A very simple script to display the IP of my RaspberyPi

README.md

Tom32i's Pi boot:

Installation:

Clone the projet:

cd ~
git clone git@gist.github.com:/ad7dd2f30fbff5747522.git boot

Setup correct rights:

sudo chmod 755 /home/tom32i/boot/launcher

Setup the launcher on boot:

Edit the crontab config:

sudo vim /etc/rc.local

Add the following line:

/home/tom32i/boot/launcher

Source:

ip.py

#!/usr/bin/env python

import signal
import dot3k.joystick as joystick
import screen
import scanner

color_ok = [0, 200, 180]
color_ko = [180, 0, 50]

@joystick.on(joystick.RIGHT)
def show_ip(pin):
    ip = scanner.get_ip_address('eth0')

    if ip:
        screen.display(["My ip:", " " + ip], color_ok)
    else:
        screen.display(["", "No ethernet :(", ip], color_ko)

@joystick.on(joystick.LEFT)
def hide_ip(pin):
    screen.clear()

signal.pause()

launcher

#!/bin/bash

sudo python /home/tom32i/boot/welcome.py &
sudo python /home/tom32i/boot/ip.py &

scanner.py

#!/usr/bin/env python

import socket
import fcntl
import struct

def get_ip_address(ifname):
    try:
        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])
    except IOError:
        return False

screen.py

#!/usr/bin/env python

import dot3k.lcd as lcd
import dot3k.backlight as backlight

def display(messages, color = False):

    if not type(messages) is list:
        messages = [messages]

    if len(messages) > 3:
        raise Exception("Only 3 rows on the Display-o-ton 3000!")

    lcd.clear()

    if color:
        set_color(color)

    for (row, message) in enumerate(messages):
        lcd.set_cursor_position(0, row)
        lcd.write(message)

def set_color(color):
    # Green & Blue seems to be mixed up :/
    backlight.rgb(color[0], color[2], color[1])

def clear():
    lcd.clear()
    backlight.rgb(0,0,0)

welcome.py

#!/usr/bin/env python

import time
import screen

screen.display([" ___     _ _", "  | _  _ _) ) o", "  |(_)|||_)/_ |"], [0, 255, 156])
time.sleep(2)
screen.clear()