Contents - Raspberry PI Community Projects

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Red power LED is blinking The red power LED should never blink, because it is hard-wired to the 3.3V power supply rail. If it is blinking, as one user has reported [1] it means the 5V power supply is dropping out. Use a different power supply. Red power LED is on, green LED does not flash, nothing on display ▪ The Raspberry Pi cannot find a valid image on the SD card. Check card is inserted correctly. Check that you have correctly written a Raspberry Pi image to the card. Insert the SD card into a Windows machine and you should see bootcode.bin, loader.bin and start.elf amongst others. See also, Known SD Cards. ▪ Try with no cables connected except the USB power lead, and SD card inserted. You should see flashing of the OK light for ~20 seconds. If that helps, plug in cables one at a time to identify which is interfering with boot. ▪ The voltage is too low (below 5 V), try a different power supply and/or cable. The R-Pi needs a supply rated for 700 mA or more. Some supplies labeled as such cannot actually provide their rated current while maintaining 5V. See also, #Troubleshooting_power_problems. ▪ There is a bug in the distributed version of bootcode.bin which causes problems with some sdcards. Try this version: https://github.com/raspberrypi/firmware/ blob/234c19de7cbaaf4997671d61df20a05759066295/boot/bootcode.bin. Please let us know if it "fixes" your non-working SD card (or, more importantly, if it doesn't). This can also manifest itself as intermittent booting, or only booting when cold. ▪ (unlikely) hardware abuse, for example by connecting a 7 V supply to a 3v3 GPIO output pin [2] or powering up the board after a solder splash shorts some traces [3] . ▪ Look at the SD card holder on the Raspberry Pi carefully. At first glance it may look fine but the contacts must be springy and they must protrude at least 2mm as measured from the lower edge of the holder to the top of the contact bulge. This happens due to the solder process and the type of holder used. Some of the solder residue falls into the contact cavity restricting the springiness and the height that the contact protrudes. You can fix this yourself but remember you can void your warranty. The contacts are delicate so be carefull. Insert a needle pin under the contact bulge and pull lightly up until the one end of the contact unclips. Clean the cavity where the contact unclipped from of any solder or other residue by blowing into the cavity. Clip the contact back into the cavity by lightly pushing it into the cavity. Do this for all the contacts. Look at these photos. Media:SDcardHolder.JPG, Media:UnclipContact.JPG, Media:UnclippedContact.JPG
Green LED blinks in a specific pattern With recent firmware, according to this forum post (http://www.raspberrypi.org/phpBB3/ viewtopic.php?f=28&t=8725#p103338) the green light will blink in a specific pattern to indicate some types of errors: ▪ 3 flashes: loader.bin not found ▪ 4 flashes: loader.bin not launched ▪ 5 flashes: start.elf not found ▪ 6 flashes: start.elf not launched If start.elf won't launch it may be corrupt and can be replaced with arm240_start.elf or any of the other armXXX_start.elf files. Coloured splash screen With recent firmware, a coloured splash screen is displayed after firmware (start.elf) is loaded. This should be replaced by linux console a second later. However if the coloured screen remains, it suggests the kernel.img file is failing to boot. Try replacing it with a known good one. Immediately after displaying the splash screen, the PI starts consuming a little more current, if the PI resets at that moment its an indication that your PSU isn't able to deliver the full current your PI requires, but dips its output voltage below a minimum when loaded with the full current the PI needs. Kernel Panic on boot Text appears on screen, but then hangs with debug messages. This can be caused by USB devices such as keyboards. Try again with nothing in the USB.
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RPi Buying Guide From eLinux.org Co
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Farnell Worldwide Premier Farnell a
Page 5 and 6: Q: If interest was obviously so hig
Page 7 and 8: limited to batches of only 10k Rasp
Page 9 and 10: References 1. ↑ http://en.wikiped
Page 11 and 12: SD Card setup To boot the Raspberry
Page 13 and 14: Copying the image to an SD Card on
Page 15 and 16: 1. These commands and actions need
Page 17 and 18: ▪ dd bs=4M if=~/2012-09-18-wheezy
Page 19 and 20: Model: SD SD08G (sd/mmc) Disk /dev/
Page 21 and 22: RPi Hardware Basic Setup From eLinu
Page 23 and 24: NOTE: An RPi SD card can only be us
Page 25 and 26: 1. Micro-B USB Power Cable (see abo
Page 27 and 28: One promising device is the Cymbet
Page 29 and 30: External Links For a verbose guide
Page 31 and 32: This page is a community work in pr
Page 33 and 34: ===================================
Page 35 and 36: NOTE: If the partitions (/dev/sdc1
Page 37 and 38: Setting up for remote access / head
Page 39 and 40: continue to be able to address it i
Page 41 and 42: An alternative startup guide for be
Page 43 and 44: Where to start? Any easy question t
Page 45 and 46: If you're unsure of which locale to
Page 47 and 48: Debian Wheezy, using raspi-config D
Page 49 and 50: Media Player With this configuratio
Page 51 and 52: ▪ Entering "sudo apt-get install
Page 53 and 54: Tutorials - Guides - Projects - Tas
Page 55: ▪ 5.5 Networking no longer works
Page 59 and 60: can only handle 100mA per USB slot
Page 61 and 62: Get the latest firmware version The
Page 63 and 64: Ethernet connects at 10M instead of
Page 65 and 66: Some programs refuse to accept my p
Page 67 and 68: Display Startx fails to start If yo
Page 69 and 70: overscan_bottom=20 Interference vis
Page 71 and 72: Composite displays no image The out
Page 73 and 74: Troubleshooting power problems If y
Page 75 and 76: Hardware versions/revisions Several
Page 77 and 78: Raspberry Pi Model Wizard - Buying
Page 79 and 80: # Set monitor mode to DMT hdmi_grou
Page 81 and 82: hdmi_drive=1 Normal DVI mode (No so
Page 83 and 84: hdmi_mode=46 1440x900 reduced blank
Page 85 and 86: opt/vc/bin/tvservice -d edid.dat /o
Page 87 and 88: Overclocking options Option Descrip
Page 89 and 90: GPU core, h264, v3d and isp should
Page 91 and 92: RPi Hardware From eLinux.org Conten
Page 93 and 94: Low-level peripherals: Real-time cl
Page 95 and 96: core clocked at 700MHz; ARM VFP. Th
Page 97 and 98: Power ▪ High-resolution PCB front
Page 99 and 100: the RPI itself, sometimes up to hal
Page 101 and 102: Things that can cause problems ▪
Page 103 and 104: Capacitor C6 (ringed) It's unlikely
Page 105 and 106: RPi HardwareHistory From eLinux.org
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Raspberry Pi Model-B Full Productio
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Raspberry Pi Alpha Board ▪ Announ
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10. ↑ (hand-mod) More on the beta
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Introduction In addition to the fam
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Each GPIO can interrupt, high/low/r
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Colour legend +5 V +3.3 V Ground, 0
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GPIO06 is LAN_RUN and is available
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GPIO Code examples GPIO Driving Exa
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); BLOCK_SIZE, PROT_READ|PROT_WRITE
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# Set up GPIO 7 and set to input ec
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gcc -o blink -I ../../src ../../src
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GPIO Driving Example (Ruby) This ex
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Model Wizard - Buying Guide - SD Ca
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Back to the Hub. Contents ▪ 1 Int
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AFLEX Robotic Board AFLEX Robotic B
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Pi232 RS232 board Pi232 (http://www
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MiniPiio Relay2 [7] (http://zuzebox
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line in it for commands. The interf
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RPi Screens From eLinux.org Back to
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http://www.hdfury.com/ Something si
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Nokia N8 has AMOLED 360x640 pixels
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RPi Cases From eLinux.org Back to R
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Back to the Hub. ▪ 32.5 Customiza
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Lego Case 2 I had a bit of a play i
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This unique case has an integrated
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The foldable case from "Andrew K" (
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Both bottom and top of the case are
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ModMyPi - Raspberry Topping Case Mo
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RepRap friendly cover for Raspberry
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Design One (http://www.thingiverse.
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FoamBox1.png FoamBox2.png FoamBox3.
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PI Sandwich Case BUD Industries is
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▪ Customizable! ▪ Nearly Indest
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The PiSlab is made from a slab of 1
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Options 4 Different Design Access t
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Polycase Pi Series Case The new Pi
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Tek Berry.40 Length: 100.6 Width: 7
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Raspberry Pi Model Wizard - Buying
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Back to the Hub. Contents ▪ 1 Not
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▪ (B) - Relates to model B produc
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▪ F5U706ea/uk 2-in-1 Hub (USB 2.0
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▪ Logik L4THUB10 4 Port powered h
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Problem USB Hubs Please check known
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thing is that RPi powers on when I
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▪ A4 Tech ▪ Model KL-5 USB Keyb
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▪ EBO-013 Wireless 2.4GHz compact
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▪ Comfort Wave 450, labeled 100mA
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▪ ONN Keyboard Stock No: ONA11HO0
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▪ Trust 17916 Compact Wireless En
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▪ G510 Gaming Keyboard - lagging
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▪ DX-WMSE (100mA) (B) ▪ Fellowe
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▪ Samsung model:AA-SM3PCPB usb Op
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USB WiFi Adapters See also: http://
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▪ Belkin Components F7D1101 v1 Ba
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▪ Edimax ▪ EW-7811Un (http://ww
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▪ MSI ▪ Micronet SP907NS, 11N W
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▪ SMC ▪ SMCWUSBS-N : Hardware d
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Wheezy) as it includes the needed 8
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▪ Apple ▪ Apple USB Ethernet Ad
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Tested on Raspbian and Archlinux. D
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▪ Webcam C100 Model Number V-U001
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correctly on boot. You may need to
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USB RFID Reader JTAG ▪ Unbranded
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▪ Universal USB Wall Charger (5V
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▪ RS Components' ▪ HNP06UK (RS
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Display adapters Note that active c
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hdmi_mode=36 disable_overscan=1 Acc
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Working SD Cards ▪ 4GB SDHC Class
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▪ 8GB SDHC Class 4 (doesn't reboo
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▪ Mushkin ▪ 16GB SDHC Class 10
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▪ 32GB SDHC Class 10 (MB-SSBGA, M
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(http://www.amazon.co.uk/gp/product
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▪ 32GB SDHC Class 10 (http://www.
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▪ 4GB SDHC Class 4 — hasn't wor
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(http://www.raspberrypi.org/phpBB3/
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We're not currently using a bootloa
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Performance Performance Page Progra
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Back to the Hub. Software & Distrib
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Fedora Remix (http://fedoraproject.
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Wiki & Main site (http://androidpi.
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The generally small system that pro
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ha-pi ▪ Main Site (https://source
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FreeBSD Details and install guide o
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GeeXboX ARM GeeXboX is a free and O
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RPi Kernel Compilation From eLinux.
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From a foreign machine Firmware cd
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From opensource.apple.com, download
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Tutorials - Guides - Projects - Tas
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CPU Linpack The Arm has been tested
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Reps Time(s) DGEFA DGESL OVERHEAD K
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cast cbc 5068.25k 6020.03k 6345.71k
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armhf "driver info" : http://i.imgu
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Extrememory SDHC 16GB class 10 (man
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Patriot SDHC 32GB Class 10 UHS-1 (P
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SanDisk SDHC 32GB class 6 SanDisk u
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Sandisk Ultra SDHC I Class 6 ("30MB
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65.1 + 48.8 69.5 + 29.1 90.8 + 91.4
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RPi Programming From eLinux.org Bac
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Graphical Programming ▪ Gambas (h
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Tutorials - Guides - Projects - Tas
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Kernel Compilation - advice on comp
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ilclient helper library This librar
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egistry/egl/specs/eglspec.1.4.20110
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specs/openvg-1.1.pdf) or the API qu
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RPi Tutorials From eLinux.org
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Community Pages: Tutorials - a list
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DracoSoftware (http://dracosoftware
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5V Power Supply construction - How
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Live mp3 streaming from audio-in wi
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RPi Guides From eLinux.org Back to
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web browser Easy Suitable for begin
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Installing Ruby on Rails Share your
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Using Skypekit Pre-configuring SD c
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RPi Projects From eLinux.org Back t
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BerryTerminal (http://www.berryterm
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Digital Signage Retrieved from "htt
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The Raspberry Pi Foundation is a UK
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5. Optional USB driver for 2-device
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R-Pi System/Data Management --Meltw
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101-200 Raspberry Pi Foundation ann
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RPi Education From eLinux.org Conte
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Computer History Museum, Silicon Va
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used for Desktop apps, Daemon/Servi
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fundamentals of computer programmin
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▪ https://github.com/ntoll/Raspbe
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RPi Community From eLinux.org Back
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▪ RasPi Forums on EduGeek.net (ht
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References 1. ↑ http://www.pyroso
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