raspberry-pi2

问题 The question is similar to question in this thread Windows IoT - Zebra Bluetooth Printer . I have a Zebra GX420d printer. The only difference is, it is not connected via Bluetooth but via USB. I can't seem to get it paired with my raspberry pi 2. I need to print something out (like "Hello world"). Please help. Update: So, i installed the usb driver for the printer, now the Raspberry can see it, but i still can't write anything to the printer. Now i get the "Attempted to read or write

问题 I am trying to scan a USB drive that is inserted into a Raspberry Pi running Windows 10 IoT Core for a specific file in a specific folder. I am currently able to detect when a USB drive is added or removed from the device using Windows.Devices.Enumeration.DeviceWatcher and can find the DeviceId using that as well. I did this using the DeviceEnumerationAndPairing demo project. I am aware that StorageDevice.FromId() would work for this usually but it seems to not agree with Windows 10 IoT Core.

问题 I am trying to control an LED on my Raspberry Pi with the Pubnub platform. I just started and I tried this tutorial: https://www.pubnub.com/blog/2015-05-27-internet-of-things-101-getting-started-w-raspberry-pi/ However, when I want to execute a Python file that imports the Pubnub library with the following line: from pubnub import Pubnub I get this error message: ImportError: cannot import name Pubnub I did everything exactly as told in the tutorial. I even copied the .py classes from their

问题 I am attempting to teach myself programming and keep running into problems downloading modules I need for basic tutorials. My latest attempt has been to get the matplotlib module into my Python 3 environment. I have tried so many different install packages and so many advice I found on the internet that I cannot remember how I originally got the module. But it seemed that everything went well with the installation process. I am using a Raspberry Pi2 throughout all of this with the Raspbian OS

问题 Desperate. Say we have the following: def main(): ALotOFCode list1 = [] list2 = [] while condition: # a lot of times where raw_input is used in this loop # e.g. x = raw_input('lots of steps to compute x') y = raw_input('lots of steps to compute y') list1 = list1.append(x) list2 = list2.append(y) stream.write({'x':list1,'y':list2}) #send new data point to plot.ly via raspberry pi I don't know what happened. But my plot in plot.ly is gone. Deleted completely. I was messing with what I had on

问题 I am trying to build OpenCV with TBB to enable multi-threading. Note: I am able to build OpenCV-2.4.10 without TBB from source and then use the OpenCV Python bindings. When I try a fresh install and building OpenCV with TBB installed the WITH_TBB=ON flag I am then unable to import cv2 - I take this to mean something has gone wrong in the build process. Here's how I'm trying to do it: # Download, unpack and build TBB: wget -O ~/tbb43_20150316oss_src.tgz --no-check-certificate https://www

问题 I need to get the processor serial number of a Raspberry Pi2 that is running windows 10 IoT. 回答1: Usually this is within the Windows.System.Profile.HardwareIdentification namespace. Unfortunately, that's one of the unsupported namespaces with Win10 IoT Core. Instead, to identify the metal, I'm using info from the network adaptor(s): public static HashSet<string> NetworkIds() { var result = new HashSet<string>(); var networkProfiles = Windows.Networking.Connectivity.NetworkInformation

问题 I tried both the November 2015 release (build 10586) and the Feb 2016 Insider Preview release (build 14262), however my USB microphone is not working with Windows 10 IOT core . Scenario: I am creating a speech recognition based program using windows IOT Core. I am using Windows.Media.SpeechRecognition api for this job. When I run the program on a simulator in my Window 10 PC using Visual Studio 2015, microphone works and sound gets detected and the program functions as required. However when

问题 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 packages (like Vector) from compiling. I've seen a few rumors about being able to get later versions of ghc (with ghci) onto the pi, but nothing recent. The entry on the haskell wiki looks a couple years out of date. Has anyone had any luck with this? 回答1: I have had some luck with this! sagemuej

问题 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 layout web engine on the RPi2 I want to be able to run this on my RPi2: import QtQuick 2.1 import QtQuick.Controls 1.1 import QtWebEngine 1.0 ApplicationWindow { width: 1280 height: 720 visible: true WebEngineView { id: webview url: "http://www.qt-project.org" anchors.fill: parent } } How I created my