Introduction: Show the Intel Edison WiFi IP Address on a Grove-LCD RGB Backlight

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If you're lucky enough to have a Grove-LCD RGB Backlight device, and want to save yourself the trouble of logging in via the serial console every time, here's how to set up the Intel Edison to print its WiFi address to the LCD.

Sure beats having to look up the IP address every time!

Step 1: Connect the Grove-LCD RGB Backlight Device

  1. Hook up the Arduino shield board to the Edison breakout headers.
  2. Connect the Grove-LCD RGB Backlight to the Arduino shield, attaching it to one of the available I2C ports. Make sure that the black wire goes to GND and red goes to VCC.
  3. That's it! You're ready to run the code.

Step 2: Run the Code

Use the following code to print the Intel Edison's WiFi address to the LCD panel

#!/usr/bin/python
#
# Copyright (c) 2015 Max Vilimpoc§
#
# References:
# http://stackoverflow.com/questions/24196932/how-can-i-get-the-ip-address-of-eth0-in-python
# https://github.com/intel-iot-devkit/upm/blob/master/examples/python/rgb-lcd.py
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import socket
import fcntl
import struct
import pyupm_i2clcd as lcd
def get_ip_address(ifname):
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    return socket.inet_ntoa(fcntl.ioctl(
        s.fileno(),
        0x8915,  # SIOCGIFADDR
        struct.pack('256s', ifname[:15])
    )[20:24])
# Initialize Jhd1313m1 at 0x3E (LCD_ADDRESS) and 0x62 (RGB_ADDRESS)
myLcd = lcd.Jhd1313m1(0, 0x3E, 0x62)
# Clear
myLcd.clear()
# Green
myLcd.setColor(255, 255, 0)
# Zero the cursor
myLcd.setCursor(0,0)
# Print it.
ip_address = get_ip_address('wlan0')
myLcd.write(ip_address)