Library Arduino

สวัสดีครับ ใครพอจะแทรก หรือ รวม Library Arduino ได้บ้างครับ

ของผมจะดูอุณหภูมิผ่าน Eternet ผมทำได้แล้ว แต่ติดตรงที่จะให้ LED ติดเมื่ออุณหภูมิเกินค่าที่กำหนด และดับเมื่อถึงอีกค่านึง

ผมค่อนข้าง  งงงงง เกี่ยวกับคำสั่ง if ไม่ว่าจะแทรกตรงไหนก็ไม่ได้ บางทีก็คอมพายได้แต่ดันไม่ทำงาน  

ใครรุ้ช่วยบอกทีครับ  ไปไม่ถูกจริงๆๆ นี่ครับ Library ผม  และนี่ครับที่อยากจะแทรก    

                                                                                                                         if(dht.readTemperature() > 27)
                                                                                                                         {
                                                                                                                         digitalWrite(12, HIGH);  // LED ON


#include <SPI.h>
#include <Ethernet.h>
#include "DHT.h"

#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11
DHT dht(DHTPIN, DHTTYPE);
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(172, 27, 6, 143);
IPAddress gateway(172, 27, 6, 241);
IPAddress subnet(255, 255, 255, 0);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup() {
// Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

//IPAddress myIPAddress = Ethernet.localIP();
  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
//dht.begin();

}


void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connection: close");  // the connection will be closed after completion of the response
  client.println("Refresh: 5");  // refresh the page automatically every 5 sec
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
            
            
            
            client.print("PEA_S2");
            client.println("<br />");
            client.println("<br />");
            client.print("High Speed Communication Section");
            client.println("<br />");
            client.println("<br />");
            client.print("Humidity: ");
            client.print(dht.readHumidity());
            client.print(" Temperature: ");
            client.print(dht.readTemperature());
            client.println("<br />");
            
            client.println("</html>");
            break;
            

        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
}
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