#include <ESP8266WiFi.h>

const char* ssid = "xxxxx"; // fill in here your router or wifi SSID
const char* password = "yyyyy"; // fill in here your router or wifi password
#define RELAY 0 // relay connected to  GPIO0
WiFiServer server(80);

void setup()
{
  //Serial.begin(115200); // must be same baudrate with the Serial Monitor
  Serial.begin(9600);

  pinMode(RELAY, OUTPUT);
  digitalWrite(RELAY, LOW);

  // Connect to WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Server started");

  // Print the IP address
  Serial.print("Use this URL to connect: ");
  Serial.print("https://192.168.0.178/");
  Serial.print(WiFi.localIP());
  Serial.println("/");

}

void loop()
{
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client)
  {
    return;
  }

  // Wait until the client sends some data
  Serial.println("new client");
  while (!client.available())
  {
    delay(1);
  }

  // Read the first line of the request
  String request = client.readStringUntil('\r');
  Serial.println(request);
  client.flush();

  // Match the request
  int value = LOW;
  if (request.indexOf("/RELAY=ON") != -1)
  {
    Serial.println("RELAY=ON");
    //Ide irtam a soros parancsokat**************
    delay(500);
    Serial.write(0xA0);
    Serial.write(0x01);
    Serial.write(0x01);
    Serial.write(0xA2);
    Serial.println("<-- Relay_ON(A00101A2HEX)");
    //********************************************
    digitalWrite(RELAY, LOW);
    value = LOW;
  }
  if (request.indexOf("/RELAY=OFF") != -1)
  {
    Serial.println("RELAY=OFF");
    //ide irtam a soros parancsokat**************
    delay(500);
    Serial.write(0xA0);
    Serial.write(0x01);
    Serial.write(0x00);
    Serial.write(0xA1);
    Serial.println("<-- Relay_OFF(A00100A1HEX)");
    //*********************************************
    digitalWrite(RELAY, HIGH);
    value = HIGH;
  }

  // Return the response
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  this is a must
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("<head><title>ESP8266 RELAY Control</title></head>");
  client.print("Relay is now: ");

  if (value == HIGH)
  {
    client.print("OFF");
  }
  else
  {
    client.print("ON");
  }
  client.println("<br><br>");
  client.println("Turn <a href=\"/RELAY=OFF\">OFF</a> RELAY<br>");
  client.println("Turn <a href=\"/RELAY=ON\">ON</a> RELAY<br>");
  client.println("</html>");

  delay(1);
  Serial.println("Client disonnected");
  Serial.println("");
}
