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117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
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WiFi Web Server LED Blink
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A simple web server that lets you blink an LED via the web.
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This sketch will print the IP address of your WiFi Shield (once connected)
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to the Serial monitor. From there, you can open that address in a web browser
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to turn on and off the LED on pin 5.
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If the IP address of your shield is yourAddress:
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http://yourAddress/H turns the LED on
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http://yourAddress/L turns it off
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This example is written for a network using WPA encryption. For
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WEP or WPA, change the Wifi.begin() call accordingly.
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Circuit:
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* WiFi shield attached
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* LED attached to pin 5
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created for arduino 25 Nov 2012
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by Tom Igoe
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ported for sparkfun esp32
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31.01.2017 by Jan Hendrik Berlin
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*/
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#include <WiFi.h>
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const char* ssid = "yourssid";
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const char* password = "yourpasswd";
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WiFiServer server(80);
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void setup()
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{
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Serial.begin(115200);
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pinMode(5, OUTPUT); // set the LED pin mode
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delay(10);
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// We start by connecting to a WiFi network
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Serial.println();
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected.");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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server.begin();
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}
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int value = 0;
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void loop(){
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WiFiClient client = server.available(); // listen for incoming clients
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if (client) { // if you get a client,
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Serial.println("New Client."); // print a message out the serial port
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String currentLine = ""; // make a String to hold incoming data from the client
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while (client.connected()) { // loop while the client's connected
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if (client.available()) { // if there's bytes to read from the client,
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char c = client.read(); // read a byte, then
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Serial.write(c); // print it out the serial monitor
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if (c == '\n') { // if the byte is a newline character
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// if the current line is blank, you got two newline characters in a row.
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// that's the end of the client HTTP request, so send a response:
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if (currentLine.length() == 0) {
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// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
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// and a content-type so the client knows what's coming, then a blank line:
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client.println("HTTP/1.1 200 OK");
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client.println("Content-type:text/html");
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client.println();
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// the content of the HTTP response follows the header:
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client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 5 on.<br>");
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client.print("Click <a href=\"/L\">here</a> to turn the LED on pin 5 off.<br>");
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// The HTTP response ends with another blank line:
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client.println();
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// break out of the while loop:
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break;
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} else { // if you got a newline, then clear currentLine:
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currentLine = "";
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}
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} else if (c != '\r') { // if you got anything else but a carriage return character,
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currentLine += c; // add it to the end of the currentLine
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}
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// Check to see if the client request was "GET /H" or "GET /L":
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if (currentLine.endsWith("GET /H")) {
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digitalWrite(5, HIGH); // GET /H turns the LED on
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}
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if (currentLine.endsWith("GET /L")) {
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digitalWrite(5, LOW); // GET /L turns the LED off
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}
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}
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}
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// close the connection:
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client.stop();
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Serial.println("Client Disconnected.");
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}
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}
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