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How to Setup MQTT Server Using Mosquitto and Libwebsocket on Freebsd

May 30, 2019 by Lorensius Londa Leave a Comment

Recently i'm working on IOT project that needs to send data from ESP32 development board to web browser and mobile devices using MQTT protocol. The MQTT connection between the board and other clients didn't have problems using standard/native MQTT protocol, but it came into problem when the client … [Read more...] about How to Setup MQTT Server Using Mosquitto and Libwebsocket on Freebsd

Blue Bamboo P25 Printer Android Demo Application With Source Code

February 28, 2014 by Lorensius Londa 22 Comments

Blue Bamboo P25 printer is a lightweight and portable thermal printer that provides low cost printing in mobile and wireless environments. It supports mobile application printing over Bluetooth, USB or Serial port (RS-232). It also has a good connectivity with Android device, makes printing from … [Read more...] about Blue Bamboo P25 Printer Android Demo Application With Source Code

Simple JSON RPC Client for Android

January 11, 2014 by Lorensius Londa 2 Comments

This is a simple JSON RPC Client for Android. I wrote this class for one of my Android projects that needs to connect to external JSON RPC API. Feel free to use it, download the files at the bottom of this post..;) JSON RPC Client How to use it: [ad] Download Simple JSON RPC … [Read more...] about Simple JSON RPC Client for Android

How to Send Message to Google Cloud Messaging (GCM) Server Using JSON and PHP

August 25, 2012 by Lorensius Londa 8 Comments

Google Cloud Messaging (GCM) is a free service from Google that helps Android developers to send data from their servers to Android applications on Android devices. GCM is the next generation of Android Cloud to Device Messaging (C2DM) which is currently deprecated but still in service without … [Read more...] about How to Send Message to Google Cloud Messaging (GCM) Server Using JSON and PHP

How to Use Multi-User Feature in Android Jelly Bean

August 21, 2012 by Lorensius Londa 1 Comment

Have you ever imagine multi user account feature found in desktop operating system (Windows, Mac, Linux) that enable you to login using different user account now can be found on mobile operating system? Yes, Android 4.1.1 aka Jelly Bean, the latest version of Android operating system has this … [Read more...] about How to Use Multi-User Feature in Android Jelly Bean

How to Root Galaxy Nexus Jelly Bean with SuperSU

August 21, 2012 by Lorensius Londa 1 Comment

Android 4.1.1 aka Jelly Bean is the latest version of Android OS that makes us impressed with its outstanding performance in UI experience that makes UI very responsive and smooth. This new version of Android OS has been pushed by Google to Google's flagship phones, Galaxy Nexus and Nexus S using … [Read more...] about How to Root Galaxy Nexus Jelly Bean with SuperSU

How to Manually Update GSM Nexus S to Android Jelly Bean (Android 4.1.1)

July 30, 2012 by Lorensius Londa Leave a Comment

This tutorial might be the copy of my previous tutorial on how to manually update Nexus S to Android ICS 4.0.4 but with different Android version..the latest Android 4.1.1 a.k.a Jelly Bean. This tutorial is only for GSM version of Nexus S (i9020t/i9023 and i920a). Before doing update, make sure you … [Read more...] about How to Manually Update GSM Nexus S to Android Jelly Bean (Android 4.1.1)

How to Enable Android Jelly Bean OTA Update on Nexus S

July 24, 2012 by Lorensius Londa Leave a Comment

Hello Droiders, Google has just pushed Jelly Bean (Android 4.1.1) OTA update for their flagship phone, Google/Samsung Nexus S. Normally this OTA update can be checked and downloaded from System Update menu on Settings. However, not all Nexus S phone get this OTA update. So if your Nexus S does not … [Read more...] about How to Enable Android Jelly Bean OTA Update on Nexus S

How to Manually Update GSM Nexus S from Stock ICS 4.0.3 to ICS 4.0.4

March 29, 2012 by Lorensius Londa 1 Comment

Google just rolled out Android 4.0.4, Ice Cream Sandwich, to UMTS/GSM Nexus S, Xoom Wi-Fi, and HSPA+ Galaxy Nexus devices. This update improves existing Ice Cream Sandwich experience with stability improvements, better camera performance, smoother screen rotation, improved phone number recognition … [Read more...] about How to Manually Update GSM Nexus S from Stock ICS 4.0.3 to ICS 4.0.4

How to Send Image to Twitpic from Android

September 9, 2011 by Lorensius Londa 39 Comments

Twitpic is one of the most common used image hosting that allows users to easily post images to Twitter and other social media. Twitpic can be used independently of Twitter, in a way similar to Google Picasa or Flickr. TwitPic usernames and passwords are the same as the ones in Twitter so it doesn't … [Read more...] about How to Send Image to Twitpic from Android