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ESP8266-EVB from Olimex

ESP8266-EVB from OLIMEX IS EVALUATION BOARD FOR ESP8266 WITH RELAY, BUTTON, UEXT, ALL GPIOS AVAILABLE ON 0.1″ HEADER ESP8266 is very highly integrated SOC which includes Xtensa LX106 core processor, RAM, RF front end and allow WIFI TCP-IP stack to be implemented

ESP8266

The ESP8266 from Espressif is a highly integrated chip designed for the needs of an increasingly connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host applications or offload all Wi-Fi networking functions from

Raspberry Pi 2 Model B GPIO 40 Pin Block Pinout

Raspberry Pi 2 Model B GPIO 40 Pin Block Pinout Source element14

Raspberry PI version 2 (BCM2836)

A new version of RPi has been anounced on February 2015 at the same price as RPi B+! This is a Quad-Core 900MHZ ARM A7 processor and 1GB of RAM memory. Broadcom were willing to step up with a new

Please welcome Kodi!

Kodi (formally known as XBMC) is an software media player and entertainment hub that can be installed on Linux, OSX, Windows, iOS, and Android, featuring a 10-foot user interface for use with televisions and remote controls. It allows users to

Yii2: create helper

How to create a new helper in Yii2 framework: Create a new file “Utils.php” in “app-basic\helpers” or in other folder, location is up to you, but keep things organized!

&lt;?php
namespace yii\helpers;
use Yii;
class Utils
{
public static function pre($mixed_data)
{ 
print '&lt;pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; 
white-space: -o-pre-wrap; 
background: #faf8f0; border: 1px solid silver; 
padding: 2px; font-weight: normal; font-family: Monospace, Courier"&gt;';
print_r($mixed_data);
<span style="line-height: 1.1em;">print '&lt;/pre&gt;'; 
</span><span style="line-height: 1.1em;">}
</span><span style="line-height: 1.1em;">public static function code($mixed_data)
</span><span style="line-height: 1.1em;">{
<span style="line-height: 1.1em;">
print '&lt;code style=" display: block; 
padding: 0.5em 1em; border: 1px solid #bebab0;"&gt;';
</span></span><span style="line-height: 1.1em;">print_r($mixed_data);
</span><span style="line-height: 1.1em;">print '&lt;/code&gt;';
</span><span style="line-height: 1.1em;">} 
</span>}

<?php

namespace yii\helpers;

use Yii;

class Utils

{

public static function pre($mixed_data)

{

print '<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap;

white-space: -o-pre-wrap;

background: #faf8f0; border: 1px solid silver;

padding: 2px; font-weight: normal; font-family: Monospace, Courier">';

print_r($mixed_data);

print '</pre>';

}

public static function code($mixed_data)

{

print '<code style=" display: block;

padding: 0.5em 1em; border: 1px solid #bebab0;">';

print_r($mixed_data);

print '</code>';

}

}

In this helper we have 2 functions to display raw

PHP short tags: if/else

Alternative syntax for control structures. PHP offers an alternative syntax for some of its control structures; namely, if, while, for, foreach, and switch. In each case, the basic form of the alternate syntax is to change the opening brace to

Raspberry PI install RPi.GPIO

To install on raspbian:

apt-get -y install python-rpi.gpio

1	apt-get -y install python-rpi.gpio

raspberry-gpio-python package provides a class to control the GPIO on a Raspberry Pi. To get started with RPi.GPIO, it would be worthwhile reading the examples here. Note that this module is unsuitable for real-time or timing critical

Linux: Netstat Command Examples

Netstat command displays various network related information such as network connections, routing tables, interface statistics, masquerade connections, multicast memberships etc. List All Ports (both listening and non listening ports) #netstat -a

root@localhost:~# <strong>netstat -a</strong> | more
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:mysql *:* LISTEN
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
udp 0 0 *:openvpn *:*

Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ACC ] STREAM LISTENING 8963 /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 9988 /var/run/mysqld/mysqld.sock
unix 2 [ ACC ] STREAM LISTENING 10048 private/proxymap

root@localhost:~# netstat -a | more

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 *:mysql *:* LISTEN

tcp 0 0 *:http *:* LISTEN

tcp 0 0 *:ftp *:* LISTEN

tcp 0 0 *:ssh *:* LISTEN

udp 0 0 *:openvpn *:*

Active UNIX domain sockets (servers and established)

Proto RefCnt Flags Type State I-Node Path

unix 2 [ ACC ] STREAM LISTENING 8963 /var/run/dbus/system_bus_socket

unix 2 [ ACC ] STREAM LISTENING 9988 /var/run/mysqld/mysqld.sock

unix 2 [ ACC ] STREAM LISTENING 10048 private/proxymap

List all tcp ports #netstat -at

root@localhost:~# <strong>netstat -at</strong>
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:mysql *:* LISTEN
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN

root@localhost:~# netstat -at

Active Internet connections (servers and established)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 *:mysql *:* LISTEN

tcp 0 0 *:http *:* LISTEN

tcp 0 0 *:ftp *:* LISTEN

tcp 0 0 *:ssh *:* LISTEN

Find

mysqld Option/Variable Reference

This table that lists every MySQL Server option or variable, what version it was introduced or deprecated in, whether it’s dynamic or not, whether variables have session/global/both scope, and links to the version-specific documentation for that variable. Name Intr Depr