Relay IoT – رله قابل کنترل توسط اینترنت

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


// Network settings
byte mac[]     = { 0xDE, 0xED, 0xDD, 0xDD, 0xFE, 0xED };
EthernetClient eth;

char server[]  = "www.ic2pro.com";                          // Wiring Cloud host name
int port       = 80;
String devId   = "111-222-333";                             // Device ID. CREATE YOUR OWN GUID; Use this http://www.guidgenerator.com/
String auth    = "dXNlcjpwYXNzd29yZA==";                    // Authentication credentials Create a string from <email_address>:<API_Password> and encode it base64
                                                            // The sample here "dXNlcjpwYXNzd29yZA==" is the encoding for "user:password"

int lastState;       // last known state of the relay
int relayPin = 8;    // pin used to read the PIR sensor

void setup() {
  Serial.begin(115200);        // start serial monitoring
  pinMode(relayPin, OUTPUT);   // set-up relay pin
  Ethernet.begin(mac);         // start network communication
  delay(1000);
  
  Serial.println("Start...");

  lastState = -۱;              // force relay to take the first command
  digitalWrite(relayPin, lastState);
}

void loop() {
  String state = readRelay();
  Serial.println("[" + state + "]");
  if((state.indexOf("RELAY,ON") > 0) && (lastState != 1)) {        // turn ON relay
    lastState = ۱;
    digitalWrite(relayPin, lastState);
  }
  else if((state.indexOf("RELAY,OFF") > 0) && (lastState != 0)) {  // turn OFF relay
    lastState = ۰;
    digitalWrite(relayPin, lastState);
  }
  delay(1000);
}

String readRelay() {
  if (eth.connect(server, port)) {  // connect to server
    Serial.println("Connected...");
    eth.println("GET http://" + String(server) + ":" + String(port) + "/Wire/connector/get?id=" + devId + "&RELAY HTTP/1.1");  // request state from server
    eth.println("Authorization: Basic " + auth);
    eth.println("Connection: close");
    eth.println();
    Serial.println("Event Sent...");
    return readResponse();
  }
  else {
    Serial.println("Connection Error");
    return "";
  }
}

String readResponse()
{
  while (eth.connected() && !eth.available()) delay(1);          // wait for data

  String buff = "";                                              // read data in the variable buff
  while (eth.connected() || eth.available()) {
    char c = eth.read();
    buff += c;
  }
  eth.stop();
  return buff;
}