Arduino/iot_esp8266_cloud_webserver/iot_esp8266_cloud_webserver.ino

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <SimpleTimer.h>

MDNSResponder mdns;

// Replace with your network credentials

const char* ssid     = "hazard18";
const char* password = "pu1f0xylu1";
// Host
const char* host = "dweet.io";
SimpleTimer timer;

ESP8266WebServer server(80);

// Pin
#define LIGHTSENSOR A0

String webPage = "";

int gpio2_pin = 2;
boolean done = false;

void setup(void){
  webPage += "<h1>ESP8266 Web Server</h1><p>Socket #1 <a href=\"socket1On\"><button>ON</button></a>&nbsp;<a href=\"socket1Off\"><button>OFF</button></a></p>";
  webPage += "<p>Socket #2 <a href=\"socket2On\"><button>ON</button></a>&nbsp;<a href=\"socket2Off\"><button>OFF</button></a></p>";


  // prepare timer
  timer.setInterval(5000, reportLightIntensity);
  

  
  
  Serial.begin(115200);
  delay(100);
  
  WiFi.begin(ssid, password);
  Serial.println("Connecting...");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  
  if (mdns.begin("esp8266", WiFi.localIP())) {
    Serial.println("MDNS responder started");
  }


  // preparing GPIOs
  pinMode(gpio2_pin, OUTPUT);
  digitalWrite(gpio2_pin, LOW);

  delay(1000);
  server.on("/", [](){
    server.send(200, "text/html", webPage);
  });

  server.on("/socket2On", [](){
    server.send(200, "text/html", webPage);
    digitalWrite(gpio2_pin, HIGH);
    delay(1000);
  });
  server.on("/socket2Off", [](){
    server.send(200, "text/html", webPage);
    digitalWrite(gpio2_pin, LOW);
    delay(1000); 
  });
  server.begin();
  Serial.println("HTTP server started");
}




void reportLightIntensity(){
  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    return;
  }
  int h = (unsigned int) analogRead(LIGHTSENSOR);
  Serial.println("a0 val: " + String(h));
  
  // This will send the request to the server
  client.print(String("GET /dweet/for/esp1881?light_intensity=") + String(h) + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");
  delay(10);
  
  // Read all the lines of the reply from server and print them to Serial
  while(client.available()){
    String line = client.readStringUntil('\r');
    Serial.print(line);
  }
  
  Serial.println();
  Serial.println("closing connection");
    
}
 
void loop(void){
  
  server.handleClient();
  timer.run();
}