Update adafruit_sgp30.py

indicate units

Author: Dmole

adafruit_sgp30.py

@@ -130,11 +130,11 @@ def set_iaq_baseline(self, eCO2, TVOC): # pylint: disable=invalid-name
             buffer += arr
         self._run_profile(["iaq_set_baseline", [0x20, 0x1e] + buffer, 0, 0.01])
 
-    def set_iaq_humidity(self, rh): # pylint: disable=invalid-name
-        """Set the humidity for eCO2 and TVOC compensation algorithm"""
-        rh = int(rh * 256)
+    def set_iaq_humidity(self, gramsPM3): # pylint: disable=invalid-name
+        """Set the humidity in g/m3 for eCO2 and TVOC compensation algorithm"""
+        tmp = int(gramsPM3 * 256)
         buffer = []
-        for value in [rh]:
+        for value in [tmp]:
             arr = [value >> 8, value & 0xFF]
             arr.append(self._generate_crc(arr))
             buffer += arr