Merge pull request #79 from adafruit/stemma_i2c

Added commented out board.STEMMA_I2C with explanation

Author: evaherrada

examples/ssd1306_pillow_clock.py

@@ -18,7 +18,8 @@
 # Setting some variables for our reset pin etc.
 RESET_PIN = digitalio.DigitalInOut(board.D4)
 
-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
 oled = adafruit_ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3D, reset=RESET_PIN)
 
 # Clear display.

examples/ssd1306_pillow_demo.py

@@ -25,7 +25,8 @@
 BORDER = 5
 
 # Use for I2C.
-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
 oled = adafruit_ssd1306.SSD1306_I2C(WIDTH, HEIGHT, i2c, addr=0x3C, reset=oled_reset)
 
 # Use for SPI

examples/ssd1306_pillow_image_display.py

@@ -18,7 +18,8 @@
 # Setting some variables for our reset pin etc.
 RESET_PIN = digitalio.DigitalInOut(board.D4)
 
-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
 oled = adafruit_ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3D, reset=RESET_PIN)
 
 # Clear display.

examples/ssd1306_pillow_ip.py

@@ -34,7 +34,8 @@ def get_ip_address(ifname):
 TEXT = ""
 
 # Very important... This lets py-gaugette 'know' what pins to use in order to reset the display
-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
 oled = adafruit_ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3D, reset=RESET_PIN)
 
 # This sets TEXT equal to whatever your IP address is, or isn't

examples/ssd1306_pillow_text.py

@@ -18,7 +18,8 @@
 RESET_PIN = digitalio.DigitalInOut(board.D4)
 
 # Very important... This lets py-gaugette 'know' what pins to use in order to reset the display
-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
 oled = adafruit_ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3D, reset=RESET_PIN)
 
 # Clear display.