Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [usb]

Questions relating to the Raspberry Pi USB ports and specific Raspberry Pi USB devices and device interaction.

The Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication and power supply between computers and electronic devices.

The Rasperry Pi uses USB 2.0, hi-speed, full-speed and low-speed. It can interoperate with SuperSpeed USB 3.0, but will only reach hi-speed with such devices (in USB 2.0 compatibility mode).

For questions concerning power output, see first:

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How much power can be provided through USB?

I know that my USB powered Hard Drive doesn't work, but what is the minimum power requirement that the Raspberry Pi can fulfil for devices that connect via USB?
Jivings
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How can the Raspberry Pi emulate a USB storage device?

USB storage devices, such as USB sticks and harddrives, are common to attach external storage to any kind of computer. How can the Raspberry Pi emulate an USB storage? The easiest application was to directly access the SD card via USB, but one…
Jakob
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Using the Raspberry Pi as a router?

Has anyone used their Raspberry Pi as a routing device? Mainly I want to use it to monitor my network, and it would be great if it had an input and output for Ethernet, but it doesn't, so I am wondering if it is very effective to monitor the network…
clifgray
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Can I use Raspberry Pi as a USB peripheral device?

Raspberry Pi has a Micro USB port for power supply. My question is if this port is only for power purposes or can it be used for data as well? I would like to be able to attach my Raspberry Pi as a USB peripheral to another computer. Is this…
user13
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Boot from USB hard disk?

Is there a way to boot from an external hard drive connected to the device through the USB port (as opposed to booting from the SD card)?
System Down
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Is setting `max_usb_current=1` to give more power to USB devices a bad idea?

I've been searching around for more information on the /boot/config.txt configuration directive max_usb_current, trying to find out exactly what happens when that is set to 1, but it's hard to find any official documentation. I know the…
geerlingguy
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SSH to RPi without a network connection?

Is it possible to SSH in to an RPi without a network connection? I could imagine that you could do it using a LAN cable from the computer to the RPi or maybe using a USB cable. I do actually have access to a network, however it doesn't allow…
Tyilo
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USB card as my default Audio Device

I purchased a small USB sound card. My Pi recognizes the device: $ lsusb Bus 001 Device 004: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller If I run alsamixer and set the audio to USB PnP Sound Device, I can hear audio through the…
PhillyNJ
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Disable LAN9512

The LAN9512 is the hardware device which controls Ethernet and USB ports. This chip consumes almost 200mA, and it will be very useful to disable it to save energy when I don't need USB or Ethernet. The LAN9512 datasheet explains some states of the…
aleixrocks
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Building Wireless Drivers for Edimax Wireless USB: EW-7811UN

I've been trying on and off for days to build the module for my USB wireless device. It is an Edimax EW-7811UN I've found several resources on building modules for Debian, but none for Arch. Currently I am attempting to cross-compile using the…
Jivings
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USB Cables... Why are some of them bad for Raspberry Pi?

Yesterday I bought another Raspberry Pi, and installed Rasplex on it. While using Rasplex, I got this colored square on the top-right corner, indicating that the power supplied to my Raspberry Pi is not sufficient, although I was using an Anker…
The Quantum Physicist
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How to program a USB device with Debian/Python

The Pi is being promoted as an educational device primarily for Python. Inline with this, there have already been some great examples online of people accessing the GPIO from Python. However, most off-the-shelf (rather than home brew) peripherals…
winwaed
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Does the Pi 4 resolve the Ethernet+USB bottleneck issue of past versions?

The Pi 3 (and previous models) had an issue of bottlenecked bandwidth when using Ethernet and USB simultaneously. Is this resolved in the Pi 4?
Wolf
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Can I use a USB webcam?

Is it possible to use a standard USB webcam with the RPi, or is there a specific peripheral that should be used? I would like to use RPi's to stream images from webcams to the net.
darryn.ten
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Power RPi from same Powered USB hub as its Peripherals?

I am putting together all the bits I need to start playing with my Pi, and one question I have is how to power it using the least cables as possible. Given that I have ordered a small mains powered USB hub to attach all the kb/m/wireless etc to, it…
stuffe
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