ESP8266 for selonoid lock

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#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
 
// Replace with your network credentials
char ssid[] = "404 Not Found";
char pass[] = "password";
char auth[] = "9FR_Idlv8jVtc-W9nWoHlHwIr_sD3-ub";
 
// Pin definitions
#define FLAME_SENSOR_PIN D1
#define GAS_SENSOR_PIN A0
#define RAIN_SENSOR_PIN D4
#define BUZZER_PIN D2
#define RELAY_PIN D3
 
// Thresholds
#define GAS_THRESHOLD 300
#define RAIN_THRESHOLD 500
 
void setup() {
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
 
  pinMode(FLAME_SENSOR_PIN, INPUT);
  pinMode(GAS_SENSOR_PIN, INPUT);
  pinMode(RAIN_SENSOR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
 
  Serial.println("System initialized. Waiting for flame, gas, and rain detection...");
}
 
void loop() {
  Blynk.run();
 
  // Flame sensor logic
  int flameStatus = digitalRead(FLAME_SENSOR_PIN);
  if (flameStatus == LOW) { // Flame detected
    Serial.println("Flame detected! Activating buzzer and relay...");
    Blynk.virtualWrite(V3, "Flame Detected");
    Blynk.logEvent("flamealert");
    digitalWrite(BUZZER_PIN, HIGH); // Turn on buzzer
    digitalWrite(RELAY_PIN, HIGH); // Turn on relay
  } else { // No flame detected
    Serial.println("No flame detected. Buzzer and relay off.");
    Blynk.virtualWrite(V3, "No Flame");
    digitalWrite(BUZZER_PIN, LOW); // Turn off buzzer
    digitalWrite(RELAY_PIN, LOW); // Turn off relay
  }
 
  // Gas sensor logic
  int gasValue = analogRead(GAS_SENSOR_PIN);
  Serial.print("Gas level: ");
  Serial.println(gasValue);
  Blynk.virtualWrite(V1, gasValue);
 
  if (gasValue > GAS_THRESHOLD) { // Gas detected
    Serial.println("Gas detected! Activating buzzer and relay...");
    Blynk.logEvent("gasalert");
    digitalWrite(BUZZER_PIN, HIGH); // Turn on buzzer
    digitalWrite(RELAY_PIN, HIGH); // Turn on relay
  }
 
  // Rain sensor logic
  int rainValue = analogRead(RAIN_SENSOR_PIN);
  Serial.print("Rain level: ");
  Serial.println(rainValue);
 
  if (rainValue < RAIN_THRESHOLD) { // Rain detected
    Serial.println("Rain detected! Activating buzzer and relay...");
    Blynk.virtualWrite(V2, "Rain Detected");
    Blynk.logEvent("rainalert");
    digitalWrite(BUZZER_PIN, HIGH); // Turn on buzzer
    digitalWrite(RELAY_PIN, HIGH); // Turn on relay
  } else { // No rain detected
    Serial.println("No rain detected.");
    Blynk.virtualWrite(V2, "No Rain");
    digitalWrite(BUZZER_PIN, LOW); // Turn off buzzer
  }
 
  delay(2000);
}