huggre/let_there_be_light_wifi.ino

## let_there_be_light_wifi.ino
/*
 *  This sketch demonstrates how to set up a simple HTTP-like server.
 *  The server will set a GPIO pin depending on the request
 *    http://server_ip/gpio/0 will set the GPIO2 low,
 *    http://server_ip/gpio/1 will set the GPIO2 high
 *  server_ip is the IP address of the ESP8266 Arduino module, will be
 *  printed to Serial when the module is connected.
 */

// Include the ESP8266 library
#include <ESP8266WiFi.h>

// Specify your WiFi ssid and password
const char* ssid = "write your wifi ssid here";
const char* password = "write your wifi password here";

// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);

// Define relay PIN
int ledPin = D2;

void setup() {
  Serial.begin(115200);
  delay(10);

  // Setup relay PIN
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);

  // 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.println(WiFi.localIP());
}

void loop() {
  // 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 req = client.readStringUntil('\r');
  Serial.println(req);
  client.flush();

  // Match the request
  bool val;
  if (req.indexOf("/gpio/0") != -1)
    val = LOW;
  else if (req.indexOf("/gpio/1") != -1)
    val = HIGH;
  else {
    Serial.println("invalid request");
    client.stop();
    return;
  }

  // Set GPIO2 according to the request
  digitalWrite(ledPin, val);

  client.flush();

  // Prepare the response
  String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";
  s += (val)?"high":"low";
  s += "</html>\n";

  // Send the response to the client
  client.print(s);
  delay(1);
  Serial.println("Client disonnected");

  // The client will actually be disconnected
  // when the function returns and 'client' object is detroyed
}
	/*
	* This sketch demonstrates how to set up a simple HTTP-like server.
	* The server will set a GPIO pin depending on the request
	* http://server_ip/gpio/0 will set the GPIO2 low,
	* http://server_ip/gpio/1 will set the GPIO2 high
	* server_ip is the IP address of the ESP8266 Arduino module, will be
	* printed to Serial when the module is connected.
	*/

	// Include the ESP8266 library
	#include <ESP8266WiFi.h>

	// Specify your WiFi ssid and password
	const char* ssid = "write your wifi ssid here";
	const char* password = "write your wifi password here";

	// Create an instance of the server
	// specify the port to listen on as an argument
	WiFiServer server(80);

	// Define relay PIN
	int ledPin = D2;

	void setup() {
	Serial.begin(115200);
	delay(10);

	// Setup relay PIN
	pinMode(ledPin, OUTPUT);
	digitalWrite(ledPin, LOW);

	// 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.println(WiFi.localIP());
	}

	void loop() {
	// 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 req = client.readStringUntil('\r');
	Serial.println(req);
	client.flush();

	// Match the request
	bool val;
	if (req.indexOf("/gpio/0") != -1)
	val = LOW;
	else if (req.indexOf("/gpio/1") != -1)
	val = HIGH;
	else {
	Serial.println("invalid request");
	client.stop();
	return;
	}

	// Set GPIO2 according to the request
	digitalWrite(ledPin, val);

	client.flush();

	// Prepare the response
	String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";
	s += (val)?"high":"low";
	s += "</html>\n";

	// Send the response to the client
	client.print(s);
	delay(1);
	Serial.println("Client disonnected");

	// The client will actually be disconnected
	// when the function returns and 'client' object is detroyed
	}