1  # This example is for use on (Linux) computers that are using CPython with
 2  # Adafruit Blinka to support CircuitPython libraries. CircuitPython does
 3  # not support PIL/pillow (python imaging library)!
 4  #
 5  # Ported to Pillow by Melissa LeBlanc-Williams for Adafruit Industries from Code available at:
 6  # https://learn.adafruit.com/adafruit-oled-displays-for-raspberry-pi/programming-your-display
 7  
 8  # Imports the necessary libraries...
 9  import socket
10  import fcntl
11  import struct
12  import board
13  import digitalio
14  from PIL import Image, ImageDraw, ImageFont
15  import adafruit_ssd1306
16  
17  # This function allows us to grab any of our IP addresses
18  def get_ip_address(ifname):
19      s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
20      return socket.inet_ntoa(
21          fcntl.ioctl(
22              s.fileno(),
23              0x8915,  # SIOCGIFADDR
24              struct.pack("256s", str.encode(ifname[:15])),
25          )[20:24]
26      )
27  
28  
29  # Setting some variables for our reset pin etc.
30  RESET_PIN = digitalio.DigitalInOut(board.D4)
31  TEXT = ""
32  
33  # Very important... This lets py-gaugette 'know' what pins to use in order to reset the display
34  i2c = board.I2C()
35  oled = adafruit_ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3D, reset=RESET_PIN)
36  
37  # This sets TEXT equal to whatever your IP address is, or isn't
38  try:
39      TEXT = get_ip_address("wlan0")  # WiFi address of WiFi adapter. NOT ETHERNET
40  except IOError:
41      try:
42          TEXT = get_ip_address("eth0")  # WiFi address of Ethernet cable. NOT ADAPTER
43      except IOError:
44          TEXT = "NO INTERNET!"
45  
46  # Clear display.
47  oled.fill(0)
48  oled.show()
49  
50  # Create blank image for drawing.
51  image = Image.new("1", (oled.width, oled.height))
52  draw = ImageDraw.Draw(image)
53  
54  # Load a font in 2 different sizes.
55  font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 28)
56  font2 = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 14)
57  
58  # Draw the text
59  intro = "Hello!"
60  ip = "Your IP Address is:"
61  draw.text((0, 46), TEXT, font=font2, fill=255)
62  draw.text((0, 0), intro, font=font, fill=255)
63  draw.text((0, 30), ip, font=font2, fill=255)
64  
65  # Display image
66  oled.image(image)
67  oled.show()