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Python and hardware Study Notes: Bluetooth (2)

step Android phone, and then here link: http://pan.baidu.com/s/1pJNwpdT password: x5f3download a pair of Bluetooth switch .apk ". Log on to Raspberry Pi and create a Python file: bluetooth. py: #-*-Coding: UTF-8-* # encoding method import serial # contains the corresponding library import timeimport RPi. GPIO as GPIO. setwarnings (False) # cancel warning GPIO. setmode (GPIO. BCM) # Set the pin encoding method GPIO. setup (21, GPIO. OUT) # Set the GPI

Several Methods to Improve Raspberry Pi's network stability.

If you want to use Raspberry Pi as a small server, the performance may be poor, but the stability must be ensured. The following describes how to improve the stability of Raspberry Pi on the network. 1) modify it in/etc/sysctl. confVM. min_free_kbytes(8192 to 16384) # RPI tweaksvm. swappiness = 1 # VM. min_free_kbytes = 8192vm. min_free_kbytes = 16384 The USB driver allocates memory from the kernel. When the network load is heavy, the memory may b

Latex resume tips (zz)

resumes on the Web. Search for them and use them for ideas and formatting examples. Use at least your middle initial and possibly your entire middle name on your resume. the Internet is expanding rapidly and chances are someone out there has the same first and last names as you. as an added bonus, it also sounds more than formal. Links My resume: resume. Tex, resume. ps, resume.pdf Latex resume class-by Miklos csuros Latex resume classes at ctan Latex resume templates at

Installing Ros on the raspberry

, suitable for all robot applications. I choose to install this.Rosinstall_generator Desktop--rosdistro Indigo--deps--wet-only--exclude roslisp--tar > indigo-desktop-- J8 src Indigo-desktop-wet.rosinstallIf the download is interrupted in the middle, the following command will download4 -t SRCInstall some packages that are not in the Raspbian warehouse$ mkdir ~/ros_catkin_ws/external_src$ sudo apt-get'echo ' DEB-SRC/HTTP/ Mirrordirector.raspbian.org/raspbian/testing Main contrib non-free

Installing ROS Indigo on the Raspberry Pi

available for Raspbian: Raspbian Wheezy:libconsole-bridge-dev, Liburdfdom-headers-dev, Liburdfdom-dev, Liblz4-dev,collada-dom-dev Raspbian Jessie: Collada-dom-dev The following packages is needed for each ROS variant: Ros_comm: Libconsole-bridge-dev, Liblz4-dev Desktop:libconsole-bridge-dev, Liblz4-dev, Liburdfdom-headers-dev, Liburdfdom-dev, Collada-dom-dev The required packages can built from source in a NE W Directory: $ mkdir ~/ros_ws/external_src$ sudo apt-get'echo ' DEB-SRC/

Research Group on Natural language processing at home and abroad

processing Group http://nlp.stanford.edu/The Berkeley NLP Group http://nlp.cs.berkeley.edu/index.shtmlNatural Language and information processing the Group atUniversity of Cambridge http://www.cl.cam.ac.uk/research/nl/The Language Technologies Institute (LTI) at Carnegie Mellon University http://www.lti.cs.cmu.edu/The computational linguistics Group at Oxford University http://www.clg.ox.ac.uk/Human Language Technology and Pattern recognition Group at the RWTH Aachen https://www-i6.informatik.r

Deploy Tonido on Raspberry

Putty connecting to RaspberryRunsudo mkdir /usr/local//usr/local/tonidosudowget http:// patch.codelathe.com/tonido/live/installer/armv6l-rpi/tonido.tar.gzsudotar -zxvf tonido. Tar . gz. /tonido. SH startMy hint nohup:redirecting stderr to stdout, ignore.Enter the address of Http://Raspberry in the browser address bar: 10001, enter the Web registration page.Fill in the information registration complete.Next, set up the folder you want to shareFinish t

Install the Python and OpenCV tutorials on the Raspberry Pie 2 or the raspberry Pie B + _python

of motion detection and tracking, when I was making a phone call and walking back and forth in my apartment.install OpenCV and python on the raspberry Pi 2/b+ This assumes that you already have the Raspberry Pi 2/b+, and that it is already installed. If not, I suggest you buy one, they are both cheap and fun. Personally, I'd rather spend a little more money buying from Canakit. Their logistics quickly and reliably, plus their ready-to-go service is also very good. Okay, let's start OpenCV an

Install OpenCV and Python__python on the raspberry Pi 2/b+

This assumes that you already have the Raspberry Pi 2/b+, and that it is already installed. If not, I suggest you buy one, they are both cheap and fun. Personally, I'd rather spend a little more money buying from Canakit. Their logistics quickly and reliably, plus their ready-to-go service is also very good. Okay, let's start OpenCV and Python installation.Step 0: We assume that you have opened Raspberry Pi 2/b+. To open the terminal, we first update and upgrade the installed packages, and then

Activiti Basic Tutorial--10 Start active node, receive activities, user tasks (personal tasks, group tasks)

;SYSTEM.OUT.PRINTLN ("Deployment Name:" +deployment.getname ());// } /** Start process instance + determine whether the process is over + query history */ @Test public voidstartprocessinstance () { //process-defined key StringprocessDefinitionKey= " Start "; ProcessInstancepi= Processengine.getruntimeservice ()//service associated with the executing process instance and execution object . Startprocessinstancebykey (Processdefinitionkey);//Use process-defined key to start the process instan

Raspberry Pi FFmpeg supports GPU hard decoding

1. Installing x264 git clone git://git.videolan.org/x264.git ./configure \ --enable-shared \ --enable-static \--enable-strip \--disable-cli Make sudo make install 2. Installing FFmpeg git clone git://source.ffmpeg.org/ffmpeg.git ./configure \ --ENABLE-GPL \ --enable-version3 \ --enable-nonfree \ --enable-static \ --enable-ffmpeg \ --disable-ffplay \ --disable-ffprobe \ --disable-ffserver \ --disable-doc \ --disable-htmlpages \ --disable-manpages \ --disable-podpages \ --disable-txtpages \ --en

Set the Raspberry Pi raspberry to the wireless router (WiFi hotspot ap,rtl8188cus chip)

http://wangye.org/blog/archives/845/Recently began to toss up Raspberry Pi came, because somewhere in the internet need Ruijie dialing, so I would like to be able to let my Raspberry Pi do, of course, first of all to transform it into a router, the default comes with the network as a WAN port, we also lack a network port, Wood has a way, had to occupy a USB port, Connected to a USB card, the network of USB to RJ45 network cable adapter Less, the price is not cheap, so consider simply transform i

Raspberry Pi, a playful pie: Seventh quarter RASPBMC (UP)

cylinders, total 15730688 sectors Units = sectors of 1 * bytessector size (logical/physical): bytes/512 bytesi/o size (minimum/optimal): 512 bytes/512 bytesdisk identifier:0x3ac32cfc Device Boot Start End Blocks Id system/dev/sdb1 4096 147455 71680 C W95 FAT32 (LBA)/dev/sdb2 151552 2662399 1255424 83 Linux6. StartPlug the SDcard into the RPI and power up. As follows:The main interf

Install OpenELEC on Raspberry Pi 2

output mode may not be ideal. At this time, you need to adjust it. Raspberry Pi 2 does not have a traditional BIOS, so some underlying configurations such as HDMI output areconfig.txtFile implementation. This operation can certainly be performed on a terminal via SSH remotely. However, here we will introduce a small plug-in that can be completed through a graphical remote control. This process is simplified. OpenELEC RPi Config is a third-party Kodi

Use Raspberry Pi to send push notifications to smartphones

to install the Python library. Sudo apt-get install python-pycurl Python code The following is the Python code I have compiled. The comments in the code should be able to explain well what I am doing. Name the program doorSensor. py. You can download the source code here. # ------------- Begin doorSensor. py ------------------# Import pycurl, jsonFrom StringIO import StringIOImport RPi. GPIO as GPIO # Setup GPIO using Broadcom SOC channel numberingGP

How to Build the Net and NodeJS runtime environments of Raspberry Pi, raspberry nodejs

/apt/ mv sources. list sources. list. bak (back up existing source files) sudo nano/etc/apt/sources. list (add new configuration file) ======================== deb http://mirrors.cqu.edu.cn/Raspbian/raspbian/ wheezy main contrib non-free rpi (add an image from Chongqing University) ctrl + O, Enter, Ctrl + X save and exit ==================== sudo apt-get update apt-get upgrade (test updates) File authorization. Do not abuse it. The sudo chmod 777/xxx

How to run Ubuntu Snappy Core in Raspberry Pi 2

the default username and password (both ubuntu) to log on to the system. You can use sudo directly after it is configured. For security reasons, you should use the following command to modify your user name. $ sudo usermod -l Or you can useadduserAdd a new user for you. Because RPI lacks the hardware clock and the Snappy Core image does not know this, the system has a small bug: many errors will be reported when processing some commands. However

Delphi Pointer Encyclopedia (the light does not practice is not learning)

pointersPi:pinteger;BeginP: = @R; Remove the memory address of RPI: = Pinteger (P); Converts a generic type to a pointer to an integer typeI: = pi^;EndOf course, real numbers and integers are stored in different formats. This assignment is to copy the original binary data from R to I without converting it.The reserved word nil is a special constant that can be assigned to any pointer type, and when nil assigns a pointer, the pointer does not point to

Windows Ten on Raspberry Pi 2 (this is the starter)

Look at build 2015 in the middle of the night, basically heard 3, 4 times "Raspberry Pi", but always did not demonstrate win10 in the RPI above what kind of, so ... Try it yourself. First the pit is DISM: see an Ffu file, read the instructions, that is DISM directly deployed to the SD card. So is it possible to use LINUX+DD? Try it, no ... Then using win8.1 for DISM, found error 87, go back to look at the Microsoft IoT page, incredibly need to win10

Raspberry Pi: Starting to understand.

command line:sudo rpi-updatesoftware upgrade and installationThe Debian system has its own software distribution mechanism. You can find the software you need from the software server (software source) and download the installation. Most of the operations can be done by using the Apt-get command on the command line. Raspbian the same mechanism.Update the software source to get the latest software list:sudo apt-get updateTo upgrade installed software:

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