RuiViana

Learn HTML

Dec 15th, 2015
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  1. /*
  2. Web Server
  3.  
  4. A simple web server that shows the value of the analog input pins.
  5. using an Arduino Wiznet Ethernet shield.
  6.  
  7. Circuit:
  8. * Ethernet shield attached to pins 10, 11, 12, 13
  9. * Analog inputs attached to pins A0 through A5 (optional)
  10.  
  11. created 18 Dec 2009
  12. by David A. Mellis
  13. modified 9 Apr 2012
  14. by Tom Igoe
  15. modified 02 Sept 2015
  16. by Arturo Guadalupi
  17.  
  18. */
  19.  
  20. #include <SPI.h>
  21. #include <Ethernet.h>
  22.  
  23. // Enter a MAC address and IP address for your controller below.
  24. // The IP address will be dependent on your local network:
  25. byte mac[] = {
  26. 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
  27. };
  28. IPAddress ip(192, 168, 0, 177);
  29.  
  30. // Initialize the Ethernet server library
  31. // with the IP address and port you want to use
  32. // (port 80 is default for HTTP):
  33. EthernetServer server(80);
  34.  
  35. void setup() {
  36. // Open serial communications and wait for port to open:
  37. Serial.begin(9600);
  38. while (!Serial) {
  39. ; // wait for serial port to connect. Needed for native USB port only
  40. }
  41.  
  42.  
  43. // start the Ethernet connection and the server:
  44. Ethernet.begin(mac, ip);
  45. server.begin();
  46. Serial.print("server is at ");
  47. Serial.println(Ethernet.localIP());
  48. }
  49.  
  50.  
  51. void loop() {
  52. // listen for incoming clients
  53. EthernetClient client = server.available();
  54. if (client) {
  55. Serial.println("new client");
  56. // an http request ends with a blank line
  57. boolean currentLineIsBlank = true;
  58. while (client.connected()) {
  59. if (client.available()) {
  60. char c = client.read();
  61. Serial.write(c);
  62. // if you've gotten to the end of the line (received a newline
  63. // character) and the line is blank, the http request has ended,
  64. // so you can send a reply
  65. if (c == '\n' && currentLineIsBlank) {
  66. // send a standard http response header
  67. client.println("HTTP/1.1 200 OK");
  68. client.println("Content-Type: text/html");
  69. client.println("Connection: close"); // the connection will be closed after completion of the response
  70. client.println("Refresh: 2"); // refresh the page automatically every 2 sec
  71. client.println();
  72. client.println("<!DOCTYPE HTML>");
  73. client.println("<html>");
  74. // output the value of each analog input pin
  75. for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
  76. int sensorReading = analogRead(analogChannel);
  77. client.print("analog input ");
  78. client.print(analogChannel);
  79. client.print(" is ");
  80. client.print(sensorReading);
  81. client.println("<br />");
  82. }
  83. client.println("</html>");
  84. break;
  85. }
  86. if (c == '\n') {
  87. // you're starting a new line
  88. currentLineIsBlank = true;
  89. } else if (c != '\r') {
  90. // you've gotten a character on the current line
  91. currentLineIsBlank = false;
  92. }
  93. }
  94. }
  95. // give the web browser time to receive the data
  96. delay(1);
  97. // close the connection:
  98. client.stop();
  99. Serial.println("client disconnected");
  100. Ethernet.maintain();
  101. }
  102. }
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