinoExamples