Questions tagged [raspberry-pi2]
RPI QUESTIONS MUST BE PROGRAMMING RELATED. The Raspberry Pi 2 is a quad-core, ARMv7 instruction set CPU with 1GB of RAM. See the related StackExchange site at https://raspberrypi.stackexchange.com. Also see the first edition's tag at https://stackoverflow.com/questions/tagged/raspberry-pi .
raspberry-pi2
1,235
questions
70
votes
5
answers
50k
views
Docker Access to Raspberry Pi GPIO Pins
When running Docker on the Raspberry Pi 2, how can we expose the GPIO pins to the Docker container?
38
votes
1
answer
3k
views
GStreamer encountered a general stream error in Qt5 raspberry pi
I'm trying to play a video using QtMediaPlayer in Raspberry pi 2 B. The source code is as follows:
QMediaPlayer *media;
QVideoWidget *video;
...
...
media = new QMediaPlayer(parent);
video = new ...
30
votes
3
answers
9k
views
How can I compile Rust code to run on a Raspberry Pi 2?
I recently acquired a Raspberry PI 2 and I want to run a Rust program on it.
Is there a guide/instructions how to cross compile Rust programs on Raspberry PI 2? I've heard about running Rust on RPi ...
23
votes
2
answers
22k
views
VideoCapture.open(0) won't recognize pi cam
I have been working with my Raspberry Pi 2B for a while now. Testing the Pi cam using raspistill works great but trying to use OpenCV functions such as VideoCapture.open(); won't work. trying the same ...
23
votes
16
answers
310k
views
OpenCV NoneType object has no attribute shape
Hello I'm working on Raspberry Pi with OpenCV. I want to try a tutorial which is ball tracking in link
http://www.pyimagesearch.com/2015/09/14/ball-tracking-with-opencv/
But when I compile it, i get ...
23
votes
1
answer
19k
views
How to install Pip on compiled from source Python
I'm on a raspberry pi running the latest Debian. It comes with 2.7.3 by default but I bought it to run a large Flask home automation app which was all written on 2.7.9 and I want no problems later on (...
23
votes
5
answers
24k
views
Access GPIO (/sys/class/gpio) as non-root
The /sys/class/gpio can only be accessed as root by default. So I like that a new group gpio can use the files and directories under /sys/class/gpio. To achieve that I added the following lines to /...
21
votes
2
answers
4k
views
(Cross-)Compiling Swift for Raspberry PI
Swift is now Open Source. Did anyone tried compiling Swift for a Raspberry PI? I started to do, but my 8 GB SD card seems to be too small for it ;) Is it possible to cross compile it from Ubuntu?
19
votes
5
answers
808
views
Database replication on Raspberry Pi mesh network
Does anyone have a good suggestion as to what database I should use, to achieve replication across a variable number of targets?
I have a mesh network of Raspberry Pi servers, each of which can ...
18
votes
3
answers
31k
views
How to emulate the Raspberry Pi 2 on QEMU?
Some time ago I emulated the Raspberry Pi following this article, but this approach has several problems:
It is very slow.
The display solution is limited to 800x600.
You cannot emulate more than ...
18
votes
1
answer
4k
views
How to access Network Share from Raspberry Pi running IoT Core in UWP app
I have a c# UWP app that I'm intending to run on a Raspberry PI with Windows 10 IoT Core. The problem I have is when I try to connect to a UNC share to copy some files.
The network is just a home ...
16
votes
6
answers
28k
views
Installing node.js on raspberry pi 2
I have installed Raspbian on my Raspberry Pi 2 and now I am trying to install node.js on it, however I am hitting an issue.
I followed the instructions and typed these commands into the terminal
...
16
votes
0
answers
8k
views
Will the Raspberry Pi 2, running windows 10, be able to run the .NET Framework? [closed]
As a .NET dev, the new raspberry pi 2 and "Windows 10 IoT Core Insider" mix sounds extremely interesting. Will I be able to run .NET applications on it? Which .NET profile would it be able to support -...
15
votes
5
answers
26k
views
Adjust audio volume level with CLI omxplayer - Raspberry Pi
I have a bash script that plays .mp3 files on my Raspberry Pi via omxplayer. But can not control the local (earphone) audio volume with the GUI. Is there a command for the CLI that I can implement in ...
12
votes
4
answers
30k
views
Can't install zbar
I am trying to use the qrtools module with Python 3.4.2 on my Raspberry Pi 2, however it cannot run as I don't have the zbar module installed.
Trying
pip-3.2 install zbar
Gives the error message ...
11
votes
3
answers
6k
views
Tensorflow on Raspberry Pi
I'm trying to install Tensorflow on Raspberry Pi. The OS is Ubuntu Mate, python2.7 and PIP version is 7.1.2
When I run this
pip install https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-...
11
votes
1
answer
2k
views
Browse file system of Raspberry Pi from android via bluetooth
Use Case:
I am working on a project which involves a android phone and Raspberry Pi. Raspberry Pi unit would be planted with sensors in the field and once in a while user would walk around with the ...
10
votes
2
answers
21k
views
start node app from python script
Is it possible to start a node.js app from within a python script on a raspberry pi?
On the command line I run sudo node myscript.js
could I use a library like os?
10
votes
3
answers
4k
views
How to get the processor serial number of Raspberry PI 2 with Windows IOT
I need to get the processor serial number of a Raspberry Pi2 that is running windows 10 IoT.
10
votes
1
answer
5k
views
WinUSB driver on Windows 10 IoT
I'm trying to use the WinUsb.sys driver that comes with Windows (including Windows 10 IoT of Raspberry Pi 2). Using devcon.exe I can see that the USB I'm trying to use is connected (it is named USB\...
10
votes
2
answers
3k
views
Raspberry PI mdns getaddrinfo 3008 error
I've this sample Node.js script:
var mdns = require('mdns');
var browser = mdns.createBrowser(mdns.tcp('http'));
browser.on('error', function (error) {
console.log("error");
console.log(...
10
votes
2
answers
523
views
HDD temp won't show via web
I'm trying to display my PIs temperatures in a website that I can access anywhere at any time.
So far I've been able to get the CPU and GPU temps working. However my HDD temp won't show in the ...
10
votes
4
answers
2k
views
Choosing a TSDB for one-off smart-home installation
I'm building a one-off smart-home data collection box. It's expected to run on a raspberry-pi-class machine (~1G RAM), handling about 200K data points per day (each a 64-bit int). We've been working ...
9
votes
3
answers
21k
views
RFID RC522 Raspberry PI 2 Windows IOT
I'm looking for a way to use the RFID "RC522" on a Raspberry Pi 2.0 on Windows IOT.
It is of course not offical compatible...
The offical one (OM5577 demo board) is way to expensive in France (i ...
9
votes
4
answers
4k
views
Windows 10 IoT Raspberry Pi 2: Autostart published Application
I'm starting making experience with the Raspberry Pi 2 Development with Windows 10 and I was wondering how can I configurate the Raspberry Pi 2 to autostart my own published application, I developed ...
9
votes
5
answers
26k
views
ImportError: No module named boto3
Installed the boto3 and upgraded it to the latest release. I tried the easy install pip for installation. I have multiple versions of python installed so I even tried installing in virtualenv venv. ...
9
votes
1
answer
3k
views
Failed to open a handle to the device when opening GPIO pin
Everytime I open a GPIO pin I get this exception:
WinRT information: Failed to open a handle to the device.
A resource required for this operation is disabled.
I can't seem to find much information ...
9
votes
1
answer
9k
views
How to INSTALL & RUN QML QtWebEngine & QtWebKit on SBC using Yocto / Unable to fetch URL from any source
Environment
Debian GNU/Linux 7.8 (wheezy) Linux marvin 3.16-0.bpo.2-amd64 #1 SMP Debian 3.16.3-2~bpo70+1 (2014-09-21) x86_64 GNU/Linux
Raspberry Pi 2
Yocto Poky
Qt5
My goal is to run Chromium ...
9
votes
2
answers
2k
views
How can I get an interactive login with Windows 10 IoT Core running on a Raspberry Pi?
I just installed Windows 10 onto a Raspberry Pi. It started up fine and I can connect (using PowerShell) from my laptop.
I can connect a keyboard and mouse to the Pi but I can't get a login window. ...
8
votes
3
answers
9k
views
How to install PHP 5.6 on Raspbian wheezy?
I was wondering about how to install PHP 5.6.x on my Raspberry Pi. Currently version 5.4.41 is installed and because of the new specs i'd like to upgrade to 5.6.10. I've seen this tutorial but the ...
8
votes
1
answer
3k
views
GHCi on raspberry pi 2?
I'm working on a few haskell projects that run on a raspberry pi 2 and the version of ghc that you can install with apt-get from raspbian (7.4.1). It has no GHCi though, which prevents some vital ...
8
votes
2
answers
5k
views
ultrasonic sensor raspberry pi 2 c# .net
I'm trying to read the distance from an ultrasonic sensor (HC-SR04) but the only values I get is 0 and 265.xx.
I am using an Raspberry Pi 2 with Windows 10 IoT Core installed.
I've written the ...
8
votes
3
answers
6k
views
OpenCV Multi Core Support
I was wondering if there is multi core support for the OpenCV library. I am experimenting with Haar cascading and it's pretty slow on my Raspberry 2 which would have four cores, but my application is ...
8
votes
2
answers
6k
views
Intellij IDEA, java and remote development
How to configure Intellij IDEA for compile my java-application on remote machine?
In netbeans I can configure it easily and remote development works perfectly but in Intellij IDEA I can't understand ...
8
votes
2
answers
12k
views
eglfs on raspberry2 -- * failed to add service - already in use?
that's is my first post here.
I'd like to keep it short...
Following problem:
i want to run a qt5/qtquickcontrols2 application utilising the eglfs backend on a raspberry-pi 2b, accelerated by vc4, ...
8
votes
1
answer
2k
views
Windows iot/apps Programmatic Bluetooth Pairing
I'm trying to broadcast a bluetooth signal from a Raspberry Pi 2 running Windows Iot Core so that I can connect to it from smartphones and other devices, but I've been stuck for the last couple days ...
7
votes
6
answers
31k
views
VNC on Raspberry Pi shows Cannot Currently Show the Desktop
I am trying to use VNC in a headless install on my Raspberry Pi 4, running Raspberry Pi OS, installed via Raspberry Imager. The install is more or less vanilla, as the only changes I have made are for ...
7
votes
3
answers
41k
views
Python GPIO code for DHT 11 temperature sensor fails in PI 2
I am facing issues running DHT 11 temperature sensor in PI 2 with Python2.7 GPIO 0.5.11. I am referring to http://www.uugear.com/portfolio/dht11-humidity-temperature-sensor-module/ sample code.
Same ...
7
votes
2
answers
11k
views
OpenCV Python, reading video from named pipe
I am trying to achieve results as shown on the video (Method 3 using netcat)
https://www.youtube.com/watch?v=sYGdge3T30o
The point is to stream video from raspberry pi to ubuntu PC and process it ...
7
votes
1
answer
5k
views
changing update rate with gpsd and python
I'm using the adafruit ultimate GPS breakout with my Raspberry Pi 2 using python2.7.9, GPSD, and the python-gps package. I'm successfully getting gps updates at 1Hz over the serial port.
This device ...
7
votes
1
answer
4k
views
UWP - Streaming WebCam over Socket to MediaElement - Broken Picture?
Background
The code I've written records video clips from a webcam, writes them to a memory stream, then transmits the data across a Socket connection where it's re-assembled into video and played ...
7
votes
1
answer
3k
views
Raspberry Pi Cam with WebRTC & UV4l driver (Sourcecode closed?)
I use the UV4L driver (RasPiCam) from here with the WebRTC extension to get a continuous live view, streaming out from this HTTP server (RaspberryPi).
I would like to examine the sourcecode running ...
6
votes
5
answers
9k
views
LIRC irsend: could not connect to socket irsend: No such file or directory
I am trying to configure LIRC to work with my Raspberry 2B and a circuit I build with a transistor and a IR transmitter as explained in this tutorial
After the installation of LIRC, I followed all ...
6
votes
2
answers
12k
views
Qt Creator proper setup for cross-compilation and remote deployment for the Raspberry Pi 2 - producing binaries for wrong architecture
I just went through hell to setup my Qt Creator, Raspberry Pi and Debian 8 (for my notebook) and finally managed to configure everything. Or so I thought. What follows here is a description of what I ...
6
votes
2
answers
9k
views
How GPIO is mapped in memory?
I am recently browsing GPIO driver for pi2, I found user space pi2 GPIO lib (like RPi.GPIO 0.5.11 of python) use /dev/mem for BCM2708 (begins at 0x20000000,and GPIO begins at 0x200000 relatively) to ...
6
votes
1
answer
12k
views
Python logging module - output to text file when running from command line
I have a python program that uses the logging module to output data to a text file, the problem I have is that the output to the text file works fine when I run the script in PyCharm (the 1-10 values ...
6
votes
2
answers
199
views
How do I name my deployed application?
I've successfully installed Windows 10 IoT on my Raspberry Pi 2. I wrote a test "Hello World" UAP app (simple text box and button, using Visual Studio Community 2015 RC) and can run it on the Pi and ...
6
votes
1
answer
642
views
Shiny Server does not start and returns Trace/breakpoint trap
I thought I had successfully installed Shiny Server on my Debian Wheezy (Raspbian). I got no errors in the cmake and all other required packages were also installed. I followed the instruction on
...
6
votes
2
answers
6k
views
Raspberry Pi -fatal error: sys/cdefs.h: No such file or directory
I'm trying to compile gcc5.3.0 on my Raspberry Pi with latest Raspbian system image.
$ ./configure --enbale-checking=release --enable-languages=c,c++,fortran --host=arm-cortexa7_neon-linux-gnueabihf ...
6
votes
0
answers
18k
views
chromedriver unexpectedly exited. Status code was: 127 [duplicate]
On my raspberry pi I recently got some weird issues with using webdriver.Firefox so I decided to switch to chromedriver, which I am more used to anyway, as I use it when testing stuff on my desktop. I ...