Mikrocontroller: ... als Text

#include <NTPClient.h>

/*********
  Rui Santos
  Complete project details at https://RandomNerdTutorials.com/esp32-websocket-server-arduino/
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
*********/

// Import required libraries
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h" //for disabling brownout detector
#include "time.h"
#include <WiFiUdp.h>
#include "sntp.h" // aktuelle Zeit holen


#include <DHT.h>
#define DHT_SENSOR_PIN  12 // ESP32 pin GPIO21 connected to DHT11 sensor
#define DHT_SENSOR_TYPE DHT22

DHT dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);

// Replace with your network credentials
const char* ssid = "ESP32net";
const char* password = "";

const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec = 1*3600; // GMT+1 (2 Stunde Zeitunterschied), 1 im Winter
const int daylightOffset_sec = 0;

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, ntpServer, gmtOffset_sec);

WiFiServer server(80);

const char index_html[] PROGMEM = R"rawliteral(
<!DOCTYPE HTML><html>
<head>
  <title>ESP-Temperatur & Luftfeuchtigkeit-Web Server</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" href="data:,">
  <style>
  html {
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
  }
  h1 {
    font-size: 0.8rem;
    color: blue;
  }
  table, th, td {
      padding: 10px;
      border: 1px solid black; 
      border-collapse: collapse;
      }
  h2{
    font-size: 1.5rem;
    font-weight: bold;
    color: #143642;
  }
  .topnav {
    overflow: hidden;
    background-color: #143642;
  }
  body {
    margin: 0;
  }
  .content {
    padding: 30px;
    max-width: 600px;
    margin: 0 auto;
  }
  .card {
    background-color: #F8F7F9;;
    box-shadow: 2px 2px 12px 1px rgba(140,140,140,.5);
    padding-top:10px;
    padding-bottom:20px;
  }
  .button {
    padding: 15px 50px;
    font-size: 24px;
    text-align: center;
    outline: none;
    color: #fff;
    background-color: #0f8b8d;
    border: none;
    border-radius: 5px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
   }
   /*.button:hover {background-color: #0f8b8d}*/
   .button:active {
     background-color: #0f8b8d;
     box-shadow: 2 2px #CDCDCD;
     transform: translateY(2px);
   }
   .state {
     font-size: 1.5rem;
     color:#8c8c8c;
     font-weight: bold;
   }
  </style>
</head>
)rawliteral";

void setup(){
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector

  // Serial port for debugging purposes
  Serial.begin(9600);
  Serial.println("Monitor an");
  dht_sensor.begin(); // initialize the DHT sensor
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi..");
  }

  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // Zeitübertragung über NTP konfigurieren
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
 
  server.begin();
  Serial.println("Read from DHT sensor:");

}

void loop() {
  // read humidity
  float humi  = dht_sensor.readHumidity();
  // read temperature in Celsius
  float tempC = dht_sensor.readTemperature();
  // read temperature in Fahrenheit
  float tempF = dht_sensor.readTemperature(true);
  // check whether the reading is successful or not
  if ( isnan(tempC) || isnan(tempF) || isnan(humi)) {
    //Serial.println("Failed to read from DHT sensor!");
    //Serial.print(".");
  } else {
    Serial.print("Humidity: ");
    Serial.print(humi);
    Serial.print("%");

    Serial.print("  |  ");

    Serial.print("Temperature: ");
    Serial.print(tempC);
    Serial.print("°C  ~  ");
    Serial.print(tempF);
    Serial.println("°F");
    delay(3000);
  }
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    Serial.println("Keine Zeit verfügbar (noch nicht)");
    return;
  }

  // Die Zeit in einem String speichern
  char timeString[50];
  strftime(timeString, sizeof(timeString), "%A, %B %d %Y %H:%M:%S", &timeinfo);

  // Hier können Sie die Zeit auf der seriellen Schnittstelle ausgeben
  Serial.println(timeString);

  WiFiClient client = server.available();   // listen for incoming clients

  if (client) {                             // if you get a client,
    Serial.println("New Client.");           // print a message out the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();
            client.println(index_html);
            // Tabelle formatieren
            
            // the content of the HTTP response follows the header:
            client.println("<body>");
            client.print("<h2><table><tr><td>Temperatur: </td><td></td><td>Luftfeuchtigkeit: </td></tr><tr><td>T = ");
            client.print(tempC);
            client.print(" &deg;C</td>");
            client.print("<td></td><td>H = ");
            client.print(humi);
            client.print(" %</td></tr></tr></table></h2>");
            client.print("<h1><table><tr><td>Aktuelle Zeit: ");
            client.println(timeString);
            client.print("</td></tr></table></h1>");
            // Fügen Sie den Reload-Button hinzu
            client.println("<form><input type='button' value='Seite aktualisieren' onClick='window.location.reload()'></form>");

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

            // The HTTP response ends with another blank line:
            client.println();
            // break out of the while loop:
            break;
          } else {    // if you got a newline, then clear currentLine:
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // close the connection:
    client.stop();
    Serial.println("Client Disconnected.");
    }
    delay(2000);
  }
Last modified: Monday, 9 December 2024, 9:25 AM