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
Raspberry Pi-Cron, Crontab (scheduled task), croncrontab
Cron is a tool for configuring scheduled tasks in Unix systems. It is used to execute commands or scripts on a regular basis or at a certain interval; the task scope can be to automatically back up the user's home folder every night, or to record CPU information logs every hour.
The crontab (cron table) command is used to edit the list of scheduled ta
On-line tutorials, general Python with Rpi.gpio to control the Raspberry Pi Gpio, and C + + generally use WRINGPI library to operate Gpio,rpi.gpio too simple, many advanced features do not support, such as I2C/SPI library, etc., but also lack of high-precision timing and other advanced features. In contrast, WIRINGPI is rich in functionality, but in fact WRINGPI already has Python bindings that can be very
Raspberry Pi Installation Php+nginx process:1. Install PHP Environment:sudo apt-get install nginx php5-fpm php5-cgi php5-cli php5-curl php5-gd php5-mcrypt php5-mysql php5-memcache php5-gd php5- SQLite php5-cgi php5-xmlrpc mysql-server mysql-clientIf you don't need a MySQL environment, remove the last two mysql-server mysql-clientAt that time, there is no package, even if the update is not possible, then ref
This is a creation in
Article, where the information may have evolved or changed. 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 m
The raspberry Pi2, introduced in February 2015, cannot be installed Lazarus with the previous method, and when installing the FPC, the following problem stops the installation.Find a solution from http://otapi.com/2015/02/10/raspberry-pi-2-freepascal-lazarus-and-delphi/:1. Installing Subversion and unzipSudo apt-get UpdateSudo Apt-get Install Subversion UNIZP2. g
After using Rspberry pi, learn about Ros as an open-source robotic operating system.The earliest use of raspberry Pi 2B +raspbian Jessie successfully installed with the source of Ros Indigo, and then change the RaspberryPi3, try again on how unsuccessful.Later, no matter, looking for a transplant raspberrypi 3B Debian 9 arm64 method, successfully
The wireless adapter must be supported by Raspberry Pi. You can go to the official or http://shumeipai.net to view the hardware list
Either of the two solutions can not be changed
# Solution 1
# Configure network interfaces
Sudo nano/etc/Network/interfaces
The default file content is as follows:
Auto Lo
Iface lo Inet loopbackIface eth0 Inet DHCP
Allow-hotplug wlan0Iface wlan0 Inet ManualWPA-roam/etc/wpa_su
First, sign up for a NOIP account .Refer to this tutorial: http://www.cnblogs.com/infopi/p/3991407.htmlCreate a DirectoryLine 1th enters the current user's home directoryLine 2nd establishes the Noip subdirectory, line 3rd enters the Noip subdirectoryCD ~mkdir NoipCD NoipDownload Noip client source, installThe 1th line to download the source code, the 2nd line decompression source code, 3rd line into the extracted source directory4th line compilation, line 5th installationwget http://www.no-ip.c
and is easily downloaded and modified by the reader.The following books will not be introduced, share the graphic coverHere is still to recommend my own built Python development Learning Group: 725479218, the group is the development of Python, if you are learning Python, small series welcome you to join, everyone is the software Development Party, not regularly share dry goods (only Python software development-related), Including a copy of my own. 2018 Latest Python Advanced materials and high
Let's see if there are any of the following alternatives, and if not, you need to update the software source:
Install in sequence:
sudo apt-get installqtcreator
sudo apt-get installqt4-default
sudo apt-get install Qt4-designer
sudo apt-get install Qt4-qmlviewer
sudo apt-get install Qt4-qmake
Move the qwt6.1.3 to the Raspberry
that the appropriate content is modified according to the actual situation:
[Unit]
Description=wireless Static IP Connectivity
Wants=network.target
Before=network.target
[Service]
Type=oneshot
Remainafterexit=yes
Environmentfile=/etc/conf.d/wifi
EXECSTART=/SBIN/IP Link Set Dev wlan0 up
EXECSTART=/SBIN/IP addr Add 192.168.34.1/24 broadcast 192.168.34.255 Dev Wlan0
EXECSTOP=/SBIN/IP addr Flush Dev Wlan0
EXECSTOP=/SBIN/IP Link Set Dev
' * ' in these fields (for ' any '). ## Notice that tasks would be started based on the Cron ' s system# daemon ' s notion of time and timezones.## Output of the crontab jobs (including errors) is sent through# Email to the user of the crontab file belongs to (unless redirected).## For example, you can run a backup of all your user accounts# at 5 a.m. every week with:# 0 5 * * 1 tar-zcf/var/backups/home.tgz/home/## For more information see the manual
A lot of relevant online tutorials, here is not detailed, mainly in the installation after the completion of the page will appear blank, unable to parse the normal PHP.1. Install PHP Environment:sudo apt-get install nginx php5-fpm php5-cgi php5-cli php5-curl php5-gd php5-mcrypt php5-mysql php5-memcache php5-gd php5- SQLite php5-cgi php5-xmlrpc mysql-server mysql-clientIf you don't need a MySQL environment, remove the last two mysql-server mysql-client2. Modify the Site configuration file:sudo na
Linux-Raspberry Pi system partition
There are two main partition commands: fdisk and parted.Both commands require the root permission,First, we will introduce the fdisk command: Fdisk allows you to view the usage of the current file system.
fdisk -l
Because I installed the system on the SD card, the partition starts with/dev/mmcblk0. We can see that there are currently three actual partitions (/dev/mmcblk
Invalid signature for Kali Linux repositories: "The following signatures were Invalid:expkeysig Ed444ff07d8d0bf6 Kali Li Nux Repository "Today intends to update Kali, found that the above problems, Google was found to be due to the digital signature expired:
Note that if you do not update the Kali installation (TSK2) for a period of time, you will want to receive a GPG error (ED444FF07D8D0BF6) about the expiration of the repository key. Fortunately, this issue can be resolved quickly by
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