Merge pull request #15 from adafruit/stemma_i2c

Added commented out board.STEMMA_I2C with explanation

Author: evaherrada

examples/ltr390_alert_test.py

@@ -8,7 +8,8 @@
 
 THRESHOLD_VALUE = 100
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 ltr = LTR390(i2c)
 
 ltr.high_threshold = THRESHOLD_VALUE

examples/ltr390_configuration_example.py

@@ -7,7 +7,8 @@
 import board
 from adafruit_ltr390 import LTR390, MeasurementDelay, Resolution, Gain
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 ltr = LTR390(i2c)
 
 # ltr.resolution = Resolution.RESOLUTION_16BIT

examples/ltr390_simpletest.py

@@ -5,7 +5,8 @@
 import board
 import adafruit_ltr390
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 ltr = adafruit_ltr390.LTR390(i2c)
 
 while True: