IoT: Our First Application

Introduction

Third introductory article on the 'Internet of Things', written in collaboration with Piero Sbressa. After the installation of Windows 10, IoT Core found at this link, Now we will try to create an application in order to blink an LED, but stated that normally turn on or flashing an LED is not considered IoT, but in this case, serves to give an introduction and an idea of how to develop future applications or prototypes Raspberry Pi2 with Visual Studio 2015. Electronic circuit The material that we need can be found in the following image:

The final connection you see in the following picture: Below is the diagram of the electronic circuit. It states that to create a circuit or draw, are necessary for my personal experience, as well as a dedicated software and hardware parts of the bases on the basics of electronics, otherwise my advice and devote themselves to the development of the code and leave to others the task earlier. From the previous image, we note that we have two cables, one black, and one red. The black cable representing zero volt connect me to pin GPIO5 corresponding to the pin 29 that are on the GPIO card Raspberry Pi2. The red wire on pin 3.3V PWR corresponding to pin 1. Below the connector pin GPIO thus facilitate us to connect. Importantly, the Led diode to work, must be properly connected, ie the katodo (because it recognizes and the shorter leg) must be connected to zero volts, the anode that is the other leg on the positive, which in this case It will be given by pin 3.3V PWR. Wrong wiring will not allow the diode LED work, you may damage the component. The resistance is important because generally, a Led diode operates at a voltage of about 3.3V dc, in this case, it means that there is a voltage drop necessary and thus provide the correct voltage. Setting up your PC in developer mode Before starting to develop code, you must set the mode "developer" of our PC, otherwise, it will not be possible to develop and test their applications. The procedure is very simple. We point the mouse on the icon of the notifications as shown. In the next dialog box, select "All Settings". We will be led to the next screen, select the command "Update and security." We go to the next screen select the "For developers," and soon after Developer mode. A dialog box will appear, where we have to confirm with "Yes" key to activate this mode. Let's confirmation and we have enabled our PC development. Now we are ready to create our first project IoT. Creating the project Before starting with the development, we have yet to download and install the Windows library IoT Core Project Templates found at this link. In this library, you will find everything you need for the development of Raspberry Pi2 and beyond, we will see later in the article. Now open Visual Studio, and create a new project Universal Windows App, in C#. We need at this point to add a Reference to the 'Windows SDK IoT extension for the UWP, as shown below. Now let's add in the Grid Xaml the following code: