 
     good = light.getLux(gain,ms,data0,data1,lux);
 
-    if (good) l=lux; else l=-99;
+    if (good) l=lux; else l=-1;
+
     return l;
   }
 }

  pm10 = concLarge;
  pm25 = concSmall;

  Serial.println("Ended  PM read");
  Serial.print("PM 10: ");
  Serial.println(pm10);
  Serial.print("PM 2.5: ");
  Serial.println(pm25);
}
/**
 * Reads pressure from BMP pressure Sensor

  unsigned long sampletime_ms = 30000;
  float countP10, countP25;
  unsigned long starttime=millis();

  for( ;sampletime_ms > millis() - starttime; ){
    P10 = digitalRead(9);
    P25 = digitalRead(8);
