brennancheung/ESP8266_led_server.ino

## ESP8266_led_server.ino
#include <ESP8266WiFi.h>

const char* ssid = "ssid";
const char* password = "password";

WiFiServer server(80);

String header;

int gpio_pins [] = { D0, D1, D2 };
int pin_states [] = { HIGH, HIGH, HIGH };

WiFiClient client;

void setPin(int pin, int state) {
  Serial.print("Setting pin ");
  Serial.print(pin);
  Serial.print(" to ");
  Serial.print(state == HIGH ? "off" : "on");
  Serial.println("");
  digitalWrite(gpio_pins[pin], state);
  pin_states[pin] = state;
}

void pinControl(int pin) {
  int state = pin_states[pin];
  String colors [] = { "red", "green", "blue" };
  String stateStr = state == HIGH ? "ON" : "OFF";
  String toggleStr = state == HIGH ? "off" : "on";
  String str = String("") +
    "<p>" + colors[pin] + "</p>" +
    "<p><a href=\"/" + pin + "/" + toggleStr + "\"><button class=\"button\">" + stateStr + "</button></a></p>";
  if (client) { client.println(str); }
}

void setup() {
  Serial.begin(115200);
  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");
  Serial.println("IP address:");
  Serial.println(WiFi.localIP());
  server.begin();

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(D0, OUTPUT);
  pinMode(D1, OUTPUT);
  pinMode(D2, OUTPUT);
  pinMode(D3, OUTPUT);
  pinMode(D4, OUTPUT);

  setPin(0, HIGH);
  setPin(1, HIGH);
  setPin(2, HIGH);
}

// the loop function runs over and over again forever

void loop(){
  client = server.available();   // Listen for incoming clients

  if (!client) { return; }

  Serial.println("New Client.");          // print a message out in the serial port
  String currentLine = "";                // make a String to hold incoming data from the client
  while (client.connected()) {            // loop while the client's connected
    if (client.available()) {             // if there's bytes to read from the client,
      char c = client.read();             // read a byte, then
      Serial.write(c);                    // print it out the serial monitor
      header += c;
      if (c == '\n') {                    // if the byte is a newline character
        // if the current line is blank, you got two newline characters in a row.
        // that's the end of the client HTTP request, so send a response:
        if (currentLine.length() == 0) {
          // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
          // and a content-type so the client knows what's coming, then a blank line:
          client.println("HTTP/1.1 200 OK");
          client.println("Content-type:text/html");
          client.println("Connection: close");
          client.println();

          // turns the GPIOs on and off
          if (header.indexOf("GET /0/on") >= 0) { setPin(0, HIGH); }
          if (header.indexOf("GET /0/off") >= 0) { setPin(0, LOW); }
          if (header.indexOf("GET /1/on") >= 0) { setPin(1, HIGH); }
          if (header.indexOf("GET /1/off") >= 0) { setPin(1, LOW); }
          if (header.indexOf("GET /2/on") >= 0) { setPin(2, HIGH); }
          if (header.indexOf("GET /2/off") >= 0) { setPin(2, LOW); }

          // Display the HTML web page
          client.println("<!DOCTYPE html><html>");
          client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
          client.println("<link rel=\"icon\" href=\"data:,\">");
          // CSS to style the on/off buttons
          // Feel free to change the background-color and font-size attributes to fit your preferences
          client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
          client.println(".button { background-color: #195B6A; border: none; color: white; padding: 16px 40px;");
          client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
          client.println(".button2 {background-color: #77878A;}</style></head>");

          // Web Page Heading
          client.println("<body><h1>RGB LED Strip Control</h1>");

          pinControl(0);
          pinControl(1);
          pinControl(2);

          client.println("</body></html>");

          // The HTTP response ends with another blank line
          client.println();
          // Break out of the while loop
          break;
        } else { // if you got a newline, then clear currentLine
          currentLine = "";
        }
      } else if (c != '\r') {  // if you got anything else but a carriage return character,
        currentLine += c;      // add it to the end of the currentLine
      }
    }
  }
  // Clear the header variable
  header = "";
  // Close the connection
  client.stop();
  Serial.println("Client disconnected.");
  Serial.println("");
}
	#include <ESP8266WiFi.h>

	const char* ssid = "ssid";
	const char* password = "password";

	WiFiServer server(80);

	String header;

	int gpio_pins [] = { D0, D1, D2 };
	int pin_states [] = { HIGH, HIGH, HIGH };

	WiFiClient client;

	void setPin(int pin, int state) {
	Serial.print("Setting pin ");
	Serial.print(pin);
	Serial.print(" to ");
	Serial.print(state == HIGH ? "off" : "on");
	Serial.println("");
	digitalWrite(gpio_pins[pin], state);
	pin_states[pin] = state;
	}

	void pinControl(int pin) {
	int state = pin_states[pin];
	String colors [] = { "red", "green", "blue" };
	String stateStr = state == HIGH ? "ON" : "OFF";
	String toggleStr = state == HIGH ? "off" : "on";
	String str = String("") +
	"<p>" + colors[pin] + "</p>" +
	"<p><a href=\"/" + pin + "/" + toggleStr + "\"><button class=\"button\">" + stateStr + "</button></a></p>";
	if (client) { client.println(str); }
	}

	void setup() {
	Serial.begin(115200);
	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");
	Serial.println("IP address:");
	Serial.println(WiFi.localIP());
	server.begin();

	// initialize digital pin LED_BUILTIN as an output.
	pinMode(LED_BUILTIN, OUTPUT);
	pinMode(D0, OUTPUT);
	pinMode(D1, OUTPUT);
	pinMode(D2, OUTPUT);
	pinMode(D3, OUTPUT);
	pinMode(D4, OUTPUT);

	setPin(0, HIGH);
	setPin(1, HIGH);
	setPin(2, HIGH);
	}

	// the loop function runs over and over again forever

	void loop(){
	client = server.available(); // Listen for incoming clients

	if (!client) { return; }

	Serial.println("New Client."); // print a message out in the serial port
	String currentLine = ""; // make a String to hold incoming data from the client
	while (client.connected()) { // loop while the client's connected
	if (client.available()) { // if there's bytes to read from the client,
	char c = client.read(); // read a byte, then
	Serial.write(c); // print it out the serial monitor
	header += c;
	if (c == '\n') { // if the byte is a newline character
	// if the current line is blank, you got two newline characters in a row.
	// that's the end of the client HTTP request, so send a response:
	if (currentLine.length() == 0) {
	// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
	// and a content-type so the client knows what's coming, then a blank line:
	client.println("HTTP/1.1 200 OK");
	client.println("Content-type:text/html");
	client.println("Connection: close");
	client.println();

	// turns the GPIOs on and off
	if (header.indexOf("GET /0/on") >= 0) { setPin(0, HIGH); }
	if (header.indexOf("GET /0/off") >= 0) { setPin(0, LOW); }
	if (header.indexOf("GET /1/on") >= 0) { setPin(1, HIGH); }
	if (header.indexOf("GET /1/off") >= 0) { setPin(1, LOW); }
	if (header.indexOf("GET /2/on") >= 0) { setPin(2, HIGH); }
	if (header.indexOf("GET /2/off") >= 0) { setPin(2, LOW); }

	// Display the HTML web page
	client.println("<!DOCTYPE html><html>");
	client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
	client.println("<link rel=\"icon\" href=\"data:,\">");
	// CSS to style the on/off buttons
	// Feel free to change the background-color and font-size attributes to fit your preferences
	client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
	client.println(".button { background-color: #195B6A; border: none; color: white; padding: 16px 40px;");
	client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
	client.println(".button2 {background-color: #77878A;}</style></head>");

	// Web Page Heading
	client.println("<body><h1>RGB LED Strip Control</h1>");

	pinControl(0);
	pinControl(1);
	pinControl(2);

	client.println("</body></html>");

	// The HTTP response ends with another blank line
	client.println();
	// Break out of the while loop
	break;
	} else { // if you got a newline, then clear currentLine
	currentLine = "";
	}
	} else if (c != '\r') { // if you got anything else but a carriage return character,
	currentLine += c; // add it to the end of the currentLine
	}
	}
	}
	// Clear the header variable
	header = "";
	// Close the connection
	client.stop();
	Serial.println("Client disconnected.");
	Serial.println("");
	}