/********* Rui Santos Complete project details at https://randomnerdtutorials.com *********/ // Import required libraries #include "WiFi.h" #include "ESPAsyncWebServer.h" #include #include // Replace with your network credentials const char* ssid = "xxxxxxxxxxxx"; const char* password = "xxxxxxxxxxxxxx"; #define DHTPIN 13 // Digital pin connected to the DHT sensor // Uncomment the type of sensor in use: //#define DHTTYPE DHT11 // DHT 11 #define DHTTYPE DHT22 // DHT 22 (AM2302) //#define DHTTYPE DHT21 // DHT 21 (AM2301) DHT dht(DHTPIN, DHTTYPE); // Create AsyncWebServer object on port 80 AsyncWebServer server(80); String readDHTTemperature() { // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) // Read temperature as Celsius (the default) float t = dht.readTemperature(); // Read temperature as Fahrenheit (isFahrenheit = true) //float t = dht.readTemperature(true); // Check if any reads failed and exit early (to try again). if (isnan(t)) { Serial.println("Failed to read from DHT sensor!"); return "--"; } else { Serial.println(t); return String(t); } } String readDHTHumidity() { // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) float h = dht.readHumidity(); if (isnan(h)) { Serial.println("Failed to read from DHT sensor!"); return "--"; } else { Serial.println(h); return String(h); } } const char index_html[] PROGMEM = R"rawliteral(

ESP32 Serveur DHT 22

Temperature %TEMPERATURE% ^°C

Humidite %HUMIDITY% ^%

)rawliteral"; // Replaces placeholder with DHT values String processor(const String& var){ //Serial.println(var); if(var == "TEMPERATURE"){ return readDHTTemperature(); } else if(var == "HUMIDITY"){ return readDHTHumidity(); } return String(); } void setup(){ // Serial port for debugging purposes Serial.begin(115200); dht.begin(); // Connect to Wi-Fi WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("Connecting to WiFi.."); } // Print ESP32 Local IP Address Serial.println(WiFi.localIP()); // Route for root / web page server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){ request->send_P(200, "text/html", index_html, processor); }); server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request){ request->send_P(200, "text/plain", readDHTTemperature().c_str()); }); server.on("/humidity", HTTP_GET, [](AsyncWebServerRequest *request){ request->send_P(200, "text/plain", readDHTHumidity().c_str()); }); // Start server server.begin(); } void loop(){ }