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Http://blog.csdn.net/c80486/article/details/8460325
If Raspberry Pi is made into an electric appliance, several actions must be supported when it is powered on.
1. Automatic Logon
2. automatically run the startx startup Window System
3. After the window system is started, it automatically runs the custom program (generally the main interface of the application)
1. Raspberry Pi has been on the black screen for some time, which is what we often call the suspend state. So please use the Xset tool to set it up.Xset s offXset DPMS 0 0 02.apt-cache Search: Find some of the necessary installation software3. Do not let the Raspberry Pi into the screensaver, is X Window's black screen
value is-1, 0, it indicates timeout, and 1 indicates successful interruption. Before calling this function, we need to initialize gpio.
For example, we want to set gpio 0 to wait for the disconnection of the descent edge:
We need to run gpio edge 0 falling on the terminal before running the program.
2. Int wiringpiisr (INT pin, int edgetype, void (* function) (void ));
This function uses a function as a parameter to obtain the interrupt at a
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The first route is very simple, that is, reading the index template (the template is html) and sending it to the client (browser), because the path is "/", that is, for example, the IP address of Raspberry Pi is 192.168.0.10.
Use http: // 192.168.0.10: 8080 to access our "/" route (the default port of the bottle is 8080)
Similarly, the second route path is "/cmd", that is, access ht
=6800Continue=trueInput-file=/etc/aria2/aria2.sessionSave-session=/etc/aria2/aria2.sessionMax-concurrent-downloads=3Start aria2Test$ aria2c--conf-path=/etc/aria2/aria2.conf-d background Run$ vi/etc/rc.local boot upAdd sudo aria2c--conf-path=/etc/aria2/aria2.conf-dInstalling AppacheApt-get Install Apache2-ychmod 777/var/wwwInstalling YAAWDownload the Yaaw and copy the contents of the extracted folder to the/var/www folder after downloading.In the brows
# Modify the configuration file
Raspberry Pi has integrated the I2C driver and only needs to be started.
Modify configuration file
Sudo nano/etc/modprobe. d/raspi-blacklist.conf
! [Configure] (http://images.cnblogs.com/cnblogs_com/hangxin1940/466697/o_rasp_i2c1.png "comment the third line ")Comment out the third line, CTRL + x save
Next, start the I2C module.
Sudo nano/etc/modules
! [Configure] (ht
Install Qt in Raspberry Pi
Blog link:Http://blog.csdn.net/jdh99, Author: jdh, reprinted please note.
Environment:
HOST: win7
Hardware: Raspberry Pi
Steps:
Reference: http://qt-project.org/wiki/apt-get_Qt4_on_the_Raspberry_Pi
firstly I got the development tools needed by QT creator
Raspberry PI Series--bare metal illuminated LED lightsBackgroundRecently just bought Raspberry PI B +, configured to run the official Raspbian system, tossing a week Linux system, feel no meaning, so try to understand the bottom of the start process, through a few days of re
0. Power supply is micro USB (Android power connector)
1. Download the operating system from the official website and write the memory card with Win32diskimager.
2. Locate the IP and set the static IP under the router:
Command: sudo vi/etc/network/interfaces
Switch
Auto LoIface Lo inet LoopbackIface eth0 inet StaticAddress 192.168.1.88Netmask 255.255.255.0Gateway 192.168.1.1Allow-hotplug Wlan0Iface Wlan0 inet ManualWpa-roam/etc/wpa_supplicant/wpa_supplicant.conf
3. Computer network cable direct
1. System Installation1.1. Download Ubuntu-mate Image: https://ubuntu-mate.org/raspberry-pi/Download SDFORMATTERV4: https://www.sdcard.org/downloads/formatter_4/Download win32diskimager:https://sourceforge.net/projects/win32diskimager/1.2. Prepare a TF card greater than 8GB, using SDFORMATTERV4 format TF1.3. Write Ubuntu-mate Mirror (ubuntu-mate-16.04-desktop-armhf-rasp
Raspberry Pi apt software management tool
The easiest way to manage installation, upgrade, and uninstall software is to use APT (Advanced package management tool) On Debian ). If a software package into a Debian package and is applicable to Raspberry Pi's ARM architecture, the package is also compatible with Raspbian.
You need the root user permission to install
Today I turned over the old data and found something. When the company's servers were not in place (startups had no way).Talking about the server, a colleague took out his raspberry Pi.I think, I can do it. Go would have supported multiple platforms. Redis is written in C and should not be a problem.Finally, although the middle walk a little detour, but fortunately, can run up.Golang:1. Download the 1.4.2 s
The Raspberry Pi file directory is a must-have basic knowledge. Understand the distribution of files within the system.
Structure of the Directory
The role of the directory
Reference Blog/bin Binary executable command /dev device special files /etc system administration and configuration Files /etc/rc.d Startup configuration files and scripts /home base point of user home director
The hand has a CCD Camera (Barcode reader/scanner Module), it is through RS232 communication, with the RS232 to the USB adapter to connect the Raspberry Pi, you can complete the hardware connection. For serial communication, it can be realized by pyserial.First, install Pyserial:Download the latest version of the installation package from Https://pypi.python.org/pypi/pyserial and complete the installation w
1. Configure the PlatformSource: http://www.cnblogs.com/xiaobo-Linux/p/7955769.html2. Select Remote3. Fill in the informationThe JRE path is the path on the Raspberry Pi: how?sudo update-alternatives--display javaOutputJava-auto modeLink Best version Is/usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/bin/javaLink currently points To/usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/bin/javaLink Java Is/usr/bin/javaSl
(recommended)-l,–ignore-locks ignore locked state reported by the target APIgnore the locked status reported by the target AP-e,–eap-terminate terminate each WPS session with an EAP FAIL packetTerminates the WPS process whenever an EAP failure packet is received-n,–nack Target AP always sends a nack [Auto]Always send Nack to target AP, default auto-w,–win7 Mimic a Windows 7 registrar [False]Analog win7 registration, default offReference:Http://lok.me
usable Nowmaxlogsize 0# only listen for connections from the local machine. Listen *:631listen/var/run/cups/cups.sock# Show shared printers on the local network. Browsing Onbrowselocalprotocols dnssdbrowseallow all# Default authentication type, when authentication is required ... Defaultauthtype basic# Web Interface setting ... Webinterface yes# Restrict access to the Server... # Start Printersudo service cups start# set static Ipsudo vi/etc/dhcpcd.c
The problem is the Web server built on the Raspberry Pi, want to control the Raspberry Pi Gpio through the Web page, the webpage is implemented by PHP, through the PHP exec function call write good program implementation of the GPIO operation, but depend what no effect, analysis also know is the authority problem, The
Mr. Kim. Wu
No.: mrkimwu
QQ: 1315371422
In the previous article "Raspberry Pi's Application in ID card verification", I briefly introduced and implemented the function of Raspberry Pi's reading with ID card. However, reading the local machine is far from enough.
The retrieved ID card information is sent to the remote backend server over the network for data query, judgment, and storage.
The following descr
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