Pandora Wiki - User contributions [en]

USB compatibility list

2011-05-13T14:16:11Z

MichaelXX2: /* DVD/CD Drives */ Add another one

For a more general idea of what will work on the Pandora, check the [[USB reference]] page.

==Devices==

===Networking===
Please see the [[Mobile broadband]] page for tips on how to get these working, as well as [http://www.gp32x.com/board/index.php?/topic/54318-guide-mobile-broadband-usb-stick-usage/ this tutorial] from the GP32X forum.

====HSDPA (3G) Modems====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Huawei E156G
| Not required
| standard-A
| USB 2.0
| ?
| standard-A port
| Yes
| Yes
| source: [http://www.gp32x.com/board/index.php?/topic/52827-3gumts-usb-dongle/page__view__findpost__p__835681]
|-
| Huawei E160
| Not required
| standard-A
| USB 2.0
| 250mA
| standard-A port
| Yes
| Yes
|
|-
| Huawei E160E
| Not required
| standard-A
| USB 2.0
| 250mA
| standard-A port
| Yes
| Yes
|
|-
| Huawei E1750
| Not required
| standard-A
| USB 2.0
| ?
| standard-A port
| Yes
| Yes
| source: [http://www.gp32x.com/board/index.php?/topic/54318-guide-mobile-broadband-usb-stick-usage/page__view__findpost__p__939350]
|-
| Huawei E220
| Not required
| standard-A
| USB 1.1
| 250mA
| standard-A port via High Speed hub
| Yes
| Yes*
| *The successful E220 tests were done by DJWillis on an old kernel (long before Pandora shipped). It seems that they are NOT working any more.
|-
| 4G-Systems XS Stick P14
| Not required (usbserial module)
| standard-A
| USB 2.0
| unknown
| standard-A port
| Yes
| Yes
| Source: [http://www.gp32x.com/board/index.php?/topic/54318-guide-mobile-broadband-usb-stick-usage/page__view__findpost__p__937681]<br/>Requires usbmodeswitch program.
|-
| iPhone 3GS (Probably also 1G/3G)
| ipheth
| standard-A
| USB 2.0
| 500mA
| USB A
| Yes, works.
| Yes, works.
| Requires a good bit of dependencies to get working. Tested with Debian from SD, but should work in Angstrom with some work. The ipheth wwan0 device only provides a connection over the 3G modem, even if you're connected to a wifi network. I used the iproxy and SSH tunneling method with proxychains to get to the wifi network.
|
|-
| HTC Desire
| not required
| standard-A
| USB 2.0
| 500mA
| USB A
| Yes, works.
| Yes, works.
| Requires internet connection sharing to be enabled from the phone.
|}

====USB to Ethernet adapters====

To enable USB Ethernet adapters on the Pandora, you may need to left-click the networking icon on the panel in Xfce, and select "Ifupdown (bnep0)".

{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Apple USB Ethernet Adapter MB442Z/A
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| Works perfectly on the Pandora. Reportedly uses an ASIX AX88xxx chipset.
|-
| Wii USB 2.0 10/100M adapter (use [http://www.asix.com.tw/products.php?op=pItemdetail&PItemID=86;71;101 ASIX AX 88772 USB 2.0 chip])
| Not required
| standard-A
| USB 2.0
| 250mA
| standard-A port
| Yes
| Yes
| ID 0b95:7720 ASIX Electronics Corp. AX88772 . Works perfectly on the Pandora. This clone from [http://www.dealextreme.com/details.dx/sku.5926 DealExtreme] works too.
|-
| Connectland USB 2.0 10/100M Ethernet Adapter
| Not required
| standard-A
| USB 2.0
| 250mA
| standard-A port
| Yes
| Yes
| ID 0b95:7720 ASIX Electronics Corp. AX88772 - Works fine, Sometimes a reboot is necessary (ZaxxonHF5RC1).
|-
| Belkin Gigabit USB 2.0 Network Adapter
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| Works fine, the shape of it make is a bit awkward to fit if you connect it directly, but it has a short adapter cable. I only get ~95Mbit on a gigabit network, but then the pandora's cpu maxes out. (it may be that the driver/usb stack isn't very well optermised), has horribly bright blue led's.
|-
| MosChip MCS7830 USB 10/100 Ethernet adapter
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| ID 9710:7830 MosChip Semiconductor MCS7830 10/100 Mbps Ethernet adapter. Kernel module: mcs7830.
|-
| EU.MARK USB 10/100M RJ45 Ethernet Network Adapter Dongle
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| Works on Pandora (plug and play) - USB ID: 9710:7830 - bought from [http://www.dealextreme.com/details.dx/sku.22684 DealExtreme]
|-
| Digitus DN-10050 Fast Ethernet USB Adapter
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| Another MosChip MCS7830 based adapter. USB ID 9710:7830.
|-
| Edimax EU-4230 Fast Ethernet USB Adapter with 3-port USB hub
| Not required
| standard-A
| USB 2.0
|
| standard-A port
| Yes
| Yes
| Works with Pandora. Ethernet USB ID 0b95:772a ASIX Electronics Corp. 3-port USB2.0 hub USB ID 0409:005a NEC Corp. (comes supplied with a power adapter for USB hub)
|}

====USB WiFi adapters====
The Pandora stock kernel doesn't seem to come with any wireless driver support outside of the internal wifi chip. The only way you'll get wireless working is to build your own kernel with it included or try [http://wireless.kernel.org/en/users/Download compat-wireless].

{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Belkin N1 Wireless USB Adapter (F5D8051) ("Ver. 2053") (MARVELL v1021)
| N/A
| Standard-A
| USB 2.0
|
| Not connecting it at all.
| Reported to work with ndiswrapper.
| No native driver support and ndiswrapper obviously won't work.
| There's a previous revision of this dongle which is supposed to have a Ralink chip, but they revised it and put a different chip inside.
|-
| Cisco/Linksys AE1000 High Performance Wireless-N USB Adapter
| rt3572sta (RT3572USB)
| Standard-A
| USB 2.0
|
| USB A
| Reportedly works.
| Works with a modified driver.
| (Compiled module for pandora:[http://boards.openpandora.org/index.php?/topic/1992-linksys-ae1000-usb-wifi/ pandora forum]) Download the driver from [http://www.ralinktech.com/support.php?s=2 ralink's driver site], edit ./common/rtusb_dev_id.c, before "#endif // RT2870" add "{USB_DEVICE(0x13B1,0x002F)},", compile.'
|}

See also this thread [[http://www.gp32x.com/board/index.php?/topic/55570-new-pandora thread]] on the forums for the latest.

===Storage===
----

====External Hard Disk Drives====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! style="min-width: 120px" | Works
! Additional comments
|-
| LaCie Rikiki 250GB USB 2.0 2.5" Hard Drive
| Not required
| standard-A
| USB 2.0
| Unknown
| standard-A port via powered High Speed Hub
| {{no|Not working on Pandora}}
| This drive does not work on a Pandora. Not only does it fail to spin up, but it causes the Pandora's screen to pulsate wildly, much like an old CRT would if you placed a speaker or a magnet near to it. I have not yet tested this with a powered hub.
|-
| Verbatim 250GB Model #47580 Hard Drive
| Not required
| direct
| USB 2.0
| Unknown
| direct
| {{yes|Works on Pandora}}
| Tested by [http://www.gp32x.com/board/index.php?/topic/54509-dont-use-lacie-25-usb-hard-disk-drives-with-a-pandora/page__view__findpost__p__877512 almatuk]. "worked an absolute treat when plugged into the Pandora. Watched videos directly from it at full speed, no need for powered USB hub. Had issues playing roms directly off it however as it was formatted NTFS. I'm sure if I formatted to FAT32 these would disappear."
|-
| Western Digital 160GB Elements External USB 2.0 2.5" Hard Drive
| Not required
| standard-A
| USB 2.0
| Unknown
| standard-A port via powered High Speed Hub
| {{yes|Works on Pandora}}
| This drive works just fine with the Pandora.
|-
| Western Digital 250GB Elements Portable USB 2.0 2.5" Hard Drive
| Not required
| standard-A
| USB 2.0
| Unknown
| Direct or standard-A port via High Speed Hub
| {{Yes|Works on Pandora}}
| Works perfectly fine with Pandora.
|-
| Western Digital 250GB My Passport Essential USB 2.0 2.5" Hard Drive
| Not required
| direct?
| USB 2.0
| Unknown
| direct?
| {{Partial|Maybe}}
| Tested by [http://www.gp32x.com/board/index.php?/topic/54509-dont-use-lacie-25-usb-hard-disk-drives-with-a-pandora/page__view__findpost__p__877386 TheDarkSpectrum48K]. "Works perfectly!", but the 2nd time it [http://www.gp32x.com/board/index.php?/topic/54509-dont-use-lacie-25-usb-hard-disk-drives-with-a-pandora/page__view__findpost__p__882635 didn't work].
|-
| Western Digital 400GB My Passport Essential USB 2.0 2.5" HDD model WDME4000TE
| Not required
| standard-A
| USB 2.0
| Unknown
| Direct
| {{yes|Works on Pandora}}
| Tested by [http://www.gp32x.com/board/index.php?/user/14534-peca/ Peca]. "Works perfectly!"
|-
| Western Digital 1TB My Passport Essential SE External USB 2.0 2.5" Hard Drive
| Not required
| standard-A
| USB 2.0
| Unknown
| Direct or through powered High Speed Hub
| {{yes|Works on Pandora}}
| Tested by [http://http://www.gp32x.com/board/index.php?/user/19191-mycohl/ Mycohl] This drive works without problems. Externally powered hub recommended to conserve battery power.
|-
| Seagate Seagate® Expansion™ External Drives
| Not required
| standard-A
| USB 2.0
| Unknown
| Direct
| {{no|Not working on Pandora}}
| Tested by [http://www.gp32x.com/board/index.php?/user/14781-hitnrun/ Hitnrun]. "Isn't even detected in lsusb (drive powered by external power source)"
|-
| Freecom 250GB 2.5" portable
| Not Required
| standard-A
| USB 2.0
| Unknown
| Direct
| {{yes|Works on Pandora}}
| Just works perfectly when plugged into the Pandora. Inside it's a Samsung Model HM251JX so I guess anything based on that will also work OK.
|-
| Western Digital Elements 2TB 3.5" Hard Drive Model:WDBAAU0020HBK
| Not Required
| standard-A
| USB 2.0
| Unknown
| Direct
| {{yes|Works on Pandora}}
| Tested by [http://boards.openpandora.org/index.php?/user/430-kilowatt/ kilowatt]. No problems, works fine with Pandora.
|}

====DVD/CD Drives====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Lite-On EZ-DUB DVD/CD Multi-Recorder (Model eZAU120)
| Not required
| standard-A
| USB 2.0
| Powered by included mains adapter - DC 12V 1.8A
| standard-A port
| Yes
| No
|
|-
| Memorex 20x Multi Format DVD Recorder External - DVD±RW (±R DL)
| Not required
| standard-A
| USB 2.0
| Powered by included mains adapter
| standard-A port
| Yes
| Yes - works flawlessly
|
|}

===Video display device===
----

====VGA DVI HDMI adapter====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Output connectors
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
|
|
|
|
|
|
|
|
| No device tested yet
|}
====External graphic card====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Output connectors
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Tritton see2 usb 2.0 to SVGA adapter
| sisusb
| USB
| USB 2.0
| reduces Pandora's battery life in half (10h → 4h)
| VGA (D-SUB)
| Yes
| Yes
| needs to be integrated with preferences, currently I must edit xorg.conf and mess with xinerama. Isn't too fast either, dragging a window is bearable, but forget about hi-res video. Good for presentations.
|}

===Video capture device===
----

====Webcams====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"

|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Exoo No Driver/USB 2.0 Webcam (Model No.: M053)
| Not required
| standard-A
| USB 2.0
| Unknown
| standard-A port
| Yes
| No
| Bought from [http://www.dealextreme.com/details.dx/sku.14991 DealExtreme]
|-
| Logitech Quickcam Communicate Deluxe
| Not required
| standard-A
| USB 2.0
| Unknown
| standard-A port
| Yes
| No
| USB ID: 046d:0992, works though [http://linux-uvc.berlios.de/ uvcvideo]
|-
| Logitech HD Webcam C270 720p
| Not required
| standard-A
| USB 2.0
| 500mA
| standard-A port
| Yes
| Yes
| ID 046d:0825 Logitech, Inc. Impressive. Works out of the box flawlessly. Audio recognized, but not tested. More info to come.
|}

===Audio devices===
----

====MIDI controllers====
EvilDragon bundled the usb MIDI class drivers in the default firmware image, therefore ANY class-compliant MIDI device should work with the Pandora, out of the box.[http://www.gp32x.com/board/index.php?/topic/58523-zynaddsubfx/page__view__findpost__p__938432]

{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Works on Pandora
! Additional comments
|-
| Akai LKP25
| Not required
|
|
|
|
| {{Yes}}
| [http://www.gp32x.com/board/index.php?/topic/58523-zynaddsubfx/page__view__findpost__p__938432 source]
|-
| M-Audio MIDISPORT 2x2 Anniv
| Not required
|
|
| 400mA
|
| Not tested
| ID 0763:1050 Midiman. Such a current draw :/
|-
|}

====Microphones/recorders====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Works in Linux
! Works on Pandora
! Additional comments
|-
| Zoom H2 Handy Recorder
| not required
| standard-A
| USB 1.1
| 300mA
| USB hub
| Yes
| Yes
| Can record into Audacity, but won't be recognized unless connected through USB hub.[http://www.gp32x.com/board/index.php?/topic/59301-audacity-1-3-12/page__view__findpost__p__947602]
|}

====USB audio controllers====
Aka. "professional soundcard"; see [http://en.wikipedia.org/wiki/Sound_card#Professional_soundcards_.28audio_interfaces.29 definition on Wikipedia].
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Cakewalk UA-1G
| not required
| standard-A
| USB 2.0
| 200mA
| standard-A port
| Yes, not tested myself but widely reported to work
| Does not work yet
| ID 0582:00e9 Roland Corp. This device may be similar to older Edirol/Roland USB audio devices.
|}

===Input device===
----
Any HID ([http://en.wikipedia.org/wiki/Human_interface_device Human Interface Device]) compliant keyboard, mouse or game controller should work on the Pandora. Most of those device are low speed or full speed USB device and will need to be connected though either a USB OTG adapter/cable or a USB2 hub in order to work on the Pandora.

====External Game Controllers====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Suggested connection to Pandora
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| 2-TECH SNES-to-USB adapter
| Not required
| standard-A
| Low speed
|
| standard-A port via High Speed Hub
| Yes
| Yes
| USB description is "HuiJia USB GamePad", lsusb calls it "0e8f:3013 GreenAsia Inc."
|
|-
|-
| USB Super RetroPort (SNES-to-USB adapter)
| Not required
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| Bought from [http://www.retrousb.com/product_info.php?cPath=21&products_id=29 RetroZone]
|
|-
| USB RetroPort (NES-to-USB adapter)
| Not required
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| Bought from [http://www.retrousb.com/product_info.php?cPath=21&products_id=28 RetroZone]
|
|-
| Trio Linker Plus II (PlayStation,-GameCube,-and-Dreamcast-to-USB adapter)
| Not required
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| Bought from [http://www.play-asia.com/paOS-13-71-6m-49-en-70-1zfv.html Play-Asia]
|
|-
| NAZAR V47 USB Force Feedback Vibrating Gamepad Controller for PC
| Not required
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| Whether it really contains the claimed force feedback feature is unknown as this feature does not work under Linux - bought from [http://www.dealextreme.com/details.dx/sku.24551 DealExtreme]
|
|-
| 10-Fire-Button Double Vibration Feedback USB PC Arcade Joystick
| Not required
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| Whether it really contains the claimed force feedback feature is unknown as this feature does not work under Linux - bought from [http://www.dealextreme.com/details.dx/sku.27821 DealExtreme]
|
|-
| Official PlayStation 3 controller
| Not required
| standard-A
| Full speed
|
| USB A To Mini B Cable via High Speed Hub
| Yes
| No
| This is for USB not bluetooth compatibility. Sixaxis and DualShock not tested.
|-
| Thrustmaster Firestorm Digital 3 Gamepad
| Not required
| standard-A
| Low speed
|
| standard-A port via High Speed Hub
| Yes
| Yes
| ID 07b5:0213 Mega World International, Ltd Thrustmaster Firestorm Digital 3 Gamepad
|-
| Wired Xbox 360 Controller
| xpad module
| standard-A
| Unknown, probably USB 1.1
|
| standard-A port via High Speed Hub
| Yes
| No
| This also includes gamepads for PC that needs the Windows Xinput driver. Such gamepads include the Logitech Chillstream.
|-
| WiseGroup.,Ltd SmartJoy Dual PLUS Adapter (dual PSX to USB joypad adapter)
|
| standard-A
| Unknown
| 100mA
| Unknown
| Yes
| No
| ID 6677:8802
|}

====Graphics tablets====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"

|- style="background: #ececec"
! Device
! Driver
! Connector
! Supported standard
! Current draw
! Tested in Linux
! Tested on Pandora
! Additional comments
|-
| Bamboo Multitouch
|
|
|
|
|
| Yes
| [http://www.gp32x.com/board/index.php?/topic/54728-pandora-owners-tried-tablet/page__view__findpost__p__881806 Doesn't work]
|-
| Genius Tablet
|
|
|
|
|
| Yes
| [http://www.gp32x.com/board/index.php?/topic/54728-pandora-owners-tried-tablet/page__view__findpost__p__883140 Works via USB2 hub]
|-
| Wacom CTH-460
|
|
|
|
|
| Yes
| [http://www.gp32x.com/board/index.php?/topic/54728-pandora-owners-tried-tablet/page__view__findpost__p__924422 Doesn't work] - needs patched driver
|-
| Wacom Volito2 Tablet (Model: CTF-420)
| Not required
| standard-A
| Low speed
| 40 mA ([http://www.my-volito.com/volito/specs.asp?lang=en Source])
| Yes
| No
| USB ID: 056a:0062
|}

====Mice====
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Connector
! Works on Pandora
! Additional comments
|-
| Apple Mouse (M5769)
| USB
| {{No|No}}
| Seems to disable USB port, reboot afterwards required
|-
| Apple Mouse with Scroll Ball (A1152)
| USB
| {{No|No}}
| Seems to disable USB port, reboot afterwards required
|}

==Connectors, adapters, and hubs==
This section is intended as a general guide. Items in this section are standard USB accessories, so drivers are not required. Compatibility with Pandora is assumed. Please note that any external product links are provided for reference only, and are not an endorsement.

===OTG Adapters===
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Tested
! Additional comments
|-
| Generic adapter
| No
| [[http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=usb+otg+host+cable&_sacat=See-All-Categories Find on eBay]] [[http://www.amazon.co.uk/s/ref=nb_ss_ce?url=search-alias%3Delectronics&field-keywords=OTG+Cable+Adapter&x=3&y=23 Find on Amazon]] These links are not 100% accurate. Check for `mini-a`, and on ebay, the price is higher (like $8)
|-
| Nokia USB OTG adapter
| Yes
| [[http://www.electronicproductonline.com/catalog/product_info.php?cPath=35_67&products_id=2043 Electronic Product Online]]
|}

===Compact USB Hubs===
{|class="wikitable sortable" border="1" cellpadding="1" cellspacing="0" style="font-size: 90%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Device
! Tested
! Additional comments
|-
| Griffin SmartShare USB
| No
| [[http://www.griffintechnology.com/products/smartshare-usb Griffin website]]
|-
| Belkin F5U415 4 Port USB 2.0 Swivel Hub
| No
| Comes with an optional power adapter. [[http://catalog.belkin.com/IWCatProductPage.process?Product_Id=377085 Belkin website]]
|-
| Belkin F5U701 USB 2.0 7 Port Mobile Hub
| Works - pabloh
| Comes with an optional power adapter. [[http://www.belkin.com/IWCatProductPage.process?Product_Id=369788 Belkin website]]
|-
| ID 0e8f:0016 GreenAsia Inc.
| Not Working - tsh
| Labeled as high speed, from ebay
|-
|Trust 4 port netbook hub ID 05e3:0608
|Works - tsh
|http://www.amazon.co.uk/gp/product/B0025X16AS
|-
| HIGH SPEED 4 PORT MINI USB 2.0 HUB FOR LAPTOP PC (non powered)
| YES
| octopus style small cheap nonpowered USB hub from ebay [[http://cgi.benl.ebay.be/ws/eBayISAPI.dll?ViewItem&item=270538502843 ebay seller]]
|-
| Logitech Premium 4-Port USB Hub
| Works
| http://www.logitech.com/en-in/notebook-products/usb-hubs/devices/3048
|-
| LUPO 7-port USB 2.0 Hub (cheap octopus type which can be powered as there is dc socket)
| Works - kilowatt
| Does not come with a power adapter, hub was tested without a power supply. [http://www.amazon.co.uk/gp/product/B003BVDABG/ref=oss_product from amazon uk seller]]
|}

==More Information==
For more information on the Pandora's two USB ports and the possible connections that can be made with them, see [[USB_reference|the USB reference page]].

[[Category:USB]]
[[Category:List]]

Pandora Bounties

2011-02-27T21:46:04Z

MichaelXX2: The GP2X wiki has this, so we could probably use one.

This is a list of projects on which bounties have been placed by various members of the Pandora community. The wiki is not responsible for these bounties and authors which wish to collect a bounty must contact the person offering the money directly. People should realize that by offering an amount of money for a bounty, they are committing themselves to pay it at any time the bounty is fulfilled (I advise developers to contact those requesting something before starting work to ensure the money is still available) - do not add yourself to a list if you do not intend to pay! It is also requested that those offering a bounty should leave an e-mail address so that they may be contacted.

'''Please keep the list sorted in alphabetical order by title!'''

{| border="1" cellpadding="1" cellspacing="0" style="font-size: 85%; border:1px solid gray; border-collapse: collapse; text-align: center; width: 100%;"
|- style="background: #ececec"
! Title
! Description
! Reward
! Offers
! Complete

|-
| '''Audacity for Pandora'''
| An audio editor.
| $10
|
|

|}

[[Category:Development]]

Power modes

2011-02-06T17:35:00Z

MichaelXX2: /* Power Off */ What, are we furries?

===Power Modes===

Without switching the device entirely off, it may be placed into low power mode or regular power mode; simply pressing the power button will toggle modes. Note that as of hotfix3, opening the lid in low power mode has no effect.

====Normal Mode====
This is the normal operating mode, screen on, WiFi and Bluetooth on if requested. CPU speed can be selected by the user, and has a small impact on battery life. Screen brightness will also have a significant effect on battery life. The CPU should automatically self-regulate to the current task, and 10-14 hours battery life is possible depending on usage. This is mostly independent of the set CPU speed for any given task. At any time, the battery gauge will show the remaining battery life ''if the usage remains the same as over the past some seconds''.

====Lid Closed====
The only change with the lid closed is to turn off the LCD backlight. This improves battery life, allowing music playback and streaming to continue. As of Hotfix2, the screen remains on if the device is powered up with the screen closed. It is also possible to set xfce to blank the screen after a period of inactivity, which helps with battery.

====Low Power====
Low power mode is toggled by a short press of the power switch to the right. The screen is off, the radios are disabled, the CPU max speed is set to 14 MHz. The device is still silently on, allowing for alarms to go off or it to be turned on again instantly. The power LED will be dimmed, and may appear to be off if you are outside.

Low power mode is probably going to be used as the normal "off" for most people, with true off (device powered down entirely, unable to respond to alarms or wake up quickly) available to conserve battery power. Turning the Pandora off completely is the best option if you don't plan on using it for few days or longer.

Since the Pandora has to be powered whilst it is charging, low power mode is best for fastest charging, and will even allow a full charge to be achieved from USB. It is also the best way to use the Pandora as a USB charger for other devices.

Opening the screen whilst in low power mode has no effect (screen stays off, clocks stay low), and you will need to use the power switch to resume.

At the moment, there is no clear advantage in slowing the clocks (other than being an effective pause button when playing MP3). The only saving is through disabling the radios. This is likely to be improved in due course since there are features in the omap processor for power saving which are being added to the linux kernel.

====Power Off====
Select Logout then Shutdown from the window manager to power off. If a charger is connected, the device will re-boot immediately. It is possible to get into a state where you believe it is powered off, but in fact it is using power at the normal screen off rate - so after 12 hours, 50% of your battery is gone. The Power green LED ought to be a tell-tale. It is possible that some bugs exist in this area, but nothing has been clearly identified[http://www.gp32x.com/board/index.php?/topic/54652-solved-pandora-lost-charge-overnight/]

A common problem seems to be that if you switch off ''before'' unplugging, your Pandora will re-boot even though it is now left unplugged. This problem is compounded by the low battery shutdown script being called repeatedly (and actually preventing shutdown).

To do a '''hard-reset''' of the Pandora (in case of software crashes), press and hold the Pandora key and flick the power button to the right.

==Events==
The events which control power can be customised [http://www.gp32x.com/board/index.php?/topic/54544-forcing-shutdown-at-10-battery-life/page__view__findpost__p__878418]. Lid switch, Power Switch, battery threshold and Window Manager shutdown commands. Note that the battery manager in xfce will also take action when the battery is low, by default forcing a shutdown at 5% (so you may observe a full boot process, the window manager appears, then immediately shuts down)

==Charging==
[[image:Power_uk.png|thumb|alt=UK charger and adapter|UK charger and adapter]]
It is possible to charge from the mains charger (use the supplied one or a ''GENUINE'' PSP adaptor only) or USB cable. While a charger is connected, remaining battery level is displayed, but the time displays 00:00. If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 1000mA, USB charge is more like 500mA.

It is not possible to charge the Pandora without turning it on - the charging circuits rely on the CPU for configuration. In practice, this has minimal impact on usage, except that after charging, you might wish to explicitly turn off (and maybe there is a easy way to automate this by adding a charger event to call a script)

==Opperating Point==
The ''OPP'' is a TI term which reflects the fact that low clock speeds can be achieved with lower supply voltage than the higher clock speeds. Increasing OPP will reduce the lifetime of the device significantly (from 10 years to 5 years of continuous use.) OPP3 is the default as shipped by OpenPandora. As of Hotfix4, it is possible to set a maximum OPP in the range 1-5 (for example, to 5):
<pre>echo 5 | sudo tee -a /proc/pandora/cpu_opp_max</pre>
This will then increase OPP to suit the requested CPU max, as pre-determined by a table built in to the kernel. These thresholds use OPP1 for below 125 MHz, and OPP5 for above 720 MHz. It is possible to set the limiter and maybe run at 500 MHz in OPP2 (depending on your specific chip). See [http://boards.openpandora.org/index.php?/topic/22-using-hotfix4-how-high-can-you-clock/ this forum thread] for actual results.

'''''Using anything above OPP3 WILL shorten the lifetime of your Pandora, although it should still outlive the 1 year warranty. Using anything above OPP5 will void your warranty.'''''

Tweaking scripts to make this tuning easier are in the works.
==Monitoring==
The kernel provides some information about battery state through the filesystem. See [[Data_provided_by_Battery_and_Power_driver]]. This may help with diagnosing problems.

==Times==
(These are my estimates, mostly from HotFix3. Please add to the data section in the talk page, and be clear about the conditions you use)
{| border="1"
|+ Charge/Discharge times
! Mode !! Time
|-
! Normal Operating
| 10-14 hours
|-
! MP3 play, screen off
| 17 hours (May improve)
|-
! Lid Closed
|16-23 hours (est, depends on wifi)
|-
! Low Power
|23 hours (maybe 30 with Hotfix4)
|-
! Power off
|about 5% per week charge loss (although there are reports of much faster drain?[http://boards.openpandora.org/index.php?/topic/24-battery-drain/])
|-
! Mains charge, operating
| 20 hours (est)
|-
! Mains charge (low power)
|8 hours (est)
|-
! USB Charge, operating
| 20 hours (inactive, screen+wifi on), may charge or discharge depending on load
|-
! USB Charge, low power
|20 hours (est)
|}

==Battery Care==
* You can charge your battery to full charge, the charging circuits will then reduce the current to avoid overheating
* If you won't use the battery for more than a week, it is best to leave it at about 40% charged (as opposed to full)
* Don't worry about running it down too low, there are protection circuits to avoid a damagingly low discharge.
**Avoid leaving the battery completely discharged though.
**When the power runs out, the system will be unable to shutdown cleanly, and might corrupt your files or the system.
* No harm will come if you only partially recharge it. If you've only got 10 free minutes to charge before leaving, go ahead. You'll put an hour of usage back into the battery, and you can always charge it more later.
* For best accuracy, the battery meter relies on watching the battery discharge over most of it's range (down to say 10%).
**This will only affect the 'time to run' indication
* If you're not going to be using your battery for a very long time, the extremely best thing you can do for it is to discharge to 40%, seal it in an airtight bag, and put it in the fridge. Even years later, you pull it out, and it will be almost as good as when you put it in.

[[Category:Hardware]]

Power modes

2011-01-31T21:53:12Z

MichaelXX2: /* Battery Care */ e

===Power Modes===

Without switching the device entirely off, it may be placed into low power mode or regular power mode; simply pressing the power button will toggle modes. Note that as of hotfix3, opening the lid in low power mode has no effect.

====Normal Mode====
This is the normal operating mode, screen on, WiFi and Bluetooth on if requested. CPU speed can be selected by the user, and has a small impact on battery life. Screen brightness will also have a significant effect on battery life. The CPU should automatically self-regulate to the current task, and 10-14 hours battery life is possible depending on usage. This is mostly independent of the set CPU speed for any given task. At any time, the battery gauge will show the remaining battery life ''if the usage remains the same as over the past some seconds''.

====Lid Closed====
The only change with the lid closed is to turn off the LCD backlight. This improves battery life, allowing music playback and streaming to continue. As of Hotfix2, the screen remains on if the device is powered up with the screen closed. It is also possible to set xfce to blank the screen after a period of inactivity, which helps with battery.

====Low Power====
Low power mode is toggled by a short press of the power switch to the right. The screen is off, the radios are disabled, the CPU max speed is set to 14 MHz. The device is still silently on, allowing for alarms to go off or it to be turned on again instantly. The power LED will be dimmed, and may appear to be off if you are outside.

Low power mode is probably going to be used as the normal "off" for most people, with true off (device powered down entirely, unable to respond to alarms or wake up quickly) available to conserve battery power. Turning the Pandora off completely is the best option if you don't plan on using it for few days or longer.

Since the Pandora has to be powered whilst it is charging, low power mode is best for fastest charging, and will even allow a full charge to be achieved from USB. It is also the best way to use the Pandora as a USB charger for other devices.

Opening the screen whilst in low power mode has no effect (screen stays off, clocks stay low), and you will need to use the power switch to resume.

At the moment, there is no clear advantage in slowing the clocks (other than being an effective pause button when playing MP3). The only saving is through disabling the radios. This is likely to be improved in due course since there are features in the omap processor for power saving which are being added to the linux kernel.

====Power Off====
Select Logout then Shutdown from the window manager to power off. If a charger is connected, the device will re-boot immediately. It is possible to get into a state where you believe it is powered off, but in fact it is using power at the normal screen off rate - so after 12 hours, 50% of your battery is gone. The Power green LED ought to be a tell-tail. It is possible that some bugs exist in this area, but nothing has been clearly identified[http://www.gp32x.com/board/index.php?/topic/54652-solved-pandora-lost-charge-overnight/]

A common problem seems to be that if you switch off ''before'' unplugging, your Pandora will re-boot even though it is now left unplugged. This problem is compounded by the low battery shutdown script being called repeatedly (and actually preventing shutdown).

To do a '''hard-reset''' of the Pandora (in case of software crashes), press and hold the Pandora key and flick the power button to the right.

==Events==
The events which control power can be customised [http://www.gp32x.com/board/index.php?/topic/54544-forcing-shutdown-at-10-battery-life/page__view__findpost__p__878418]. Lid switch, Power Switch, battery threshold and Window Manager shutdown commands. Note that the battery manager in xfce will also take action when the battery is low, by default forcing a shutdown at 5% (so you may observe a full boot process, the window manager appears, then immediately shuts down)

==Charging==
[[image:Power_uk.png|thumb|alt=UK charger and adapter|UK charger and adapter]]
It is possible to charge from the mains charger (use the supplied one or a ''GENUINE'' PSP adaptor only) or USB cable. While a charger is connected, remaining battery level is displayed, but the time displays 00:00. If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 1000mA, USB charge is more like 500mA.

It is not possible to charge the Pandora without turning it on - the charging circuits rely on the CPU for configuration. In practice, this has minimal impact on usage, except that after charging, you might wish to explicitly turn off (and maybe there is a easy way to automate this by adding a charger event to call a script)

==Opperating Point==
The ''OPP'' is a TI term which reflects the fact that low clock speeds can be achieved with lower supply voltage than the higher clock speeds. Increasing OPP will reduce the lifetime of the device significantly (from 10 years to 5 years of continuous use.) OPP3 is the default as shipped by OpenPandora. As of Hotfix4, it is possible to set a maximum OPP in the range 1-5 (for example, to 5):
<pre>echo 5 | sudo tee -a /proc/pandora/cpu_opp_max</pre>
This will then increase OPP to suit the requested CPU max, as pre-determined by a table built in to the kernel. These thresholds use OPP1 for below 125 MHz, and OPP5 for above 720 MHz. It is possible to set the limiter and maybe run at 500 MHz in OPP2 (depending on your specific chip). See [http://boards.openpandora.org/index.php?/topic/22-using-hotfix4-how-high-can-you-clock/ this forum thread] for actual results.

'''''Using anything above OPP3 WILL shorten the lifetime of your Pandora, although it should still outlive the 1 year warranty. Using anything above OPP5 will void your warranty.'''''

Tweaking scripts to make this tuning easier are in the works.
==Monitoring==
The kernel provides some information about battery state through the filesystem. See [[Data_provided_by_Battery_and_Power_driver]]. This may help with diagnosing problems.

==Times==
(These are my estimates, mostly from HotFix3. Please add to the data section in the talk page, and be clear about the conditions you use)
{| border="1"
|+ Charge/Discharge times
! Mode !! Time
|-
! Normal Operating
| 10-14 hours
|-
! MP3 play, screen off
| 17 hours (May improve)
|-
! Lid Closed
|16-23 hours (est, depends on wifi)
|-
! Low Power
|23 hours (maybe 30 with Hotfix4)
|-
! Power off
|about 5% per week charge loss (although there are reports of much faster drain?[http://boards.openpandora.org/index.php?/topic/24-battery-drain/])
|-
! Mains charge, operating
| 20 hours (est)
|-
! Mains charge (low power)
|8 hours (est)
|-
! USB Charge, operating
| 20 hours (inactive, screen+wifi on), may charge or discharge depending on load
|-
! USB Charge, low power
|20 hours (est)
|}

==Battery Care==
* You can charge your battery to full charge, the charging circuits will then reduce the current to avoid overheating
* If you won't use the battery for more than a week, it is best to leave it at about 40% charged (as opposed to full)
* Don't worry about running it down too low, there are protection circuits to avoid a damagingly low discharge.
**Avoid leaving the battery completely discharged though.
**When the power runs out, the system will be unable to shutdown cleanly, and might corrupt your files or the system.
* No harm will come if you only partially recharge it. If you've only got 10 free minutes to charge before leaving, go ahead. You'll put an hour of usage back into the battery, and you can always charge it more later.
* For best accuracy, the battery meter relies on watching the battery discharge over most of it's range (down to say 10%).
**This will only affect the 'time to run' indication
* If you're not going to be using your battery for a very long time, the extremely best thing you can do for it is to discharge to 40%, seal it in an airtight bag, and put it in the fridge. Even years later, you pull it out, and it will be almost as good as when you put it in.

[[Category:Hardware]]

USB reference

2011-01-29T16:25:56Z

MichaelXX2: /* OTG host mode */ Minor fixes, and that alt= crap in the box is completely unnecessary

==Readme First!==

If you have a question to ask, that isn't covered in this FAQ already, please ask over on the [http://www.gp32x.com/board/index.php?showforum=61 Forums].

==USB FAQ==

===How many USB ports does Pandora have?===
Pandora has two USB ports:
* 1x USB 2.0 host port (USB standard-A receptacle)
* 1x USB 1.1/2.0 OTG port (USB mini-AB receptacle)

===What does “host port” mean?===
A USB host port “hosts” any device that you plug in, just like the USB ports on your computer. Pandora’s full size USB A port can host USB 2.0 devices (only if they are '''high speed compliant'''!), and provide up to 500mA (the maximum allowed according to USB standards).

===What does “OTG” mean?===
OTG stands for On The Go. USB OTG ports can operate in two different modes. When connected through this port, the Pandora can act as a device, for example when connected to a computer for charging & data transfer. For this mode, you need a standard-A to mini-B cable. However, the Pandora can also act as a host port for USB 1.1 and USB 2.0 devices. For details on how to make the necessary cable connection, see [[USB_reference#OTG_host_mode|the OTG host mode section]]. This port can supply a maximum of 100mA in host mode. Although this port implements On The Go functionality, it can not get an official On The Go certification because the OTG specification requires a device to have exactly one USB port. (The Pandora has two.) Also, the mini-AB connector used on the Pandora has been taken out of the specification in 2007 (but is still widely adopted).

===What’s all this stuff about USB 1.1 and USB 2.0? Isn’t USB, uh, universal?===
USB 1.1 is a subset of the USB 2.0 protocol. Among many other things, the USB 2.0 standard introduced high-speed data transmission, which requires a special controller on the host side. Most USB ports (eg. on your computer’s motherboard, in USB hubs) actually contain '''two chips''' to allow universal compatibility – one that takes care of the Low-Speed (1.0 Mbit/s) and Full-Speed (12 Mbit/s) devices, and another one for the Hi-Speed (480 Mbit/s) devices. The reason is that Low-Speed and Full-Speed are essentially the same protocols operated at different clock frequencies. Hi-Speed is a completely new development and nothing like the other two.

For reasons beyond our control, Pandora’s USB standard-A host port does not contain this second chip. Only USB 2.0 devices bearing the “USB HI-SPEED” logo can be plugged directly into this port. However, USB 1.1 devices can be connected to this port through a USB hub, provided the hub bears the “USB HI-SPEED” logo.

Pandora’s USB OTG (mini-AB) port is fully compatible with both USB 1.1 and USB 2.0, allowing it to host either type of device.

===So which devices are which?===
[[Image:USB-HighSpeed-certified-Logo.png|thumb|alt=USB High Speed Certified logo|Devices bearing this logo are certified High Speed devices. They can be plugged directly into Pandora's USB 2.0 host port.]]
There are no set rules. As a very general guide:
* Common Low-Speed and Full-Speed devices include keyboards, mice, headsets, older USB devices.
* Common Hi-Speed devices include cameras, PMPs, HDDs, hubs, card readers, thumb drives.
This is just a rough representation of what’s out there in the wild, and you will find exceptions. Devices like HSDPA modems and GPS units could fall into either category. The only reliable indication of true Hi-Speed compatibility is the “USB Hi-Speed Certified” logo (right).

===Arrgh, USB used to be simple. What can I actually connect to Pandora?===
Almost anything, as long as it's supported by Linux. Think of a USB device that everybody uses (mouse, keyboard, thumb drive...) and chances are it will be a simple matter of plug and play. But this might not be the case for more specialised USB devices (modems, ethernet adapters, USB displays...), many of which will only function with Windows specific drivers.

If you intend to purchase USB accessories for use with Pandora, you should first research Linux support for that type of device. Devices already tested on Pandora will be added to the [[USB compatibility list]].

The various USB connection scenarios are as follows:

==Pandora as USB slave==
[[Image:Pandora.usb.slave.png|thumb|alt=Pandora as USB slave|Pandora as USB slave]]
Using a USB standard-A to mini-B cable (the kind you probably own several of), you can:
* Transfer data to/from Pandora
* Charge Pandora's battery.

'''Note:'''
* Charging Pandora from your computer's USB port is best done with Pandora in standby mode. The current provided by your computer will probably not be sufficient to provide a quick charge while Pandora is being used.
* There are USB standard-A to mini-B cables that can be used to charge your Pandora but don't work to transfer data to/ from the Pandora! MSWindows will complain abount "An unknown device connected". Try using a different cable.

==Hosting USB devices==
[[Image:Pandora.usb.host.png|thumb|alt=Pandora as a USB host|Pandora as a USB host]]
*Directly plug in a Hi-Speed USB 2.0 device such as a thumb drive, or a Huawei E160 modem.
*Using a USB standard-A to USB standard-B (or mini-B, micro-B, depending on what's on the device) cable, connect Hi-Speed USB 2.0 devices such as cameras, PMPs, and HDDS.
*Connect a USB hub, which will enable you to to connect other non-Hi-Speed USB devices such as keyboards, mice, or a Huawei E220 modem.

'''Note:'''
*This port can supply a maximum of 500mA. If you plan to use a USB HDD, note that very few of these can draw sufficient power from a single USB port. A powered HDD caddy or powered USB hub will be necessary in most cases.

==OTG host mode==
[[Image:Pandora.usb.otg.host.png|thumb|alt=Pandora in OTG host mode|Pandora in OTG host mode]]
How you connect a device to the mini-AB OTG port depends on the device's USB connector.
*standard-B receptacle: Use a mini-A to standard-B cable.
*mini-B receptacle: Use a mini-A to mini-B cable.
*micro-B receptacle: Use a mini-A plug to standard-A receptacle adapter and a standard-A to micro-B cable.
*standard-A plug: Use a mini-A plug to standard-A receptacle adapter.
*mini-A plug: No extra cable or adapter needed.
*micro-A plug: No standardized solution exists.

This port allows you to connect any USB 2.0-compliant device (Hi-Speed, Full-Speed, Low-Speed, including USB 1.1 ones) directly, without the use of a hub.

'''Notes:'''
*mini-A and mini-AB connectors have been removed from the present USB standard. This means that the above connectors may vanish from the market at some point (although there will probably be demand for them for some time). There are a lot of connectors available that were never standardized. It is recommended that you do not use them as they may lead to non-working connections. Stick to the cables and adapters mentioned above and look for a mention of "OTG" or "On The Go" and you should be on the safe side.
*In host mode, this port can supply a maximum of 100mA. USB 1.1 devices that draw more than 100mA will need to connect to Pandora's other USB port via a hub, as depicted in the previous example. The Huawei E220 is one such device.
*If you have trouble connecting any device to the small OTG port, check if 'Setting->Startup->Enable/Disable services on boot->Start USB Network on bootup' is checked! This needs to be set in order to work. Default setting is unchecked (Better naming of this option is planned for Hotfix5, see [http://www.gp32x.com/board/index.php?/topic/56516-wishlist-for-hf5/]).

'''Host mode connector'''
[[Image:Mini-usb.png|thumb|Mini-B and Mini-A comparison]]
Shown here are a Mini-B connector (left, black) and a Mini-A connector (right, white). The mini-a connector should be the one you want in order to use the OTG port in host mode. Click on the image for a larger version.

With the right connector, it is not necessary to switch the mode of the port[http://www.gp32x.com/board/index.php?/topic/55396-how-do-you-put-the-usb-otg-port-into-host-mode/], it will be done automatically. It may also be possible to force a mode switch, but this has not been clarified by the devs, and could result in two devices both attempting to power the port (which is not recommended)

==Links==
*[[USB_compatibility_list|Pandora USB compatibility list]]
*[http://www.usb.org/developers/docs/usb_20_122208.zip USB 2.0 Standard (including present OTG spec)]
*[http://www.usb.org/developers/onthego/otg1_0.pdf Original OTG Specification defining mini-A and mini-AB and allowed connections]
*[http://www.usb.org/developers/Deprecation_Announcement_052507.pdf mini-A and mini-AB Deprecation Announcement]
*[http://en.wikipedia.org/wiki/USB Wikipedia page on USB]

[[Category:FAQ]]