Raspberry Pi Notes

85.6mm x 56mm x 21mm

45 grams

hardware projects including robotics

lights

sensors (motion, temperature, light, …)

motors

cameras

microcontrollers (like Arduino)

breadboards, stripboards

LCDs

XBMC

non-profit

handled by two companies

256MB of RAM

one USB port

no Ethernet port (can buy a USB Ethernet adapter)

$25

512MB of RAM

two USB ports

one Ethernet port

$35

CPU - ARM11 (ARM1176JZFS) processor design with floating point running at 700Mhz

GPU - Videocore 4, BluRay quality playback using H.264 at 40Mbs

can overclock, but voids warranty

512MB in Model B, 256MB in Model A

cannot add memory

power

others?

power Micro-B USB requires 5 volts

SD card

audio 3.5mm for standard speakers and headphones

HDMI video and audio

composite video (RCA)

Display Serial Interface (DSI) for tablets and smartphones

USB - 2 on Model B, 1 on Model A

RJ45 Ethernet on Model B

General Purpose Input Output (GPIO) 26-pin

others (camera, tablet display)

can purchase adapters for Digital Video Interconnect (DVI)
and Video Graphics Array (VGA)

for older TVs

for flat panel displays of tablets and phones

connect with a ribbon cable

using same cable as for video

for analog audio

need powered speakers for good volume

Newark (element14) - http://www.newark.com

Allied Electronics - http://www.alliedelec.com

many phone charges will work

see list of verified SD cards at http://www.elinux.org/RPi_SD_cards#Verification

minimum size is 2GB, recommended size is 4GB

get even large to store more user files and user-installed software

for devices that require more that the RPi can provide

avoid cheap ones that supply power to the RPi when connected

a good one is Belkin Hi-Speed USB 2.0 4-Port Hub (F5U234v1)

can buy one that supports both WiFi and bluetooth

see instructions below on using this

Raspian "whezzy" is recommended

Soft-float Debian "whezzy" is needed to use JVMs before Java 8

others supported by the Raspberry Pi Foundation

unzip it to get .img file

insert SD card into reader

download "Image Writer for Windows" from http://sourceforge.net/projects/win32diskimager/

double-click Win32DiskImager.exe

browse to locate and select the .img file to copy

in "Device" dropdown, select drive letter of SD card

click "Write" button

takes a long time to finish

open Terminal window

enter diskutil list and find the SD card path by disk size

enter diskutil unmountdisk /dev/disk{number}

cd to directory containing .img file

enter dd if={file-name}.img of=/dev/disk{number} bs=2M

can rename SD card in Finder

enter diskutil eject /dev/disk{number}

open a terminal window

enter sudo fdisk -l and find the SD card path by disk size

cd to directory containing .img file

enter sudo dd if={file-name}.img of=/dev/sd{number} bs=2M

takes a long time to finish

plug the RPi power supply, powered USB hub and monitor into the strip and use the switch to turn them all on/off

touch spots marked "TP1" and "TP2" on board (called "vias")
with the points of a digital multimeter

should be between 4.8 and 5 volts

reboot to restore?

responds to input very slowly

select "expand_rootfs"

select "change_locale"

select "change_timezone"

select "Finish"

select "Yes" for "Reboot now"

sudo rasp-config

takes about 15 seconds to launch

enter sudo dpkg-reconfigure tzdata

select "US" and "Central"

many options for display settings, overclocking and overvoltage

only read at startup, so changes do not take effect until rebooted

select LXDE…Preferrences…Keyboard and Mouse…Mouse

select "Left handed" checkbox

?

can this be done with the raspi-config "configure_keyboard" option?

sudo vi /etc/default/keyboard

change XKBLAYOUT from "gb" to "us"

sudo setupcon

sudo reboot

xmodmap

determine keycode of caps lock key

touch .xmodmap

add these lines to .xmodmap

touch .xinitrc

add this line to .bashrc

logout

startx

/boot VFAT partition for files required to boot Linux (7MB)

/ EXT4 partition for rest of Linux and user files (much larger)

enter sudo fdisk -l

probably want to delete all partitions except /boot and / and maximize size / partition instead d

enter sudo apt-get install gparted

enter sudo gparted

not needed if "expand_rootfs" was selected during first time startup

if a partition will be deleted, remove mounting of it

perform these steps on another computer

some steps below are Mac-specific

create Parted Magic CD

boot from Parted Magic CD

attach SD card reader to USB port and insert RPi SD card

if there is a free partition after the primary one, delete it

maximize size of primary partition

where does apt-get install software? not in /opt?

you documented these steps elsewhere in this file

how can it be configure to run this automatically after login?

this isn’t configured by default

sudo raspi-config

use tab key to move selection

press enter to select item under cursor

select "configure_keyboard"

accept current value for first four options

set "Use Control+Alt+Backspace to terminate the X server?" to Yes

sudo reboot

Accessories - Debian Reference, File Manager, Galculator, Image Viewer, Leafpad, LXTerminal, Root Terminal, Xarchiver

Education - Scratch, Squeak

Graphics - xpdf

Internet - Dillo, Midori, Midori Private Browsing, NetSurt Web Browser, wpa_gui

Other - too many to list

Programming - IDLE, IDLE 3, Scratch, Squeak

System Tools - Task Manager

Preferences - Bluetooth Manager, Customize Look and Feel, Desktop Session Settings, Keyboard and Mouse, Monitor Settings, Openbox Configuration Manager, Preferred Applications

to change clock in lower-right from 24-hour format to 12-hour with am/pm

all cookies are disabled by default

edit ~/.dillo/cookiesrc to enable cookies for all or selected sites

open source basis of Google Chrome browser; most code is shared

to install, enter sudo apt-get install chromium-broswer

OpenOffice.org

The Gimp

Google Drive (was Google Docs)

log in using an existing account such as "pi"

enter +sudo useradd -m -G adm,dialout,cdrom,audio,plugdev,users,lpadmin {username}

enter +sudo passwd {username}

enter sudo apt-get update

enter sudo apt-get install {pkg-name}

enter sudo apt-get remove {pkg-name}

can use purge instead of remove to also remove related configuration files

enter sudo apt-get update

install it again

enter sudo apt-get upgrade

enter apt-cache search "{keywords}"

enter apt-cache depends {pkg-name}

enter dpkg -l

enter vi /var/log/apt/history.log

look for sections with start date later than date of Linux distro

look at all "Commandline" entries from that point to the end

enter dpkg --info {pkg-name}

enter dpkg -L {pkg-name}

enter dpkg -S {file-path}

enter dpkg -s {pkg-name} | grep Status

enter sudo apt-get install bluetooth

enter sudo apt-get bluez-utils

enter sudo apt-get blueman

really need all three?

does one of these add "Bluetooth Manager" to LXDE…Preferences?

enter /etc/init.d/bluetooth status

enter /etc/init.d/bluetooth start

it was already running for me

press "Setup" button

press "Connect" button

turn on all wireless devices

enter hcitool scan

sudo bluez-simple-agent hci0 {mac-address}

sudo bluez-test-device trusted {mac-address} yes

sudo bluez-test-input connect {mac-address}

sudo reboot

get help and see all the options: enter raspistill

to display video on screen without saving, enter raspivid

to install, enter sudo apt-get install scrot

to capture entire screen, enter scrot

to capture a specific window, enter scrot -s and click window title bar

to capture a specific rectangle, enter scrot -s and drag out rectangle with mouse

to view resulting file, enter gpicview {file-path}

file created

enter man scrot or scrot -h for more options

see http://blog.kugelfish.com/2012/09/raspberry-pi-tethering.html

sudo apt-get install avahi-daemon

sudo update-rc.d avahi-daemon defaults

give your RPi a unique name

sudo reboot

ssh pi@markpi.local

Darren uses the -X and -6 options - Why?

enter dmesg | grep usb

find line containing "802.11n WLAN Adapter"

find line after that containing "Manufacturer:"

mine is "Realtek"

my USB adapter is a Cirago Bluetooth 3.0 High Speed
and Wi-Fi Combo Mini USB Adapter (model BTA7300)

apt-cache search {manufacturer}

sudo apt-get install {firmware-name}

mine is "firmware-realtek"

sudo iwlist scan | grep ESSID

select the ESSID value of one of them

ex. "Volkmann AirPort" (note the capital P)

iwconfig

look for "wlan0" followed by "unassociated"

sudo vi /etc/network/interfaces

comment out existing lines that contains "wlan0" and "wpa-roam"

add these lines

create the file /etc/wpa.conf

add a line containing "network={"

add a line containing "[tab]ssid="{essid-value}""

if wireless network uses WPA

if wireless network uses WEP

if wireless network uses no encryption

add a line containing "}"

sudo ifup wlan0

it may output "interface wlan0 already connected"

ping -c 1 www.raspberrypi.org

to install, enter +sudo apt-get install moc*

to start, enter mocp

to use

from another terminal window

to control volume

OpenELEC

Rasbmc

can temporarily attach components and test circuits without soldering

connections can become loose when the breadboard is moved

used to affect electrons and their associated fields

have two or moer terminals

they may be discrete or several may be integrated into a package

two categories: passive and active

include LEDs, capcitors, diodes, integrated circuits, motors, potentiometers, push-buttons, resistors, sensors, transistors, wires, others?

potentiometer

sensors include light, motion, pressure, smell?, sound, temperature, wind, others?

can get many of these at Radio Shack and online at Newark/element14 (http://www.newark.com)

insert and solder components to build permanent circuits

can break into desired size

a popular brand is Veroboard

in US, can purchase from Newark and Adafruit (http://www.adafruit.com)

attach to GPIO port

can make it easier to access GPIO pins

some limit the voltage that can be sent to them to prevent damage

some provide circuitry needed to attach other devices such as motors

Ciseco Slice of Pi - $7.99

Adafruit Prototyping Plate/Dish - $15.95/$22.50

Fen Logic Gertboard - $?

Raspberry Pi Camera Board