arduino door control

door-control.ino

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

byte mac[] = {0x84, 0xF6, 0x9E, 0x23, 0x5E, 0xFF};
IPAddress ip(192, 168, 90, 248);
EthernetServer server(80);

void setup() {
  Serial.begin(9600);

  Ethernet.begin(mac, ip);

  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);

  open();
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}

String split(String data, char separator, int index)
{
  int found = 0;
  int strIndex[] = {
    0, -1
  };
  int maxIndex = data.length() - 1;
  for (int i = 0; i <= maxIndex && found <= index; i++) {
    if (data.charAt(i) == separator || i == maxIndex) {
      found++;
      strIndex[0] = strIndex[1] + 1;
      strIndex[1] = (i == maxIndex) ? i + 1 : i;
    }
  }
  return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}

void open() {


  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);

  delay(5000);


  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
}


void loop() {
  EthernetClient client = server.available();

  bool shouldOpen = false;

  if (client) {
    Serial.println("new client");
    String data = "";
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        Serial.write(c);

        if (c == '\n') {
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: application/json");
          client.println("Connection: close");
          client.println();

          String url = split(data, ' ', 1);
          shouldOpen = (url == "/open");

          client.println("{\"data\":\"" + url + "\"}");
          break;
        }
        else if (c != '\r') {
          data += c;
        }

      }
    }
    delay(1);
    client.stop();

    if (shouldOpen) {
      open();
    }
  }
}