Arduino brain code

#include <SoftwareSerial.h>
#include <TinyGPS++.h>

// SENSORS SETUP 
const int flamePin = A0; 
const int soundPin = A1; 
const int vibPin = A2;

// GPS & GSM SETUP 
SoftwareSerial gsmSerial(10, 11); 
SoftwareSerial gpsSerial(12, 13); 
TinyGPSPlus gps;

unsigned long lastSmsTime = 0;
bool dangerState = false;

void setup() {
  Serial.begin(9600);   
  gsmSerial.begin(9600); 
  gpsSerial.begin(9600); 
  
  Serial.println(F("--------------------------------------"));
  Serial.println(F("RADAR BRAIN: ONLINE & SCANNING"));
  Serial.println(F("Searching for GPS Satellites..."));
  Serial.println(F("--------------------------------------"));
}

void loop() {
  //  Read Analog Danger Sensors
  int flameVal = analogRead(flamePin);
  int soundVal = analogRead(soundPin);
  int vibVal = analogRead(vibPin);

  // Listen to GPS for Location
  gpsSerial.listen(); 
  while (gpsSerial.available() > 0) {
    gps.encode(gpsSerial.read());
  }

  // Print Live Dashboard to Serial Monitor
  Serial.print(F("Flame: ")); Serial.print(flameVal); 
  Serial.print(F(" | Sound: ")); Serial.print(soundVal); 
  Serial.print(F(" | Vib: ")); Serial.print(vibVal);
  Serial.print(F(" || GPS: "));
  
  if (gps.location.isValid()) {
    Serial.print(gps.location.lat(), 6); Serial.print(F(", ")); Serial.println(gps.location.lng(), 6);
  } else {
    Serial.println(F("Searching"));
  }

  // DETECTION LOGIC
  bool currentDanger = false;
  String dangerType = "";

  // Thresholds check 
  if (flameVal < 500) { currentDanger = true; dangerType = "FIRE"; }
  else if (vibVal > 800) { currentDanger = true; dangerType = "VIBRATION"; }
  else if (soundVal > 800) { currentDanger = true; dangerType = "LOUD NOISE"; }

  //  ACTION & SMS 
  if (currentDanger) {
    if (!dangerState) {
      Serial.println(F("\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"));
      Serial.print(F(">>> DANGER DETECTED: ")); Serial.print(dangerType); Serial.println(F(" <<<"));
      dangerState = true;
      
      // Send SMS only once every 30 seconds
      if (millis() - lastSmsTime > 30000) {
        sendSMS(dangerType, flameVal, soundVal, vibVal);
        lastSmsTime = millis();
      } else {
        Serial.println(F("SMS Cooldown Active. Please wait..."));
      }
      Serial.println(F("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n"));
    }
  } else {
    dangerState = false; 
  }

  delay(500);
}

// SMS FUNCTION 
void sendSMS(String alert, int f, int s, int v) {
  Serial.println(F("INITIATING SMS PROTOCOL..."));
  
  // Switch listening from GPS to GSM
  gsmSerial.listen(); 
  delay(500);

  // Generate Google Maps Link
  String lat = String(gps.location.lat(), 6);
  String lng = String(gps.location.lng(), 6);
  String mapLink = "Loc: http://maps.google.com/?q=" + lat + "," + lng;

  gsmSerial.println(F("AT+CMGF=1")); 
  delay(500);
  
  // Insert number
  gsmSerial.println(F("AT+CMGS=\"+919995622878\"")); 
  delay(500);
  
  gsmSerial.print(F("ROBO RAKSHA ALERT: ")); gsmSerial.println(alert);
  gsmSerial.print(F("Flame:")); gsmSerial.print(f);
  gsmSerial.print(F(" Snd:")); gsmSerial.print(s);
  gsmSerial.print(F(" Vib:")); gsmSerial.println(v);
  gsmSerial.print(mapLink);
  
  delay(100);
  gsmSerial.write(26); 
  delay(3000);
  
  Serial.println(F(" >>> SMS SENT SUCCESSFULLY! <<<"));
  
  // Switch back to GPS listening
  gpsSerial.listen(); 
}