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32
votes
7answers
119k views

Can I install Git on Raspbian?

Can I get Git on Raspbian to back-up my C/C++ files? Do I need to download anything to use Git on my Raspberry Pi? Where can I learn to use it?
32
votes
5answers
59k views

How do I measure the current power consumption?

Is it possible to measure (with software, like PowerTOP) the Pi's current power consumption, on my Raspberry Pi?
32
votes
3answers
153k views

How to get PulseAudio running?

I would like to use my Raspberry Pi as an PulseAudio sink that can play audio via the network. For starters I want to get Pulseaudio running locally and have run into various errors. I am using the ...
32
votes
3answers
6k views

Hooking up a Kinect?

There is a driver project established to run Kinect on Linux. See here: https://github.com/OpenKinect/libfreenect Will this work with an RPi? What are the constraints/obstacles likely to be? I'm ...
31
votes
14answers
83k views

More powerful alternative to Raspberry Pi?

I already own a Raspberry Pi model B, and I am looking for a more powerful alternative. I want it to be able to run as a server (email, file, and web) and also as a media center. I know Raspberry Pi ...
31
votes
2answers
36k views

What BIOS does Raspberry Pi use?

I am wanting to learn about the BIOS on a Raspberry Pi motherboard. What is the BIOS called? Does it have a specific name or is it just called a BIOS on a Raspberry Pi?
31
votes
9answers
3k views

Libraries for interfacing with the GPIO

What libraries are available for interfacing with the GPIO?
31
votes
5answers
63k views

How do I display images without starting X11?

I can view videos using OMXPlayer: omxplayer -o hdmi video.h264 How do I do the same for still images?
31
votes
4answers
68k views

How do I install new software?

I am aware that Linux distributions usually have 'package managers' to allow me to download and install software from the command line, and that I should also be able to download and compile source ...
31
votes
3answers
37k views

What speed can I expect from the hardware-H264-encoding?

I stumbled over the Wikipedia-article that the Broadcom GPU has hardware support for encoding H.264/AVC, not only de-coding. I also found an article where someone gave an example using ffmpeg to ...
31
votes
5answers
161k views

How can I connect my Pi directly to my PC and share the internet connection?

What I want to do is to connect through SSH and HTTP to my Raspberry Pi without having to connect it to the router. I use the Adafruit's Web IDE to create and run my programs, and I'd like to access ...
30
votes
6answers
30k views

What is a typical boot time for the standard Debian distribution on a typical SD card?

How long does the RasPi take to boot when using the standard Debian distribution on a typical SD card? Are we talking less than a second? A couple of seconds? 10 seconds? 100 seconds? This isn't too ...
30
votes
8answers
11k views

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 ...
30
votes
6answers
193k views

Kernel panic-not syncing: VFS: unable to mount root fs on unknown- block(179,6) running Raspbian on top of NOOBS

When booting, the sequence stops at the following: Kernel panic-not syncing: VFS: unable to mount root fs on unknown-block(179,6) What can I do to get my Raspberry Pi 2 to boot again using the ...
30
votes
7answers
103k views

Will any external battery power a Raspberry Pi?

I am working on a project that needs the Raspberry Pi to work without a mains connection. I have considered buying a 50000mAh USB power bank. Would this power a Raspberry Pi, and if so, would it ...
30
votes
1answer
18k views

What are the maximum operating temperatures of the components?

What are the main sources of heat on the board? What temperatures do these components reach under load?
30
votes
4answers
34k views

How can I use I2C to talk to sensors?

How can I talk to digital sensors over the I²C interface? Hardware: Which pins on the Raspberry Pi's GPIO can I use? Software: What I²C libraries are available?
30
votes
3answers
9k views

Can I use OpenCV?

While the Raspberry Pi is not exactly a powerhouse, it should be capable of doing some OpenCV image or video processing. Has anyone tried to install it?
30
votes
3answers
15k views

Can Raspberry Pi reliably bit bang a 9600 baud serial and is there example code?

I am wondering how feasible it is to use bitbanging to drive a 9600 baud serial via the GPIO pins on the Raspberry Pi. Obviously, Linux is not a terribly good platform for bitbanging, as there is a ...
30
votes
2answers
65k views

How to get Wi-Fi to connect on boot?

Raspberry Pi Model B OS: Raspbian I am running my Pi headless (currently through a direct Ethernet connection). I have a USB WiFi dongle. I would like to have the WiFi start up at boot and connect ...
30
votes
2answers
43k views

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 ...
29
votes
9answers
128k views

Getting NPM installed on Raspberry Pi (Wheezy Image)

I was lucky enough to get a Raspberry Pi under the tree this year and I've had a bit of fun playing with Node.js on the device. However, Node.js is much more interesting when you can pull down ...
29
votes
6answers
25k views

Shutting down the Pi safely without SSH or a monitor?

My Pi is currently not responding to SSH, and the only HDMI monitor I have is a large TV several meters away. I've heard bad things about unplugging it, but do I have any other option? Currently ...
29
votes
3answers
36k views

Where is the archive.key for backports.debian.org?

I'm trying to follow the instructions here in order to install puredata on my Pi. I'm getting the following error: W: GPG error: http://backports.debian.org squeeze-backports Release: The following ...
29
votes
5answers
26k views

How do I create a new user?

Are there any security implications for creating (or not creating) a new user? If need be, how do I create a new user or change the default user?
29
votes
2answers
35k views

SAP error on bluetooth service status

I am getting an error on bluetooth service status. I need guidance to resolve this error. pi@raspberrypi:~ $ sudo service bluetooth status * bluetooth.service - Bluetooth service Loaded: ...
29
votes
1answer
10k views

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?
29
votes
2answers
56k views

WiFi configuration on Arch Linux ARM

I have bought a Model A Pi, and I successfully configured it with a USB Wifi dongle on Raspbian. I recently prepared an SD card with the latest version of Arch Linux ARM and I am trying to get it set ...
29
votes
10answers
134k views

Running a Python script at startup

This question has been asked quite a few times before but I didn't seem to get it working using the existing information. My Pi runs Raspbian. I have a Python script named dnscheck.py which loops ...
29
votes
5answers
58k views

Why do the Pi GPIO pins use/give 3.3V and not 5V?

I know for a long time that people should NOT put more than 3.3V on the GPIO pins. They also give out 3.3V when high. I did some research and it seems no one really bothered asking. Almost all of ...
29
votes
3answers
60k views

What size screws does the Raspberry Pi board use?

On the model B+ there are four screws that can be used to attach your device either to a base or firmly inside of a case or other enclosure. What is the size of these screws? That is, if you are ...
29
votes
4answers
15k views

Is it possible to update, upgrade and install software before flashing an image?

It seems silly to use our limited SD write cycles to upgrade the software shipped on the images. Can we upgrade the software and install new software before flashing an image to the SD card?
29
votes
3answers
8k views

How can I use the GPIO pins as digital outputs?

I've read that the Raspberry Pi has a number of input and output pins. How can I switch them? (from Python?) What voltage logic? Do I need pull-up or pull-down resistors? Do I need to switch the pins ...
29
votes
1answer
40k views

How do I update OpenSSL on Raspbian

It seems like Raspbian has not been updated yet to deal with the Heartbleed bug. sudo apt-get update then sudo apt-get upgrade doesn't update anything (this is a system which was freshly updated ...
29
votes
2answers
65k views

Wifi - bring wlan0 up on boot

I have my network setting stored in /etc/wpa_supplicant.conf and my /etc/network/interfaces looks like this: auto lo, eth0, wlan0 iface lo inet loopback iface eth0 inet dhcp iface wlan0 inet dhcp wpa-...
29
votes
3answers
129k views

Raspberry Pi 3 audio input?

Did Raspberry Pi 3 add audio input? I'm new to RPi and interested in doing speech recognition but noticed input has been missing for previous versions. If it hasn't, what is the best way for me to go ...
29
votes
5answers
31k views

Circuit to safely power-down Pi

I want to use my Pi as an XBMC server in the car. The XBMC docs say that you should always use the shutdown command before disconnecting the power. I've been thinking that it should be possible to ...
29
votes
2answers
21k views

How does memory-mapped I/O addressing work?

How does memory-mapped I/O addressing work? I'm trying to understand a sample supplied I2S: Anyone got it running?. Configuring Clocks: #define BCM2708_PERI_BASE 0x20000000 #define ...
29
votes
1answer
7k views

What happens during the boot process?

What happens during the boot process after the Raspberry PI is turned on? I know that it differs from the standard Linux boot process ( no complex boot manager like Lilo/Grub ), I also know that the ...
29
votes
4answers
9k views

Is there anything I can do to improve boot speed?

I love my Pi, but it takes a considerable time to boot. If I want to use it as a Media Centre, it's quite important that it powers up quickly. Are there any steps I can take to improve boot ...
28
votes
13answers
64k views

Raspberry Pi 3 - eth0 wrongfully named 'enx…'

My new RPi 3 device (yay) recently booted up with a deactivated ethernet. So i watched /etc/networks/interfaces and saw the line: auto eth0 iface eth0 inet dhcp Calling ifup eth0 unfortunately gave ...
28
votes
7answers
34k views

Why does the Raspberry Pi not have a power button?

If you buy a computer you expect it to come with a power button. So why does the Raspberry Pi not have one? Is it because it would take up too much room or be awkward to fit on the PCB? Personally ...
28
votes
4answers
157k views

How to login as root remotely?

I am trying to login to the raspberrypi as root user via winscp, but it only says "Access denied", same thing for trying to login directly as root on ssh. I have tried loging in as pi and doing sudo ...
28
votes
3answers
66k views

Remove boot messages (all text) in Jessie

I have a custom python app that I wanted to have started automatically on the RPi with the official touch screen. This used to work fine without a sleuth of boot messages appearing until the latest ...
28
votes
3answers
77k views

Simple Keyboard Configuration

My USB keyboard was configured slightly wrong. So far I have only tried it with the Debian image. Certain keys were not in the right place (such as the '~' character). I know how to change the ...
28
votes
2answers
107k views

Open chromium full screen on start up

I would like to set up a couple of Raspberry Pis to open automatically chromium or any other browser available to at start-up, and in full screen mode. I was wondering if any of you can help me. ...
28
votes
8answers
41k views

I failed to remote connect to Raspberry Pi 3 from Ubuntu

I just bought raspberry pi 3 with Rapbian Jessi with Pixel and I have a Lenovo laptop with Ubuntu 14.04 64 bit on it. I want to remote connect to it from my laptop. I enabled the VNC server on ...
28
votes
9answers
48k views

Copy existing Raspbian installation to smaller SD card

Is it possible to copy an existing and configured Raspbian installation to a smaller SD card? When I first installed Raspbian I only had a 32 GB card at hand which obviously is bigger than needed.
28
votes
5answers
2k views

Powering from a non-dedicated power source

While the quick start guide says not to power the device from a USB hub or from a computer, the only requirements for power listed are: Micro USB power supply – make sure you use a good quality one,...
28
votes
2answers
4k views

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.

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