Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
18
votes
2 answers

Safe to power a raspberry pi from a 50W adapter

I have a power adapter that is rated at 50W (5V, 10A output), and I was wondering if it would be safe to run a single pi from it? I am planning on using it for powering more in the future, but would it require 10 be connected (in parallel) to…
topherg
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2 answers

Connect to Raspberry PI 3 over Wi-Fi direct

I want to connect from an android phone to a RPI 3 over Wi-Fi direct. I want to do it over Wi-Fi direct because the RPI will be a controller for one or more movable devices that will be used in buildings as well as out in the nature. In buildings,…
Van Coding
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Editing Serial Number

On the official raspberrypi.org forum, "Dom" - a moderator wrote: I've fudged my board to have your serial number How do I edit the serial number of a Raspberry Pi?
Another Simon
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4 answers

How to know the input voltage on Raspbian?

I have a unattended raspberry with a power supply for many device. Raspberry has lately restarts and I think that may be caused by a under voltage. Is it possible to check the input voltage for software? I've seen some projects but used hardware and…
crossmax
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18
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3 answers

Why are Raspberry Pi's vi key bindings so quirky?

Have you ever noticed that the default vi key bindings on the Raspberry Pi are a little wacky? For example, while in insert mode, try using the arrow keys to navigate. Not happening :) Is this a subtle way of getting us to use insert and command…
Brad Hein
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18
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4 answers

How can I boot directly into Google Chrome Web browser?

I want to make my Raspberry Pi to boot directly to an instance of the Google Chrome web browser. What's the best distribution to use for this and method of putting it together? Is there a way to open Chrome as a full screen app as soon the system is…
Tiagozap
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2 answers

How do I upgrade Raspbian?

I have my Raspberry Pi setup how I want, but I have an older version than what is currently available (2012-10-28-wheezy-raspbian.zip). How do I upgrade the kernel, firmware, etc.? I have upgraded some using: $ sudo apt-get update $ sudo apt-get…
kevin
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18
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8 answers

Raspbian without a GUI and other programs I don't need

I like Raspbian for simplicity. It runs, but still I don't like the following: It comes with a GUI -- I want to install my own window manager (if I want) It comes with programs like Mathematica, Wolfram, Sonic Pi, etc. I don't want these,…
Ionică Bizău
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18
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2 answers

How does speed of QEMU emulation compare to a real Raspberry Pi board?

I've managed to following Jivings answer to set up QEMU on my Ubuntu machine with the default Debian image, though I have had to use arm1136-r2 instead of arm1176. What is the best way to compare the speed the emulated processor is running at? Doing…
Alex Chamberlain
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18
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5 answers

i2cdetect shows every possible address

I was trying to turn on I2C following this tutorial http://www.raspberrypi-spy.co.uk/2014/11/enabling-the-i2c-interface-on-the-raspberry-pi/ But I have problem which I cannot solve. The command i2cdetect -y 1 returns 0 1 2 3 4 5 6 7 8 …
wja
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18
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9 answers

Screen Flashing

The screen flashes/blanks randomly, when It flashes, It goes blank and stays in blank for like 2 seconds and screen comes back again. But again after having 1 second of screen, it goes blank again. Sometimes it might take up to 10 minutes for it to…
111WARLOCK111
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18
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1 answer

How to auto start chromium after boot on the Raspberry 2 (2015-01-31 debian wheezy)?

I tried this tutorial on the latest debian wheezy (2015-01-31) http://www.lukebrowning.com/hardware/raspberry-pi/touch-screen-chromium-kiosk-on-the-raspberry-pi/ but its not working anymore... (If I made the same thing on an older debian wheezy…
szuniverse
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18
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2 answers

record and stream video from camera simultaneously

I am recording video from Pi using Camera Module with picamera: import picamera with picamera.PiCamera() as camera: camera.resolution = (640, 480) camera.start_recording('1.h264') camera.wait_recording(5) for i in range(2, 11): …
koogee
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18
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2 answers

Take images in a short time using the Raspberry Pi camera module

I'm working on a project in which I need to take about 30 images per second (no movie) using the Raspberry Pi camera module. I'm using the Picamera library (http://picamera.readthedocs.org/en/latest/api.html) for that but the problem is, that taking…
Timo Denk
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18
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3 answers

How do I cross-compile the kernel on a Ubuntu host?

I would like to understand more about how the kernel works. Part of this is to compile it myself. How do I cross-compile the Kernel on a Ubuntu host?
Alex Chamberlain
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