With this small tutorial, I’m going to show you how to read the position of a 3-way switch using just one Arduino’s analog PIN. A 3-way switch (sometimes called ON-OFF-ON or SPTT) has 3 PINs: the common (on the center) and the two outputs. When the lever is up or down, the common PIN is connected to one of…
Last week, while I was on holiday in Menorca, the provider that hosts my website decided to update both Apache and PHP… the result has obviously been a disaster! 😉 I’ve completed the restore of the entire website… I hope now everything is ok!
Thanks to Jun Chun, my tutorial about developing Android applications with Bluetooth functionalities has been translated in korean. The five articles are available in two blog posts on Jon’s website, ArsViator: http://arsviator.blogspot.kr/2014/06/bluetooth-programming-in-android-12.html http://arsviator.blogspot.kr/2014/06/bluetooth-programming-in-android-22.html
Today I found a strange problem in a VMWare infrastructure I manage: the connection to the V irtualCenter Server was unstable using both the desktop client and the new webclient. When I connected to the server that runs the VMware VirtualCenter Server service, I noticed that the service kept restarting. In the Windows’ System event…
My latest project is a led matrix display, portable and controlled via Bluetooth from a PC or from an Android smartphone; I named it BlueMatrix. Here’s a short presentation video (non-italian guests: remember to enable english subtitles); in the next pages you’ll find some details about how it was made and how it works:
If you tested the application I wrote for the previous tutorial, you could have noticed a small problem: while the connection is established and the “Hello World!” message is sent, the GUI of the application does not respond. The reason is simple: most of the methods used are blocking, i.e. they stop the execution of…
In this tutorial, you’ll learn at last how to connect to a Bluetooth device and how to send data to it… Profiles and UUID The Bluetooth standard defines some profiles, i.e. functionalities that Bluetooth devices offer. To simplify, Bluetooth profiles correspond to “what” a device can do; for example, a Bluetooth headset implements for sure the HSP (Headset Service Profile)…
Here’s a new post in my course about developing Android apps with Bluetooth functionalities. In this tutorial I’m going to show you how to detect a state change of the Bluetooth module. Android is a multitasking operating system: while our application is running, the user or a different application may change the state of the Bluetooth module,…
The guys at Arduino have just released an updated image for the Linux distribution running on the Arduino Yun. The image is available in the software page on the Arduino’s official website: To perform the update, you can follow the official guide or a previous post on my blog. The new features and the bug fixes have been summarized…
In my previous tutorial, you learned the most important objects to manage the bluetooth module of an Android smartphone and I showed how to list the phone’s paired devices. Today you’ll learn how to ask Android to search for new devices…