#define BUZZER_PIN D8

const float TEMP_THRESHOLD = 35.0;
const float HUM_THRESHOLD  = 70.0;
const int GAS_THRESHOLD    = 400;

float temp = 0, hum = 0;
int gas = 0;

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW);

  Serial.println("STM32 + Manual Input Alarm System");
  Serial.println("---------------------------------");
  Serial.println("Enter values as: temp humidity gas");
  Serial.println("Example: 30 50 200");
}

void loop() {
  if (Serial.available() > 0) {
    temp = Serial.parseFloat();  // Read temperature
    hum  = Serial.parseFloat();  // Read humidity
    gas  = Serial.parseInt();    // Read gas value

    // Clear input buffer (optional safety)
    while (Serial.available()) Serial.read();

    if (temp == 0 && hum == 0 && gas == 0) {
      Serial.println("Invalid input! Example: 30 50 200");
      delay(1000);
      return;
    }

    Serial.print("Temperature: ");
    Serial.print(temp);
    Serial.print(" °C | Humidity: ");
    Serial.print(hum);
    Serial.print(" % | Gas: ");
    Serial.print(gas);
    Serial.print(" ppm");

    if (temp > TEMP_THRESHOLD || hum > HUM_THRESHOLD || gas > GAS_THRESHOLD) {
      Serial.println("  --> ALERT!");
      digitalWrite(BUZZER_PIN, HIGH);
    } else {
      Serial.println("  --> Normal");
      digitalWrite(BUZZER_PIN, LOW);
    }

    delay(1000);
  }
}