Several development articles.
The Microchip RN2483 and the RN2903 are Low-Power Long Range LoRa® Technology Transceiver Modules, in the same package and Pin compatible. The RN2483 is intended for the 433 MHz and 868 MHz Frequency Bands (Europe), while the RN2903 is for the 915 MHz Frequency Band (US, Taiwan). I used the RN2483 in my first LoRaWAN project, some time ago. While LoRaWAN technologies have seen an impressive recent boost and Microchip’s…
The morse code encodes the latin alphabet comprised of 26 letters to a binary base. Traditionally, the destination set used dots and dashes, making the encoded letters easy to transmit as signals both over radio and wire. But any binary set of symbols can be used instead. For other languages with more than 26 characters, or for special characters, there is an extended set of morse binary combinations something we…
OpenLayers is an opensource javascript library for rich web-based geographic applications. I recently had to represent temperature readings on a map. The first idea was to use heatmaps, due to their nice blur and colour gradient effects. There is native support for heatmaps in OpenLayers 3: Demo code on JSFiddle. function initHeatmap(src) { return vector = new ol.layer.Heatmap({ source: src, blur: 2, radius: 8, weight: function(srcObject) { return parseFloat(getDoseRate(srcObject.get(‘averagecpm’), srcObject.get(‘factor’)))…
Note: there is a newer version of this project, KIT1.1, see it here If I was to give this project a version number, the closest match would be the uRADMonitor model B. Finally an open source compact radiation dosimeter, that has an LCD and thus allows mobile use, but also comes with an Ethernet adapter so it can do radiation monitoring (uRADMonitor compatible). Yet, this is not quite the uRADMonitor…
Installing GIT from Virtualmin is easy. You just need to go to Edit Server->Enabled features->Allow Git Repositories Create a repo by going to Services->Git repositories: Then go to Edit Users->select a user->Other user permissions and grant them access to your new repo: You are now ready to add your local code to the new repo: cd ~/firmware git –bare init echo hello > hello.txt git add hello.txt git commit -m…
An open source android library project implementing a versatile audio player that supports the most used audio formats Mp3, AAC, Vorbis, WMA and more.
Some impressions on the Google Tango Hackathon held in Timisoara in April 2014. See one of the Winner projects, the Camera 3D and some insight on the new device from Google.
Infused™ is about passion for design, music, digital, programming and alternative culture in Timisoara, Romania. Structured as a set of interviews with people involved in the act of creation regardless of its final form, the first video covered Flat UI & Minimalism, featuring Madalin Gageanu and Adonis Raduca: I was excited to get an invitation to participate to the second episode. This time the subject was focused on Android software…
As an IT specialist, I’ve been invited to a TV Show where I had the chance to discuss a few details on Internet and computer usage safety best Practices, a covering a little on security topics: The discussion is in Romanian.
A tutorial on how to add Drag and Drop functionality to a gridview control.
Build a custom gridview control for Android, programmatically.
Applications released as unlockable trial versions are vulnerable. Learn how to protect your work by embedding bulletproof security techniques.
A custom control for Android that can be used to adjust the volume and to toggle between on/off state at the same time.
If you’ve used Leptonica, you probably know it’s a great library, but when you want to use it to replicate Photoshop like effects, you will quickly get to want more than what the library provides by default. Take the pixGammaTRC primitive as an example: If you want to modify the lightness of your image, (making it brighter or darken it), or even a simple contrast this might work good enough….
Increasing the saturation in an image is equivalent to increasing the “amount of color”, while a completely desaturated image would be a grayscale image. See the images below: Normal Saturated Desaturated Grayscale Logic and Implementation Algorithm The images are composed of pixels. For a RGB24 image, each pixel is a set of 3 bytes, 1 for each of the three color channels: red, green, blue. 1 byte (or 8 bits)…
Build, compile, sign and deploy applications for the Blackberry Z10, using only the command line tools.
A step by step guide on how to generate RSA keys and then use them to establish a SSH connection to a remote Blackberry Z10 device.
EDIT: there is a dedicated blog on this project, here. Make sure to follow it for latest news. A few days ago I announced my intention of creating my first crowd-funded project, but I didn’t tell you what was it about. Well, I’m planning quite a challenging project – to bring my uRADMonitor to a global scale, and create a network of distributed detectors, with data centralized on one server,…
While working with Leptonica I had the unpleasant surprise to notice that the saturation function pixModifySaturation was not really working properly (or at least not entirely as expected). First I didn’t even know what was wrong, I just felt it didn’t look right, then I saw that by transforming the saturation in Leptonica with pixModifySaturation , the contrast would be partially lost. Debugging the issue, and using different photos for…
Showing how to create a cartoon effect using the image processing library Leptonica
Create a beautiful custom 3D carousel view, to give your Android user interfaces a modern look. Sample code included under GPL v2.
Learn how to create a simple tiled background for Android applications using Java code.
A short insight on how to get started with developing for the new Blackberry 10, using dynamically created controls.
Learn how to scale an user interface to maintain the same aspect ratio, while running the same code on various Android devices.
You can use your smartphone (android/iphone) to control electrical equipment inside your home. See how.
This page has been created to report unusual activity (radiation, temperature, humidity, luminosity, barometric pressure), as recorded by the uRADMonitor, including all the debug data to support the results. I cannot guarantee the measurement precision, I merely present the data recorded by the instruments.
A JNI Library for Android, to inject keys and touches but also listen for incoming input events to and from all applications, available as Open Source under GPL.
I’ve developed the uRADMonitor as an Environmental Radiation Surveillance automated monitoring device. Data is gathered in real time, 24/7, and is exported via the Internet to a database online. The data is available in customizable charts for analysis.
Learn how to create a mouse cursor in Android OS programatically, using Overlay Views.
