ESP12: wifi et DHT11

22193f426a51b7ae0d9a7a7f6bf733ac

connexion en AP ou WIFI

Exemple à télécharger ici

Autre exemple basée sur la librairie DHT11  décrit ici

 // 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 = "xxx";  
 const char* password = "xxx";  
 // Web Server on port 80  
 WiFiServer server(80);  
 // DHT Sensor  
 const int DHTPin = 5;  
 // 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.");  
  }  
 }  
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