ESPDUINO LOCAL WEBSERVER  με θερμόμετρο-υγρόμετρο

 

// Including the ESP8266 WiFi library

#include <ESP8266WiFi.h>

#include "DHT.h"

 

// Uncomment one of the lines below for whatever DHT sensor type you're using!

#define DHTTYPE DHT11   // DHT 11

//#define DHTTYPE DHT21   // DHT 21 (AM2301)

//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

 

// Replace with your network details

const char* ssid = "yourwifi";

const char* password = "yourpass";

 

// Web Server on port 80

WiFiServer server(80);

 

// DHT Sensor

const int DHTPin = 2;

// Initialize DHT sensor.

DHT dht(DHTPin, DHTTYPE);

 

// Temporary variables

static char celsiusTemp[7];

static char fahrenheitTemp[7];

static char humidityTemp[7];

 

// only runs once on boot

void setup() {

  // Initializing serial port for debugging purposes

  Serial.begin(115200);

  delay(10);

 

  dht.begin();

 

  // Connecting to WiFi network

  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");

 

  // Starting the web server

  server.begin();

  Serial.println("Web server running. Waiting for the ESP IP...");

  delay(10000);

 

  // Printing the ESP IP address

  Serial.println(WiFi.localIP());

}

 

// runs over and over again

void loop() {

  // Listenning for new clients

  WiFiClient client = server.available();

 

  if (client) {

    Serial.println("New client");

    // bolean to locate when the http request ends

    boolean blank_line = true;

    while (client.connected()) {

      if (client.available()) {

        char c = client.read();

       

        if (c == '\n' && blank_line) {

            // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)

            float h = dht.readHumidity();

            // Read temperature as Celsius (the default)

            float t = dht.readTemperature();

            // Read temperature as Fahrenheit (isFahrenheit = true)

            float f = dht.readTemperature(true);

            // Check if any reads failed and exit early (to try again).

            if (isnan(h) || isnan(t) || isnan(f)) {

              Serial.println("Failed to read from DHT sensor!");

              strcpy(celsiusTemp,"Failed");

              strcpy(fahrenheitTemp, "Failed");

              strcpy(humidityTemp, "Failed");        

            }

            else{

              // Computes temperature values in Celsius + Fahrenheit and Humidity

              float hic = dht.computeHeatIndex(t, h, false);      

              dtostrf(hic, 6, 2, celsiusTemp);            

              float hif = dht.computeHeatIndex(f, h);

              dtostrf(hif, 6, 2, fahrenheitTemp);        

              dtostrf(h, 6, 2, humidityTemp);

              // You can delete the following Serial.print's, it's just for debugging purposes

              Serial.print("Humidity: ");

              Serial.print(h);

              Serial.print(" %\t Temperature: ");

              Serial.print(t);

              Serial.print(" *C ");

              Serial.print(f);

              Serial.print(" *F\t Heat index: ");

              Serial.print(hic);

              Serial.print(" *C ");

              Serial.print(hif);

              Serial.print(" *F");

              Serial.print("Humidity: ");

              Serial.print(h);

              Serial.print(" %\t Temperature: ");

              Serial.print(t);

              Serial.print(" *C ");

              Serial.print(f);

              Serial.print(" *F\t Heat index: ");

              Serial.print(hic);

              Serial.print(" *C ");

              Serial.print(hif);

              Serial.println(" *F");

            }

            client.println("HTTP/1.1 200 OK");

            client.println("Content-Type: text/html");

            client.println("Connection: close");

            client.println();

            // your actual web page that displays temperature and humidity

            client.println("<!DOCTYPE HTML>");

            client.println("<html>");

            client.println("<head></head><body><h1>ESP8266 - Temperature and Humidity</h1><h3>Temperature in Celsius: ");

            client.println(celsiusTemp);

            client.println("*C</h3><h3>Temperature in Fahrenheit: ");

            client.println(fahrenheitTemp);

            client.println("*F</h3><h3>Humidity: ");

            client.println(humidityTemp);

            client.println("%</h3><h3>");

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

            break;

        }

        if (c == '\n') {

          // when starts reading a new line

          blank_line = true;

        }

        else if (c != '\r') {

          // when finds a character on the current line

          blank_line = false;

        }

      }

    } 

    // closing the client connection

    delay(1);

    client.stop();

    Serial.println("Client disconnected.");

  }