web server con netduino

Netduino-Plus como webserver interactuando con dispositivos

soloelectronicos2 comentarios

Hay muchas maneras de controlar la puerta del garaje con su Netduino. En este caso se   modificara un mando de apertura de puerta de garaje  por medio de un OPTOISOLATOR   y este a su vez se conectara a nuestro netduino por medio de uan resistencia en serie. Para enviar comandos a la placa de  Netduino se utilizaran simples  comandos HTTP.

Componentes necesarios para el montaje

  • Abrir puertas de garajes
  • OPTOISOLATOR con el controlador de Darlington – 1 canal.
  • Resistencia de 100 ohmios
  • 33 ohmios resistencia
  • Netduino  Plus

El esquema para la conexión del netudiono  con el abridor de la puerta del garaje es bastante sencillo:

  • Conecte el pin OPTOISOLATOR 1 (ánodo) al pin digital plus Netduino 13
  • Conecte el pin OPTOISOLATOR 2 (cátodo) a un pin de tierra en el signo más Netduino con una resistencia de 33 ohmios en línea.
  • Conectar el pasador optoaislador 3 (emisor) a un lado de la puerta de garaje pulsador con una resistencia de 100 ohmios en línea.
  • Conectar el pasador optoaislador 4 (colector) al otro lado de la puerta garge abridor pulsador.

Código

public class WebServer : IDisposable
02     {
03         private Socket socket = null;
04         //open connection to onbaord led so we can blink it with every request
05         private OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);
06         private OutputPort Garage2CarOpener = new OutputPort(Pins.GPIO_PIN_D13,false);
07
08         public WebServer()
09         {
10             //Initialize Socket class
11             socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
12             //Request and bind to an IP from DHCP server
13             socket.Bind(new IPEndPoint(IPAddress.Any, 80));
14             //Debug print our IP address
15             Debug.Print(Microsoft.SPOT.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()[0].IPAddress);
16             //Start listen for web requests
17             socket.Listen(10);
18             ListenForRequest();
19         }
20
21         public void ListenForRequest()
22         {
23             while (true)
24             {
25                 using (Socket clientSocket = socket.Accept())
26                 {
27                     //Get clients IP
28                     IPEndPoint clientIP = clientSocket.RemoteEndPoint as IPEndPoint;
29                     EndPoint clientEndPoint = clientSocket.RemoteEndPoint;
30                     //int byteCount = cSocket.Available;
31                     int bytesReceived = clientSocket.Available;
32                     if (bytesReceived > 0)
33                     {
34                         //Get request
35                         byte[] buffer = new byte[bytesReceived];
36                         int byteCount = clientSocket.Receive(buffer, bytesReceived, SocketFlags.None);
37                         string request = new string(Encoding.UTF8.GetChars(buffer));
38                         string firstLine = request.Substring(0, request.IndexOf('\n')); //Example "GET /activatedoor HTTP/1.1"
39                         string[] words = firstLine.Split(' ');  //Split line into words
40                         string command = string.Empty;
41                         if( words.Length > 2)
42                         {
43                             string method = words[0]; //First word should be GET
44                             command = words[1].TrimStart('/'); //Second word is our command - remove the forward slash
45                         }
46                         switch (command.ToLower())
47                         {
48                             case "activatedoor":
49                                 ActivateGarageDoor();
50                                 //Compose a response
51                                 string response = "I just opened or closed the garage!";
52                                 string header = "HTTP/1.0 200 OK\r\nContent-Type: text; charset=utf-8\r\nContent-Length: " + response.Length.ToString() +"\r\nConnection: close\r\n\r\n";
53                                 clientSocket.Send(Encoding.UTF8.GetBytes(header), header.Length, SocketFlags.None);
54                                 clientSocket.Send(Encoding.UTF8.GetBytes(response), response.Length, SocketFlags.None);
55                                 break;
56                             default:
57                                 //Did not recognize command
58                                 response = "Bad command";
59                                 header = "HTTP/1.0 200 OK\r\nContent-Type: text; charset=utf-8\r\nContent-Length: " + response.Length.ToString() + "\r\nConnection: close\r\n\r\n";
60                                 clientSocket.Send(Encoding.UTF8.GetBytes(header), header.Length, SocketFlags.None);
61                                 clientSocket.Send(Encoding.UTF8.GetBytes(response), response.Length, SocketFlags.None);
62                                 break;
63                         }
64                     }
65                 }
66             }
67         }
68         private void ActivateGarageDoor()
69         {
70             led.Write(true);                //Light on-board LED for visual cue
71             Garage2CarOpener.Write(true);   //"Push" garage door button
72             Thread.Sleep(1000);             //For 1 second
73             led.Write(false);               //Turn off on-board LED
74             Garage2CarOpener.Write(false);  //Turn off garage door button
75         }
76         #region IDisposable Members
77         ~WebServer()
78         {
79             Dispose();
80         }
81         public void Dispose()
82         {
83             if (socket != null)
84                 socket.Close();
85         }
86         #endregion
87     }
Anuncio publicitario