143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
/*
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WiFiEsp example: WebServerLed
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A simple web server that lets you turn on and of an LED via a web page.
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This sketch will print the IP address of your ESP8266 module (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 13.
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For more details see: http://yaab-arduino.blogspot.com/p/wifiesp.html
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*/
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#include "WiFiEsp.h"
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// Emulate Serial1 on pins 6/7 if not present
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#ifndef HAVE_HWSERIAL1
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#include "SoftwareSerial.h"
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SoftwareSerial Serial1(6, 7); // RX, TX
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#endif
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char ssid[] = "Twim"; // your network SSID (name)
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char pass[] = "12345678"; // your network password
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int status = WL_IDLE_STATUS;
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int ledStatus = LOW;
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WiFiEspServer server(80);
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// use a ring buffer to increase speed and reduce memory allocation
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RingBuffer buf(8);
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void setup()
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{
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pinMode(LED_BUILTIN, OUTPUT); // initialize digital pin LED_BUILTIN as an output.
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Serial.begin(115200); // initialize serial for debugging
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Serial1.begin(9600); // initialize serial for ESP module
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WiFi.init(&Serial1); // initialize ESP module
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// check for the presence of the shield
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue
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while (true);
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}
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// attempt to connect to WiFi network
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while (status != WL_CONNECTED) {
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Serial.print("Attempting to connect to WPA SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network
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status = WiFi.begin(ssid, pass);
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}
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Serial.println("You're connected to the network");
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printWifiStatus();
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// start the web server on port 80
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server.begin();
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}
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void loop()
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{
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WiFiEspClient 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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buf.init(); // initialize the circular buffer
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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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buf.push(c); // push it to the ring buffer
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// printing the stream to the serial monitor will slow down
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// the receiving of data from the ESP filling the serial buffer
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//Serial.write(c);
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// you got two newline characters in a row
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// that's the end of the HTTP request, so send a response
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if (buf.endsWith("\r\n\r\n")) {
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sendHttpResponse(client);
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break;
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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 (buf.endsWith("GET /H")) {
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Serial.println("Turn led ON");
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ledStatus = HIGH;
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digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
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}
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else if (buf.endsWith("GET /L")) {
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Serial.println("Turn led OFF");
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ledStatus = LOW;
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digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
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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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void sendHttpResponse(WiFiEspClient client)
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{
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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("The LED is ");
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client.print(ledStatus);
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client.println("<br>");
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client.println("<br>");
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client.println("Click <a href=\"/H\">here</a> turn the LED on<br>");
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client.println("Click <a href=\"/L\">here</a> turn the LED off<br>");
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// The HTTP response ends with another blank line:
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client.println();
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}
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void printWifiStatus()
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{
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// print the SSID of the network you're attached to
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your WiFi shield's IP address
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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// print where to go in the browser
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Serial.println();
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Serial.print("To see this page in action, open a browser to http://");
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Serial.println(ip);
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Serial.println();
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}
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