/************************************************** 
* Smart Home Automation System using ESP32 Microcontroller * 
* SUBMITTED BY: ESQUILONA, JAYDEL E. * 
* SUBMITTED TO: PROF. MICHAEL T. SAMONTE * 
* *************************************************/
#include <IRremote.h>
#include <WiFi.h>
#include <ThingSpeak.h>
WiFiClient client;
long myChannelNumber = 2655195;
const char * myWriteAPIKey = "O2URDBSK1EPURZ0I";
int statusCode;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";  
#define IRpin 14   
IRrecv receiver(IRpin);
const int relayPins[] = {21, 19, 16, 15};  

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

  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  
  // Set up relay pins
  for (int i = 0; i < 4; i++) {
    pinMode(relayPins[i], OUTPUT);
    digitalWrite(relayPins[i], LOW);  // Turn off relays initially
  }
}

void loop() {
  if(WiFi.status() != WL_CONNECTED)  
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 
  // Checks received an IR signal
  if (receiver.decode()) {
    translator();
    receiver.resume();  // Receive the next value
  }
}

void translator() {
  // Takes command based on IR code received
  switch (receiver.decodedIRData.command) {
    case 90:
      operateRelay(0);
      break;
    case 66:
      operateRelay(1);
      break;
    case 74:
      operateRelay(2);
      break;
    case 82:
      operateRelay(3);
      break;
    default:
      Serial.println("Button has no Function");
  }
}

void operateRelay(int relayIndex) {
  // Toggle the relay
  digitalWrite(relayPins[relayIndex], !digitalRead(relayPins[relayIndex]));
  
  // Print the status to serial
  Serial.print("Button Pressed - Relay Number: ");
  Serial.println(relayIndex + 1);
}
ThingSpeak.setField(1, Button Pressed - Relay Number);
   ThingSpeak.setField(2, relayIndex + 1);
    

 statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
 if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}