CRTC Electronics

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ESP as Server (router required)

instrutions

  • add declarations to the top of your sketch
  • write " webSetup() " in setup()
  • write " webpage() " in loop() 

declarations

#include <ESP8266WiFi.h>

const char* ssid = "CJSD_Student";
const char* password = "here2learn";
WiFiServer server(80);


int state = 1;  //light STATE (0=off, 1=on)

webSetup()



void webSetup() {
  Serial.begin(115200);
  delay(10);
  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  // Start the server
  server.begin();
  Serial.println("Server started");
  // Print the IP address
  Serial.print("Use this URL to connect: ");
  Serial.print("http://");
  Serial.print(WiFi.localIP());
  Serial.println("/");
}

webpage()


void webpage() {
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  // Wait until the client sends some data
  Serial.println("new client");
  while(!client.available()){
    delay(1);
  }
  // Read the first line of the request
  String request = client.readStringUntil('\r');
  Serial.println(request);
  client.flush();
  // Match the request
  int value = 0;
  if (request.indexOf("/LED=ON") != -1)  {
    state = 1;
    value = 1;
  }
  if (request.indexOf("/LED=OFF") != -1)  {
    state = 0;
    value = LOW;
  }
 
// Set ledPin according to the request
//digitalWrite(ledPin, value);
  // Return the response
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.print("Led pin is now: ");
  if(value == 1) {
    client.print("On");
  } else if (value == 0) {
    client.print("Off");
  }
  client.println("<br><br>");
  client.println("<a href=\"/LED=ON\"\"><button>Turn On </button></a>");
  client.println("<a href=\"/LED=OFF\"\"><button>Turn Off </button></a><br />");  
  
  client.println("</html>");
  delay(1);
  Serial.println("Client disonnected");
  Serial.println("");
}