Latest revision as of 17:19, 31 October 2015

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Setup

Install OS on SD card

• Purchase a verified SDHC cards - http://elinux.org/RPi_SD_cards
• Follow EASY setup - http://elinux.org/RPi_Easy_SD_Card_Setup
• resizing main partition from booted raspberry pi - http://elinux.org/RPi_Resize_Flash_Partitions

TextMate and rmate for simple remote editing

• install textmate on os x system
• install ruby on raspberry pi:

sudo apt-get install ruby

• install rmate on raspberry pi:

sudo gem install rmate

• setup ssh tunneling

ssh -R 52698:localhost:52698 pi@192.168.2.144

Debugging

Using a USB to TTL cable

• Install USB drivers
  • for os x - http://sourceforge.net/projects/osx-pl2303/
• Connect pins like so:
• NOTE: LEAVE THE RED WIRE OFF TO USE EXTERNAL POWER SUPPLY. leave the red wire connected to power pi from the usb cable.
• Use screen to connect to pi. From Terminal, start session:
  • screen /dev/cu.usbserial 115200

What port is my raspberry pi on?

• list all device addresses on a port
  • arp -i bridge0 -a

Set IP address

• On OS X set ethernet to DHCP with manual addressing. Choose address 192.168.3.1.
• Scan for raspberry pi:

  sudo nmap -sP 192.168.2.1/24 | awk '/^Nmap/{ip=$NF}/B8:27:EB/{print ip}'
  

Set .local name

Maintenance

Backup your System Image

backup with rpi-clone

• uses dd and rsync:

https://github.com/billw2/rpi-clone

backup with tar.gz

http://sysmatt.blogspot.com/2014/08/backup-restore-customize-and-clone-your.html

backup with dd

• power off the pi, remove the sd card, and insert it in your computer.
• check what drive it is. on os x:
  • df
  • you should see something like /dev/disk2s1, figure out which is your hard drive and which is the SD card.
• unmount the card.
  • diskutil unmount /dev/disk2s1
• duplicate the disk to your hard drive. replace the second argument, of=/Volumes/Cistern/RaspberryPi/... with the path and filename where you want to backup the image.
  • sudo dd if=/dev/rdisk2 of=/Volumes/Cistern/RaspberryPi/wheezy-20130522-backup.img bs=1m
  • you can hit Ctrl-t on your keyboard to see stats about the copy in progress.
• when it is done. eject the disk.
  • diskutil eject /dev/rdisk2

Restore from backup image

• repeat steps above to insert SD card, identify, and unmount.
• duplicate from image file to sd card:

sudo dd if=twomey2-20140130-backup.img of=/dev/rdisk2 bs=1m

Shrinking too large image

• http://www.raspberrypi.org/phpBB3/viewtopic.php?t=19468&f=26

Backup and Restore Raspberry Pi images to smaller SD cards, using a Linux computer

• http://redey.net/Blog/?p=407

Add a Data Partition

• shrink http://www.hack-job.org/general/resize-raspberrypi-root-partition/
• shrink http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=60161&p=450676&hilit=shrink+partition#p450676

4 GB:

rtwomey@rtwomey-MacBookPro:~$ sudo fdisk -u /dev/mmcblk0
[sudo] password for rtwomey: 
You will not be able to write the partition table.

Command (m for help): p

Disk /dev/mmcblk0: 3959 MB, 3959422976 bytes
4 heads, 16 sectors/track, 120832 cylinders, total 7733248 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000f06a6

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            8192      122879       57344    c  W95 FAT32 (LBA)
/dev/mmcblk0p2          122880     7733247     3805184   83  Linux

16 GB

rtwomey@rtwomey-MacBookPro:~$ sudo fdisk -u /dev/mmcblk0

Command (m for help): p

Disk /dev/mmcblk0: 16.1 GB, 16130244608 bytes
4 heads, 16 sectors/track, 492256 cylinders, total 31504384 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00014d34

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            8192      122879       57344    c  W95 FAT32 (LBA)
/dev/mmcblk0p2          122880    31504383    15690752   83  Linux

update firmware with rpi-update

• https://github.com/Hexxeh/rpi-update

Configuration

create local wifi hotspot

• http://www.daveconroy.com/turn-your-raspberry-pi-into-a-wifi-hotspot-with-edimax-nano-usb-ew-7811un-rtl8188cus-chipset/
• https://forums.adafruit.com/viewtopic.php?f=19&t=47716

create .local domain name for raspberry pi

• http://www.howtogeek.com/167190/how-and-why-to-assign-the-.local-domain-to-your-raspberry-pi/

apt-get not connecting

• add DNS server. see here:

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=17016

vim instead of vi

vim instead of vi so arrow keys work:

• sudo apt-get update
• sudo apt-get -y install vim

bash configuration

• edit .bashrc:
  • uncomment ll and la

add a user account

while logged in as PI user:

• sudo adduser MyUser
• sudo adduser MyUser sudo

now it is time to test out your new account.

• logout as pi:
  • logout
• at the login prompt, login as your username created above.
• CONGRATS!
• time to shut down your system:
  • sudo poweroff type in your password. the system will shut down.

add audio for non-default user

getting audio to work for a non-default user:

1. sudo usermod -a -G adm,dialout,cdrom,sudo,audio,video,plugdev,games,users,netdev,input rtwomey
2. logout, then login

SSH Login

ssh login:

• should work by default. you just need to know the IP address.
• Connecting to a local mac with internet sharing on, it's probably 192.168.2.3, or 192.168.2.2.
• Store your public key on the remote system, so you aren't prompted for password:

http://www.linuxproblem.org/art_9.html

not resolving IP addresses

• sudo vi /etc/resolv.conf
• add the line nameserver 8.8.8.8
  • this is the google nameserver.

vnc remote

• http://learn.adafruit.com/adafruit-raspberry-pi-lesson-7-remote-control-with-vnc/installing-vnc
• http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=34094

overclocking

• using command line http://www.jeremymorgan.com/tutorials/raspberry-pi/how-to-overclock-raspberry-pi/
• using raspi-config http://elinux.org/RPi_raspi-config

scp

• to copy photos to my current computer, over ethernet cable:
  • scp rtwomey@192.168.2.3:~/images/*.jpg ~/Pictures/
• if you've stored your ssh public key, you won't be prompted for password!

Software

pocketsphinx / usb mic

https://wolfpaulus.com/journal/embedded/raspberrypi2-sr/

google speech scripts

*install pyaudio:

sudo apt-get install python-pyaudio

• install pyaudio dependencies:

sudo apt-get install libportaudio0 libportaudio2 libportaudiocpp0 portaudio19-dev

• install pyaudio:

git clone http://people.csail.mit.edu/hubert/git/pyaudio.git
cd pyaudio
sudo python setup.py install

• install flac:

sudo apt-get install flac

• clone google speech scripts:

git clone https://github.com/jeysonmc/python-google-speech-scripts

Voice Command

• http://www.instructables.com/id/Raspberri-Personal-Assistant/?ALLSTEPS
• http://stevenhickson.blogspot.nl/2013/06/installing-and-updating-piauisuite-and.html
• http://blog.oscarliang.net/raspberry-pi-voice-recognition-works-like-siri/

Jasper

• http://jasperproject.github.io/

FM Transmitter

• FM transmitter with python code - http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter
  • cached
  • this works!!
• get file with wget:
  • wget http://www.icrobotics.co.uk/wiki/images/c/c3/Pifm.tar.gz
• unzip the file:
  • tar -xvzf Pifm.tar.gz
• What files were created extracted, and where did it put them?
  • ls -la
• Make a radio folder and move the files in.
  • mkdir radio
  • mv pifm.* radio
  • mv PiFm.py radio
  • mv sound.wav radio

gphoto2

• installing:
  • sudo apt-get install gphoto2
• take a photo:
  • gphoto2 --capture-image-and-download
• after taking a photo it's necessary to reset the USB port. use usbreset util.
  • usbreset /dev/bus/usb/001/004
  • put your /dev/bus/usb device as the second argument above. you can find it from --list-ports.
• list cameras:
  • gphoto2 --list-ports
• control and capture of DSLR http://skowron.biz/artikel/gphoto-raspberry/

usbreset

• build by hand: http://toothbrushsymphony.blogspot.com/2013/01/usb-reset-on-raspberry-pi.html
• apt-get?

festival

• festival on raspberry pi - http://elinux.org/RPi_Text_to_Speech_(Speech_Synthesis)
• see http://wiki.roberttwomey.com/Setting_Up_Festival_TTS#Using_Voice_on_Raspberry_Pi

pocketsphinx

• http://wiki.roberttwomey.com/Setting_Up_Festival_TTS#Using_Voice_on_Raspberry_Pi
• sphinx on raspberry pi - https://sites.google.com/site/observing/Home/speech-recognition-with-the-raspberry-pi
• http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37&t=9487

Pockesphinx

• Install libasound2-dev, bison (bison was already installed on my raspberry pi):
  • sudo apt-get install libasound2-dev
• Get sphinxbase and pocketsphinx, preferrably putting them in a code directory:
  • wget http://sourceforge.net/projects/cmusphinx/files/sphinxbase/0.8/sphinxbase-0.8.tar.gz
  • wget http://sourceforge.net/projects/cmusphinx/files/pocketsphinx/0.8/pocketsphinx-0.8.tar.gz
• Unzip:
  • tar -xzf sphinxbase-0.8.tar.gz
  • tar -xzf pocketsphinx-0.8.tar.gz
• Generate configuration files. In the sphinxbase-0.8 directory:
  • ./autogen.sh
  • make
  • make install
• Repeat in pocketsphinx-0.8 directory.
• test is out
  • src/programs/pocketsphinx_continuous -samprate 48000

megahal

• try it -

supercollider

• try this: http://wiki.linuxaudio.org/wiki/raspberrypi

others

• installing on rpi: http://sam.aaron.name/2012/11/02/supercollider-on-pi.html
• example install directory: /usr/share/doc/supercollider/examples/
• http://new-supercollider-mailing-lists-forums-use-these.2681727.n2.nabble.com/SC-on-Beagle-Board-Raspberry-Pi-td7581949.html
• satellite CCRMA - https://ccrma.stanford.edu/wiki/Satellite_CCRMA_First_Steps

nltk

• http://www.raspberrypi.org/phpBB3/viewtopic.php?f=9&t=6097
• install setup tools
  • wget https://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg#md5=fe1f997bc722265116870bc7919059ea
  • sudo sh setuptools-0.6c11-py2.7.egg
• install pip
  • sudo easy_install pip
• install numpy (precompiled binary)
  • sudo apt-get install python-numpy
• install nltk
  • sudo pip install nltk --upgrade
• run nltk
  • run python then type import nltk

OpenCV

• http://www.technolabsz.com/2013/03/how-to-easily-install-opencv-on.html

hd video playback

• omxplayer http://elinux.org/Omxplayer
  • play a file: omxplayer -o hdmi ~/Movies/robot_playing_catch.mp4
• play script: http://www.raspberrypi.org/phpBB3/viewtopic.php?t=9789&p=112154

Video

• RPi video looper - http://www.timschwartz.org/raspberry-pi-video-looper/

OSC

liblo

To use liblo to write an OSC client and server in C, first install the liblo development package on both the computer you would like to broadcast from (the client) and the computer that will receive the messages (the server). Using APT: apt-get install liblo-dev

Then, visit http://liblo.sourceforge.net/ and navigate to the example code or documentation. The example code provides a simple client and server. If you're just copying and pasting these, and would like to quickly compile them and test that they work, do the following for the server:

wget http://liblo.sourceforge.net/examples/example_server.c
gcc -o server example_server.c -llo
./server

And for the client:

wget http://liblo.sourceforge.net/examples/example_client.c

Then on the line defining an lo_address, change NULL to the IP address of your server. Finally

gcc -o client example_client.c -llo
./client

If you've done everything successfully, you should see a variety of sample output from the running server program.

receive osc messages through puredata pd

• https://www.youtube.com/watch?v=ZBX7UzXTmd4
• execute shell commands http://puredata.hurleur.com/sujet-9005-inteface-shell-scripts

pyOSC

• http://www.raspberrypi.org/forums/viewtopic.php?t=59714&p=446513

Graphics

OpenGL

Using OpenGL on the Raspberry Pi appears to be pretty idiosyncratic. For instance, see https://benosteen.wordpress.com/2012/04/27/using-opengl-es-2-0-on-the-raspberry-pi-without-x-windows/. Don't be misled by what is described on that webpage. While correct, far simpler example projects exist on the Raspberry Pi at /opt/vc/src/hello_pi. These are very useful! Read the README there, and get cracking. To get started, you can build every project by running:

sh rebuild.sh

If you would only like to build a subset of the projects, first cd to /opt/vc/src/hello_pi/libs, and build each library included there. Specifically:

cd /opt/vc/src/hello_pi/libs/ilcient && make
cd ../vgfont && make

After these libraries are built, you can then cd to each example project, make, and run the resultant binary file. Please note that these instructions are repeated in the included README file.

Pi Camera

• getting started - http://www.raspberrypi.org/archives/3890
• code: https://github.com/raspberrypi/userland/tree/master/host_applications/linux/apps/raspicam

taking photos with raspistill

raspistill -o image.jpg

• faster photo: https://bitbucket.org/niklas_rother/rasperry-pi-userland/raw/master/host_applications/linux/apps/raspicam/raspifastcamd_scripts

taking video with raspivid

• take a video

raspivid -o video.h264

• Convert to mp4

ffmpeg -i video.h264 -vcodec copy video.mp4

new video modes

• http://www.raspberrypi.org/new-camera-mode-released/
• install rpi-update:

sudo apt-get install rpi-update

• update:

sudo rpi-update

• exploring camera modes:

v4l2-ctl -p 90

 v4l2-ctl -v width=640,height=480,pixelformat=H264

 v4l2-ctl --stream-mmap=3 --stream-count=900 --stream-to=test90fps.h264

• half resolution, binned:

raspivid -w 1296 -h 972 -t 10000 -o pi_0.h264

• 90 frames per second VGA:

raspivid -w 640 -h 480 -fps 90 -t 10000 -o test90fps.h264

streaming the pi camera

• RPi:

raspivid -t 999999 -o - | nc 192.168.2.31 5001

• Laptop:

nc -l 5001 | mplayer -fps 31 -cache 1024 -

• low-latency: http://blog.tkjelectronics.dk/2013/06/how-to-stream-video-and-audio-from-a-raspberry-pi-with-no-latency/

python interface (picam)

• http://www.raspberrypi.org/learning/python-picamera-setup/

motion-triggered capture

• PIR triggered (motion triggered) camera
• PIR sensor - http://www.raspberrypi.org/learning/parent-detector/
• launch python script in detached screen session:

sudo screen -dmS mocap /home/pi/code/housemachine/pircam.py

• reconnect to screen:

sudo screen -r mocap

• copy new video files:

rsync -va --ignore-existing pi@office.local:~/videos/pircam/ ~/Pictures/ceiling_fisheye/

• mmal opencv modetect
• set recording format in code.
• with motion detection opencv - http://www.sodnpoo.com/posts.xml/raspberrypi_camera_with_opencv_motion_detection_and_recording.xml
• https://github.com/sodnpoo/rpi-mmal-opencv-modetect
• run in terminal and save motion frames to video:

 ./mmal_opencv_modect > video.h264

wrap h264 then combine two files

• concat first and second half:

avconv -i concat:a.h264\|b.h264 -c copy sum.h264

• wrap as h264 (with avconv):

avconv -i sum.h264 -vcodec copy sum2.mp4

• wrap as h264 (with ffmpeg):

ffmpeg -i sum.h264 -vcodec copy sum.mp4

alternate lens mounts

• Adding an M12 mount: http://wiki.raspberrytorte.com/index.php?title=Camera_Module_Lens_Modifcation#Lens_Mount_Modification

Wolfson Audio

• update wolfson audio drivers - https://blog.georgmill.de/2015/02/18/update-for-wolfson-audio-card-on-raspberry-pi/
• Command line recording - http://www.element14.com/community/community/raspberry-pi/raspberrypi_projects/blog/2014/04/06/wolfson-audio-project

Jack from OSX to Raspberry Pi

On Raspberry Pi:

• wolfson script to select audio output:

Playback_to_Lineout.sh

amixer -Dhw:0 cset name='HPOUT2 Digital Switch' on
amixer -Dhw:0 cset name='HPOUT2L Input 1' AIF1RX1
amixer -Dhw:0 cset name='HPOUT2L Input 1 Volume' 32
amixer -Dhw:0 cset name='HPOUT2R Input 1' AIF1RX2
amixer -Dhw:0 cset name='HPOUT2R Input 1 Volume' 32

• run dbus:

eval dbus-launch --auto-syntax

• copy results and export them:

export DBUS_SESSION_BUS_ADDRESS= ...
export DBUS_SESSION_BUS_PID= ...

• start jackd:

jackd -R -T -p 32 -d alsa -n 3 -p 2048 -r 44100 -i2 -o2 &

• start netone pointed to slave IP:

jack_netsource -H 192.168.0.104 &

On OS X:

• configure jack for necessary outputs (only done once) (2 in 2 out)
• qjackctl with netone backend

On Pi:

• route jack signals:

jack_connect netjack:capture_1 system:playback_1
jack_connect netjack:capture_2 system:playback_2

• jack routing - https://gist.github.com/nyarla/36724e8931fa6bc244a0
• https://github.com/jackaudio/jackaudio.github.com/wiki/WalkThrough_User_NetJack2

Hardware Peripherals

Verified Peripherals - http://elinux.org/RPi_VerifiedPeripherals

C-Media USB sound device

• setting up with alsamixer, etc - http://asliceofraspberrypi.blogspot.com/2013/02/adding-audio-input-device.html
• setup C-media usb sound device - http://www.cpmspectre.pwp.blueyonder.co.uk/raspberry_pi/MoinMoinExport/DaffodilUSBSoundAdapter.html

U9 MiniMic

arecord -f dat | aplay -f dat &

C920

• USB packet loss (90% of frames)
  • http://www.raspberrypi.org/phpBB3/viewtopic.php?t=29879
  • beagleboard http://www.oz9aec.net/index.php/gstreamer/473-using-the-logitech-c920-webcam-with-gstreamer
  • http://www.oz9aec.net/index.php/beaglebone/476-turning-the-beaglebone-into-a-high-definition-ip-camera#comment-678839135

microline 320 printer

installing

• install cups
  • sudo apt-get install cups
  • willtake a little while
• install menu item:
  • sudo apt-get install system-config-printers
• reboot
• add printer
  • start ltxde:
    • startx
  • Select Menu->Preferences->Printing
  • Printer should autodetect. Or you can enter the URI manually: parallel:/dev/usblp0
  • Change model to Generic, type Raw. This will pass raw data to printer.
• http://ubuntuforums.org/showthread.php?t=1436079&page=2

command line

• printing
  • cat myTextFile.txt | lp -oraw
• list printers
  • lpstat -p -d
• lp help http://www.cups.org/documentation.php/options.html

Wireless Adapters

• Adafruit adapter: https://learn.adafruit.com/setting-up-a-raspberry-pi-as-a-wifi-access-point/install-software
• LB-Link with mt7601: https://www.raspberrypi.org/forums/viewtopic.php?t=49864
  • for kernel 3.18.7-v7: https://dl.dropboxusercontent.com/u/80256631/mt7601-3.18.7-v7-755.tar.gz

GPIO

• pin over-voltage protection circuits - http://elinux.org/RPi_Tutorial_EGHS:GPIO_Protection_Circuits
• light example - https://projects.drogon.net/raspberry-pi/gpio-examples/tux-crossing/gpio-examples-1-a-single-led/
  • uses wiringPI, command line tool, for ex:gpio
  • installed using git - https://projects.drogon.net/raspberry-pi/wiringpi/download-and-install/

through python

• follow adafruit - http://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/overview
  • Rpi.GPIO -
  • requires python-dev
  • python-rpi.gpio
• https://code.google.com/p/raspberry-gpio-python/

Logic Level Conversion

• RPi is 3.3V.

untested

• Processing - http://forum.processing.org/topic/processing-on-raspberry-pi
• webcam streaming - http://sirlagz.net/2012/08/04/how-to-stream-a-webcam-from-the-raspberry-pi/
• opencv - http://mitchtech.net/raspberry-pi-opencv/
• julius - http://www.aonsquared.co.uk/raspi_voice_control

Applications

Use as AirPlay receiver

• http://lifehacker.com/5978594/turn-a-raspberry-pi-into-an-airplay-receiver-for-streaming-music-in-your-living-room
• http://www.raywenderlich.com/44918/raspberry-pi-airplay-tutorial

Problems

• raspberry pi resets audio device after recording begins. similar to this complaint - http://www.raspberrypi.org/phpBB3/viewtopic.php?t=12086&p=135385

Course of Instruction

• week 1
• week 2
• Raspberry Pi - Week 3
• Raspberry Pi - Week 4