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ESP32WebServerTest

hms11
Nov 29th, 2023
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  1. /*********
  2. Rui Santos
  3. Complete project details at https://randomnerdtutorials.com
  4. *********/
  5.  
  6. // Load Wi-Fi library
  7. #include <WiFi.h>
  8.  
  9. // Replace with your network credentials
  10. const char* ssid = "1243FryStarlink";
  11. const char* password = "Speedway*1";
  12.  
  13. // Set web server port number to 80
  14. WiFiServer server(80);
  15.  
  16. // Variable to store the HTTP request
  17. String header;
  18.  
  19. // Auxiliar variables to store the current output state
  20. String output18State = "off";
  21. String output17State = "off";
  22.  
  23. // Assign output variables to GPIO pins
  24. const int output18 = 18;
  25. const int output17 = 17;
  26.  
  27. // Current time
  28. unsigned long currentTime = millis();
  29. // Previous time
  30. unsigned long previousTime = 0;
  31. // Define timeout time in milliseconds (example: 2000ms = 2s)
  32. const long timeoutTime = 2000;
  33.  
  34. void setup() {
  35. Serial.begin(115200);
  36. // Initialize the output variables as outputs
  37. pinMode(output18, OUTPUT);
  38. pinMode(output17, OUTPUT);
  39. // Set outputs to LOW
  40. digitalWrite(output18, LOW);
  41. digitalWrite(output17, LOW);
  42.  
  43. // Connect to Wi-Fi network with SSID and password
  44. Serial.print("Connecting to ");
  45. Serial.println(ssid);
  46. WiFi.begin(ssid, password);
  47. while (WiFi.status() != WL_CONNECTED) {
  48. delay(500);
  49. Serial.print(".");
  50. }
  51. // Print local IP address and start web server
  52. Serial.println("");
  53. Serial.println("WiFi connected.");
  54. Serial.println("IP address: ");
  55. Serial.println(WiFi.localIP());
  56. server.begin();
  57. }
  58.  
  59. void loop(){
  60. WiFiClient client = server.available(); // Listen for incoming clients
  61.  
  62. if (client) { // If a new client connects,
  63. currentTime = millis();
  64. previousTime = currentTime;
  65. Serial.println("New Client."); // print a message out in the serial port
  66. String currentLine = ""; // make a String to hold incoming data from the client
  67. while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
  68. currentTime = millis();
  69. if (client.available()) { // if there's bytes to read from the client,
  70. char c = client.read(); // read a byte, then
  71. Serial.write(c); // print it out the serial monitor
  72. header += c;
  73. if (c == '\n') { // if the byte is a newline character
  74. // if the current line is blank, you got two newline characters in a row.
  75. // that's the end of the client HTTP request, so send a response:
  76. if (currentLine.length() == 0) {
  77. // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
  78. // and a content-type so the client knows what's coming, then a blank line:
  79. client.println("HTTP/1.1 200 OK");
  80. client.println("Content-type:text/html");
  81. client.println("Connection: close");
  82. client.println();
  83.  
  84. // turns the GPIOs on and off
  85. if (header.indexOf("GET /18/on") >= 0) {
  86. Serial.println("GPIO 18 on");
  87. output18State = "on";
  88. digitalWrite(output18, HIGH);
  89. } else if (header.indexOf("GET /18/off") >= 0) {
  90. Serial.println("GPIO 18 off");
  91. output18State = "off";
  92. digitalWrite(output18, LOW);
  93. } else if (header.indexOf("GET /17/on") >= 0) {
  94. Serial.println("GPIO 17 on");
  95. output17State = "on";
  96. digitalWrite(output17, HIGH);
  97. } else if (header.indexOf("GET /17/off") >= 0) {
  98. Serial.println("GPIO 17 off");
  99. output17State = "off";
  100. digitalWrite(output17, LOW);
  101. }
  102.  
  103. // Display the HTML web page
  104. client.println("<!DOCTYPE html><html>");
  105. client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
  106. client.println("<link rel=\"icon\" href=\"data:,\">");
  107. // CSS to style the on/off buttons
  108. // Feel free to change the background-color and font-size attributes to fit your preferences
  109. client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
  110. client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
  111. client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
  112. client.println(".button2 {background-color: #555555;}</style></head>");
  113.  
  114. // Web Page Heading
  115. client.println("<body><h1>ESP32 Web Server</h1>");
  116.  
  117. // Display current state, and ON/OFF buttons for GPIO 26
  118. client.println("<p>GPIO 18 - State " + output18State + "</p>");
  119. // If the output26State is off, it displays the ON button
  120. if (output18State=="off") {
  121. client.println("<p><a href=\"/18/on\"><button class=\"button\">ON</button></a></p>");
  122. } else {
  123. client.println("<p><a href=\"/18/off\"><button class=\"button button2\">OFF</button></a></p>");
  124. }
  125.  
  126. // Display current state, and ON/OFF buttons for GPIO 27
  127. client.println("<p>GPIO 17 - State " + output17State + "</p>");
  128. // If the output27State is off, it displays the ON button
  129. if (output17State=="off") {
  130. client.println("<p><a href=\"/17/on\"><button class=\"button\">ON</button></a></p>");
  131. } else {
  132. client.println("<p><a href=\"/17/off\"><button class=\"button button2\">OFF</button></a></p>");
  133. }
  134. client.println("</body></html>");
  135.  
  136. // The HTTP response ends with another blank line
  137. client.println();
  138. // Break out of the while loop
  139. break;
  140. } else { // if you got a newline, then clear currentLine
  141. currentLine = "";
  142. }
  143. } else if (c != '\r') { // if you got anything else but a carriage return character,
  144. currentLine += c; // add it to the end of the currentLine
  145. }
  146. }
  147. }
  148. // Clear the header variable
  149. header = "";
  150. // Close the connection
  151. client.stop();
  152. Serial.println("Client disconnected.");
  153. Serial.println("");
  154. }
  155. }
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