Author: Manish

WP Code Highlight – gives preg_replace error

With updated PHP version WP Code Highlight – gives preg_replace error. Do the following. Remove the “e” from /ise return preg_replace_callback(“/<pre(.*?)>(.*?)<\/pre>/is”, function($m){ return “<pre class=’wp-code-highlight prettyprint$line_numbers’>”.wch_stripslashes($m[2]).”</pre>”; }, $content);

Setup Free SSL Certificate on your Server

Please note : This article (and the repo mentioned here) is deprecated. Certbot now recommends installation through Snap. For more details please see – https://certbot.eff.org/docs/install.html. More info at: https://launchpad.net/~certbot/+archive/ubuntu/certbot Electronic Frontier Foundation (EFF) provides Let’s Encrypt SSL Certificates through their  Certbot service. They don’t provide any Organization Validation (OV) or Extended Validation (EV)  certificate. As per… Continue reading Setup Free SSL Certificate on your Server

How to Setup MQTT Server on a Windows 10 Desktop

Download the Win32 installer from the below link (I couldn’t successfully installed the CygWin version) https://mosquitto.org/download/ Once downloaded, install the package During the start of the installation process it will show links from where some dependencies will have to be downloaded Copy/Open the links Once the installation finishes go to the websites opened in the… Continue reading How to Setup MQTT Server on a Windows 10 Desktop

Arduino as an Oscilloscope

Yes an Arduino can be used as Oscilloscope without any additional hardware. Burn this code to Arduino const int probePin = A0;   void setup() { //Setup serial connection Serial.begin(9600); }   void loop() { //Read analog pin int val = analogRead(probePin);   //Write analog value to serial port: Serial.write( 0xff ); //can be skipped… Continue reading Arduino as an Oscilloscope