LAN_Senser.ino

//LAN
#include <Ethernet.h>
#include <SPI.h>
//DHTsernser
#include <DHT.h>

/*////////////////////////////
 * LANシールド
 * 4, 10, 11, 12, 13
 * LAN: 10
 * SD: 4
 * 共通: 11, 12, 13
*/////////////////////////////

////////
//LAN Setting
///////
byte mac[] = {
  0x90, 0xA2, 0xDA, 0x74, 0x3D, 0x5D
};
IPAddress ip(192, 168, 1, 5);
EthernetServer server(80);

///////
//DHT Setting
///////
#define DHTPIN 2
#define DHTTYPE 11
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  while(!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }
  Serial.print("Starting Server...");

  Ethernet.begin(mac, ip);
  dht.begin();
  Serial.println("ok");
  Serial.print("Server IPAdress :");
  Serial.println(Ethernet.localIP());
}

void loop() {
  EthernetClient client = server.available();
  if( client ) {
    Serial.println("New Client..");
    boolean currentLineIsBlank = true;
    while( client.connected() ) {
      if( client.available() ) {
        char c = client.read();
        Serial.write(c);

        //DHTのデータを取得
        float h = dht.readHumidity();
        float t = dht.readTemperature();
        float f = dht.readTemperature(true);
        boolean dhtcan = true;

        if (isnan(h) || isnan(t) || isnan(f)) {
          dhtcan = false;
        }
        
        float hif = dht.computeHeatIndex(f, h);
        float hic = dht.computeHeatIndex(t, h, false);

        if( c == '\n' && currentLineIsBlank ) {
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: application/json");
          client.println("charset=utf-8");
          client.println("Connection: close");
          client.println();
          client.print("{");
          client.print("\"ipaddress\":\"");
          client.print(Ethernet.localIP());
          client.print("\",\"macaddress\":\"");
          //
          for( int cnt=0; cnt < 4; cnt++ ) {
            client.print("0x");
            client.print(mac[cnt], HEX);
            if( cnt < 3 ) {
              client.print(", ");
            }
          }
          
          client.print("\",\"dht\": {\"dhttype\":\"");
          client.print(DHTTYPE);
          client.print("\",");
          if( dhtcan ) {
            client.print("\"humidity\":\"");
            client.print(h);
            client.print("\",\"temperature\":{\"c\":\"");
            client.print(t);
            client.print("\",\"f\":\"");
            client.print(f);
            client.print("\"},\"heat\":{\"c\":\"");
            client.print(hic);
            client.print("\",\"f\":\"");
            client.print(hif);
            client.print("\"}"); 
          }else {
            client.print("\"error\":\"null\"");
          }
          client.println("}}");

          break;
        }
        if( c == '\n' ) {
          currentLineIsBlank = true;
        } else if( c != '\r' ) {
          currentLineIsBlank = false;
        }
      }
    }

    delay(1);
    client.stop();
    Serial.println("Client Disconnected");
  }
}