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How to Pivertise your Pi

You know how sometimes you connect your Raspberry Pi to a wifi network and then you have absolutely no way of finding out its IP address (Zeroes are particularly bad for this)? Well, I fixed it. Paste the run-once-at-boot-time systemd script into /etc/systemd/system/pivertiser.service and enable it with sudo systemctl enable pivertiser.service, paste the terrible bash hack into /home/pi/pivertiser.sh and chmod +x /home/pi/pivertiser.sh, then reboot your pi and it should show its face over here

Those addresses are stored in a hash keyed on hostname, so clearly if you never rename your pi from raspberrypi then this is an astonishingly terrible solution, but it's just solved a little problem for me. And you can of course run your own instance on Heroku if you want to

Before you begin

sudo easy_install gpiozero

The script

from gpiozero import LED
from time import sleep

yellow = LED(17)

Easily embed your README.md as documentation

Disregards everything before the first # Heading
Requires kramdown

Install jQuery and jasmine-jQuery (yes, this is a bit of a hack)

    curl https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js -o spec/javascripts/helpers/jquery.min.js
    curl https://raw.github.com/velesin/jasmine-jquery/master/lib/jasmine-jquery.js -o spec/javascripts/helpers/load-after-jquery-jasmine-jquery.js

Set up continuous integration in Travis:

	require 'date'
	require 'httparty'
	require 'timecop'

	dawn_of_time = DateTime.parse '2016-01-01'
	today = DateTime.now

	while today > dawn_of_time do
	Timecop.freeze today do
	d = DateTime.now.strftime '%Y-%m-%d'

	source 'https://rubygems.org'

	gem 'github-pages'
	gem 'bootstrap', '~> 4.0.0.alpha4'
	gem 'compass'
	gem 'rake'

	#!/bin/bash

	ZIPPATH="mongo-`date +%Y-%m-%d`.tbz"
	CONTAINER=quirkafleeg-dumps
	AUTHURL=https://lon.auth.api.rackspacecloud.com/v1.1/auth
	AUTHXML="<?xml version='1.0' encoding='UTF-8'?><credentials xmlns='http://docs.rackspacecloud.com/auth/api/v1.1' username='`head -1 /root/.rackspace.creds`' key='`tail -1 /root/.rackspace.creds`' />"

	echo -n 'Dumping... '
	/usr/bin/mongodump
	echo 'done'

	tr.foo {
	background-color: #fa5100;
	}

	tr.bar {
	background-color: #0c58a2;
	}

	curl https://raw.githubusercontent.com/peterkwells/uk-attitudes-to-offensive-language-and-gestures-data/gh-pages/data/list-of-swearwords-and-offensive-gestures.csv \| tr -s '\015' '\n' \| grep -v UID \| cut -d ',' -f 2 \| say

	# old version below, now broken because Peter changed something - this will read the source of the 404
	#curl https://peterkwells.github.io/known-uk-swearwords/data/swearwords.csv \| tr -s '\015' '\n' \| grep -v UID \| cut -d ',' -f 1,2 \| sed "s:\(.\),\(.\):number \1, \2,:" \| say