#include <Wire.h>
#include <PCF8574.h>
#include<WiFi.h>
#include <HTTPClient.h>

  HTTPClient http;

const String firebaseHost = "https://esp32-8a3cd-default-rtdb.firebaseio.com" ;
const String firebaseAuth = "";
String firebasePath = "/relays/relay_";

#define ssid "Wokwi-GUEST"
#define pass ""
PCF8574 pcf[8] = {
  PCF8574(0x20),
  PCF8574(0x21),
  PCF8574(0x22),
  PCF8574(0x23),
  PCF8574(0x24),
  PCF8574(0x25),
  PCF8574(0x26),
  PCF8574(0x27),
};

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);
  WiFi.begin(ssid,pass);
  while(WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(300);
  }
  Serial.println("Wifi connected");
  for(int i=0;i<=8;i++)
  {
   pcf[0].write(i, 0); 
    pcf[1].write(i, 0); 
    pcf[2].write(i, 0); 
    pcf[3].write(i, 0); 
    pcf[4].write(i, 0); 
    pcf[5].write(i, 0); 
    pcf[6].write(i, 0); 
    pcf[7].write(i, 0); 
  }

  }

void loop() 
 {

  for(int i=0;i<=63;i++)
  {
    String url = firebaseHost + firebasePath + i + ".json";
    Serial.println(url);
   
     http.begin(url);
     int select=i/8;
     int k=i%8;
    

    int code = http.GET();
    if (code > 0)
    {
      int payload = http.getSize();
     // int count=payload.toInt();
      Serial.println(payload);
      //Serial.println(count);
     
        

        if (payload==6) 
        {
            pcf[select].write(k,1);
         
         } 
        else if (payload==7) 
        {
          pcf[select].write(k,0);
        }

    }
    http.end();
  }
 }