max-mapper/blink-led.js

## readme.md

      
    Raw
  

              readme.md
            
          
    raspberry pi setup stuff

what these instructions/files are useful for:


make raspberry pi run processes (like node.js servers) automatically on startup and have them monitored by a process monitor
get node running on the pi
install the raspbian OS on an sd card and boot the pi up and login over ssh

notes/instructions


after cloning the stuff in setup.sh you'll have to make and make install everything manually. node will take hours to compile
put mongroup.conf in /home/pi/mongroup.conf
put mongroup-startup.conf in /etc/init/mongroup.conf
install upstart with apt-get install upstart and ignore the warnings
remove the secure_path statement from /etc/sudoers so sudo gets your users PATH
you can add new lines to ~/mongroup.conf to configure new things that should always be running when the raspi is on
if you do the raspi-config sd card expand thing it may cause your next restart to take a lonnnggg time


## blink-led.js
var gpio = require("gpio")
var gpio22, intervalTimer

// Flashing lights if LED connected to GPIO22
gpio22 = gpio.export(22, {
  ready: blinkLED
})

function blinkLED() {
  intervalTimer = setInterval(function() {
    gpio22.set()
    setTimeout(function() { gpio22.reset() }, 500)
  }, 1000)
}

// intercept CTRL+C
process.on('SIGTERM', function() {
  gpio22.reset() // sets header to low
  gpio22.unexport()
  process.exit()
})

## format-sd-card.sh
# this formats a sd card to boot raspberry pi, you can then hook up to raspi over ethernet cable from
# a mac computer. turn on internet sharing in sys prefs first and then the raspi should be 192.168.2.2
# first download http://www.raspberrypi.org/downloads and unzip to raspbian.img
# you might have to change the device name, /dev/disk1s1 is what mac os usually mounts sd cards as
# the dd command might take a couple of minutes, hit ctrl+t to check status
sudo diskutil unmount /dev/disk1s1
sudo dd bs=1m if=raspbian.img of=/dev/rdisk1
sudo diskutil eject /dev/rdisk1

## index.js
require('http').createServer(handler).listen(80)
function handler(req, res) { res.end('hello world!') }

## mongroup.conf
pids = /var/run/
logs = /var/log/
web = node /home/pi/index.js

## setup.sh
#!/bin/sh
sudo apt-get upgrade
sudo apt-get install build-essential libssl-dev git screen avahi-daemon vim upstart
mkdir src
git clone https://github.com/joyent/node.git src/node
git clone https://github.com/visionmedia/mon.git src/mon
git clone https://github.com/jgallen23/mongroup.git src/mongroup

## startup-mongroup.conf
description  'startup processes'
author		'maxogden'

start on runlevel [0123456]

task

exec start-stop-daemon --start -u pi --chdir /home/pi --exec /usr/local/bin/mongroup start
	var gpio = require("gpio")
	var gpio22, intervalTimer

	// Flashing lights if LED connected to GPIO22
	gpio22 = gpio.export(22, {
	ready: blinkLED
	})

	function blinkLED() {
	intervalTimer = setInterval(function() {
	gpio22.set()
	setTimeout(function() { gpio22.reset() }, 500)
	}, 1000)
	}

	// intercept CTRL+C
	process.on('SIGTERM', function() {
	gpio22.reset() // sets header to low
	gpio22.unexport()
	process.exit()
	})
	# this formats a sd card to boot raspberry pi, you can then hook up to raspi over ethernet cable from
	# a mac computer. turn on internet sharing in sys prefs first and then the raspi should be 192.168.2.2
	# first download http://www.raspberrypi.org/downloads and unzip to raspbian.img
	# you might have to change the device name, /dev/disk1s1 is what mac os usually mounts sd cards as
	# the dd command might take a couple of minutes, hit ctrl+t to check status
	sudo diskutil unmount /dev/disk1s1
	sudo dd bs=1m if=raspbian.img of=/dev/rdisk1
	sudo diskutil eject /dev/rdisk1
	require('http').createServer(handler).listen(80)
	function handler(req, res) { res.end('hello world!') }
	pids = /var/run/
	logs = /var/log/
	web = node /home/pi/index.js
	#!/bin/sh
	sudo apt-get upgrade
	sudo apt-get install build-essential libssl-dev git screen avahi-daemon vim upstart
	mkdir src
	git clone https://github.com/joyent/node.git src/node
	git clone https://github.com/visionmedia/mon.git src/mon
	git clone https://github.com/jgallen23/mongroup.git src/mongroup
	description 'startup processes'
	author 'maxogden'

	start on runlevel [0123456]

	task

	exec start-stop-daemon --start -u pi --chdir /home/pi --exec /usr/local/bin/mongroup start