====== Installation de la raspberry Pi ======

===== Utilisation du version minimaliste de raspbian =====

Nous avons choisis une version minimaliste de raspbian disponnible ici :
http://www.linuxsystems.it/raspbian-wheezy-armhf-raspberry-pi-minimal-image/

Pour préparer la carte SD suivre le tuto ici (section command line interface) : 
http://www.raspberrypi.org/documentation/installation/installing-images/linux.md

===== Création du point d'accès wifi =====

Suivre ce tuto : http://elinux.org/RPI-Wireless-Hotspot \\
Un autre tuto en français : http://www.journaldulapin.com/2013/05/05/un-serveur-nabaztag-autonome-avec-le-raspberry-pi/

<note>
Note pour la clé wifi Brest-wirless faut installer :
  sudo apt-get install zd1211-firmware
</note>

Installer le nécessaire pour avoir du wifi :
  apt-get install wireless-tools wpasupplicant
  
  apt-get install hostapd udhcpd

Notre fichier ///etc/udhcpd.conf// :
<code>
# Sample udhcpd configuration file (/etc/udhcpd.conf)

# The start and end of the IP lease block

start		192.168.42.100	#default: 192.168.0.20
end		192.168.42.150	#default: 192.168.0.254


# The interface that udhcpd will use

interface	wlan0		#default: eth0


# The maximim number of leases (includes addressesd reserved
# by OFFER's, DECLINE's, and ARP conficts

#max_leases	254		#default: 254


# If remaining is true (default), udhcpd will store the time
# remaining for each lease in the udhcpd leases file. This is
# for embedded systems that cannot keep time between reboots.
# If you set remaining to no, the absolute time that the lease
# expires at will be stored in the dhcpd.leases file.

remaining	yes		#default: yes


# The time period at which udhcpd will write out a dhcpd.leases
# file. If this is 0, udhcpd will never automatically write a
# lease file. (specified in seconds)

#auto_time	7200		#default: 7200 (2 hours)


# The amount of time that an IP will be reserved (leased) for if a
# DHCP decline message is received (seconds).

#decline_time	3600		#default: 3600 (1 hour)


# The amount of time that an IP will be reserved (leased) for if an
# ARP conflct occurs. (seconds

#conflict_time	3600		#default: 3600 (1 hour)


# How long an offered address is reserved (leased) in seconds

#offer_time	60		#default: 60 (1 minute)

# If a lease to be given is below this value, the full lease time is
# instead used (seconds).

#min_lease	60		#defult: 60


# The location of the leases file

#lease_file	/var/lib/misc/udhcpd.leases	#defualt: /var/lib/misc/udhcpd.leases

# The location of the pid file
#pidfile	/var/run/udhcpd.pid	#default: /var/run/udhcpd.pid

# Everytime udhcpd writes a leases file, the below script will be called.
# Useful for writing the lease file to flash every few hours.

#notify_file				#default: (no script)

#notify_file	dumpleases	# <--- useful for debugging

# The following are bootp specific options, setable by udhcpd.

#siaddr		192.168.0.22		#default: 0.0.0.0

#sname		zorak			#default: (none)

#boot_file	/var/nfs_root		#default: (none)

# The remainer of options are DHCP options and can be specifed with the
# keyword 'opt' or 'option'. If an option can take multiple items, such
# as the dns option, they can be listed on the same line, or multiple
# lines. The only option with a default is 'lease'.

#Examles
#opt	dns	192.168.10.2 192.168.10.10
#option	subnet	255.255.255.0
#opt	router	192.168.10.2
#opt	wins	192.168.10.10
#option	dns	129.219.13.81	# appened to above DNS servers for a total of 3
#option	domain	local
#option	lease	864000		# 10 days of seconds

opt dns 8.8.8.8 4.2.2.2 # The DNS servers client devices will use.
opt subnet 255.255.255.0
opt router 192.168.42.1 # The Pi's IP address on wlan0 which we will set up shortly.
opt lease 864000 # 10 day DHCP lease time in seconds

# Currently supported options, for more info, see options.c
#opt subnet
#opt timezone
#opt router
#opt timesrv
#opt namesrv
#opt dns
#opt logsrv
#opt cookiesrv
#opt lprsrv
#opt bootsize
#opt domain
#opt swapsrv
#opt rootpath
#opt ipttl
#opt mtu
#opt broadcast
#opt wins
#opt lease
#opt ntpsrv
#opt tftp
#opt bootfile
#opt wpad

# Static leases map
#static_lease 00:60:08:11:CE:4E 192.168.0.54
#static_lease 00:60:08:11:CE:3E 192.168.0.44

# --- EyeFi Cards ---
static_lease 00:18:56:2e:74:20	192.168.42.100  # EyeFi 0
static_lease 00:18:56:2f:79:98	192.168.42.101	# EyeFi 1
static_lease 00:18:56:2f:73:52	192.168.42.102	# EyeFi 2
static_lease 00:18:56:2f:77:03	192.168.42.103	# EyeFi 3
static_lease 00:18:56:2f:75:35	192.168.42.104	# EyeFi 4
static_lease 00:18:56:2e:73:95	192.168.42.105	# EyeFi 5
</code>

Nous donnons une adresse IP fixe aux cartes EyeFi pour pouvoir les identifier plus facilement par la suite.

Notre fichier ///etc/network/interfaces// :
<code>
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

allow-hotplug eth0
iface eth0 inet dhcp

auto wlan0
iface wlan0 inet static
  address 192.168.42.1
  netmask 255.255.255.0

up iptables-restore < /etc/iptables.ipv4.nat
</code>

Notre fichier ///etc/hostapd/hostapd.conf// :
<code>
# interface wlan du Wi-Fi
interface=wlan0

# nl80211 avec tous les drivers Linux mac80211 
driver=nl80211

# Nom du spot Wi-Fi
ssid=OpenStreetView

# mode Wi-Fi (a = IEEE 802.11a, b = IEEE 802.11b, g = IEEE 802.11g)
hw_mode=g

# canal de fréquence Wi-Fi (1-14)
channel=6

# Wi-Fi ouvert, pas d'authentification !
auth_algs=1

# Beacon interval in kus (1.024 ms)
beacon_int=100

# DTIM (delivery trafic information message) 
dtim_period=2

# Maximum number of stations allowed in station table
max_num_sta=15

# RTS/CTS threshold; 2347 = disabled (default)
rts_threshold=2347

# Fragmentation threshold; 2346 = disabled (default)
fragm_threshold=2346

#control interface, will be used by hostapd_cli
ctrl_interface=/var/run/hostapd

wmm_enabled=0
</code>

===== Python3.2 =====

  apt-get install python3.2

===== Bluetooth (pour la montre liveview) =====

Installation du bluetooth :
  apt-get install bluetooth
  
Démarrer la montre en restant appuyer sur les 2 boutons.

Faire un scan bluetooth :
  pi@raspberry-pi:~$ hcitool scan
  Scanning ...
	BC:85:56:68:92:8E	ubuntu-0
	30:39:26:C4:B0:C2	LiveView

<note>Voir ce qu'il manque pour l'apairage</note>

===== I2C (boussoles, accéléro ...) =====

  apt-get install python-smbus python3-serial
  
Ajouter en fin du ~/.bashrc :
  export QUICK2WIRE_API_HOME=/home/pi/OpenPathView_wip/includes/quick2wire-python-api
  export PYTHONPATH=$PYTHONPATH:$QUICK2WIRE_API_HOME
  
Puis faire un :
  source .bashrc
  
Permissions, editer le fichier /lib/udev/rules.d/60-i2c-tools.rules :
  KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0666"
  
===== Liaison série avec l'arduino (via USB) =====

  sudo usermod -a -G dialout pi