Merge pull request #13 from adafruit/revert-12-add-dew-point

Revert "Added dew point, updated example"

Author: kattni

adafruit_bme280.py

@@ -104,18 +104,6 @@ def _read_temperature(self):
         self._t_fine = int(var1 + var2)
         #print("t_fine: ", self.t_fine)
 
-    @property
-    def dew_point(self):
-        # pylint: disable=invalid-name
-        # Disable: c is a constant used in the Magnus formula
-        """The dew point in Celsius using the Magnus formula. Constants from Sontag, 1990."""
-        b = 17.62
-        c = 243.12
-        gamma = (b * self.temperature /(c + self.temperature)) + math.log(self.humidity / 100.0)
-        dewpoint = (c * gamma) / (b - gamma)
-        return dewpoint
-        # pylint: enable=invalid-name
-
     @property
     def temperature(self):
         """The compensated temperature in degrees celsius."""

examples/bme280_simpletest.py

@@ -9,9 +9,9 @@
 bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
 
 # OR create library object using our Bus SPI port
-# spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
-# bme_cs = digitalio.DigitalInOut(board.D5)
-# bme280 = adafruit_bme280.Adafruit_BME280_SPI(spi, bme_cs)
+#spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+#bme_cs = digitalio.DigitalInOut(board.D10)
+#bme280 = adafruit_bme280.Adafruit_BME280_SPI(spi, bme_cs)
 
 # change this to match the location's pressure (hPa) at sea level
 bme280.sea_level_pressure = 1013.25
@@ -21,5 +21,4 @@
     print("Humidity: %0.1f %%" % bme280.humidity)
     print("Pressure: %0.1f hPa" % bme280.pressure)
     print("Altitude = %0.2f meters" % bme280.altitude)
-    print("Dew point = %0.1f C" % bme280.dew_point)
     time.sleep(2)