Arduino-file.ino

#include <Arduino.h>
#if defined(ESP32) || defined(ARDUINO_RASPBERRY_PI_PICO_W)
#include <WiFi.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#endif

#include <Firebase_ESP_Client.h>

// Provide the RTDB payload printing info and other helper functions.
#include <addons/RTDBHelper.h>

/* 1. Define the WiFi credentials */
#define WIFI_SSID "wifi_name"
#define WIFI_PASSWORD "--------"

/* 2. If work with RTDB, define the RTDB URL and database secret */
#define DATABASE_URL "----------" //<databaseName>.firebaseio.com or <databaseName>.<region>.firebasedatabase.app
#define DATABASE_SECRET "--------"

/* 3. Define the Firebase Data object */
FirebaseData fbdo;

/* 4, Define the FirebaseAuth data for authentication data */
FirebaseAuth auth;

/* Define the FirebaseConfig data for config data */
FirebaseConfig config;

unsigned long dataMillis = 0;
int count = 0;

#if defined(ARDUINO_RASPBERRY_PI_PICO_W)
WiFiMulti multi;
#endif

void setup()
{

    pinMode(D4,OUTPUT);
    pinMode(D2,INPUT);
    pinMode(D5,OUTPUT);

    Serial.begin(115200);

#if defined(ARDUINO_RASPBERRY_PI_PICO_W)
    multi.addAP(WIFI_SSID, WIFI_PASSWORD);
    multi.run();
#else
    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
#endif

    Serial.print("Connecting to Wi-Fi");
    unsigned long ms = millis();
    while (WiFi.status() != WL_CONNECTED)
    {
        Serial.print(".");
        delay(300);
#if defined(ARDUINO_RASPBERRY_PI_PICO_W)
        if (millis() - ms > 10000)
            break;
#endif
    }
    Serial.println();
    Serial.print("Connected with IP: ");
    Serial.println(WiFi.localIP());
    Serial.println();

    Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);

    /* Assign the certificate file (optional) */
    // config.cert.file = "/cert.cer";
    // config.cert.file_storage = StorageType::FLASH;

    /* Assign the database URL and database secret(required) */
    config.database_url = DATABASE_URL;
    config.signer.tokens.legacy_token = DATABASE_SECRET;

    // The WiFi credentials are required for Pico W
    // due to it does not have reconnect feature.
#if defined(ARDUINO_RASPBERRY_PI_PICO_W)
    config.wifi.clearAP();
    config.wifi.addAP(WIFI_SSID, WIFI_PASSWORD);
#endif

    Firebase.reconnectWiFi(true);

    /* Initialize the library with the Firebase authen and config */
    Firebase.begin(&config, &auth);

    // Or use legacy authenticate method
    // Firebase.begin(DATABASE_URL, DATABASE_SECRET);
}

void loop()
{
    if (millis() - dataMillis > 1000)
    {
        dataMillis = millis();
        // Serial.printf("Set int... %s\n", Firebase.RTDB.setInt(&fbdo, "/test/int", count++) ? "ok" : fbdo.errorReason().c_str());
        // int a = Firebase.RTDB.getInt(&fbdo,"/LED");
        // Firebase.RTDB.get(&fbdo, "/LED");
        // String str = fbdo.to<String>();
        //  a = fbdo;
        Firebase.RTDB.get(&fbdo, "/LED");
 
        int value = fbdo.to<float>();
  // String str = fbdo.to<String>();

        if(value==1){
          digitalWrite(D4,1);
          int va = digitalRead(D2);
          Serial.println(va);
          if(va==0){
            Firebase.RTDB.setInt(&fbdo, "/trespassing", 0);
            digitalWrite(D5,0);

          }
          else{
            Firebase.RTDB.setInt(&fbdo, "/trespassing", 1);
            digitalWrite(D5,1);
             
          delay(1000);  
          }
        }
        else{
          digitalWrite(D4,0);
          digitalWrite(D5,0);
          // digitalWrite(D2,0);

        }
    }
}