#include <DHT.h>
#include <Wire.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>

// ---- Pin map (matches diagram.json) ----
#define DHTPIN     18
#define DHTTYPE    DHT22
#define PIR_PIN    27
#define MQ2_PIN    34   // ADC1_CH6, after the R1/R2 divider
#define LED1_PIN   25
#define LED2_PIN   32
#define BUZZER_PIN 33

// GPIO16/17 (UART2) are reserved for the GPS module on real hardware.
// GPIO5/18/19/23/14/26 are reserved for the SX1276 LoRa module on real hardware.
// Neither GPS nor LoRa has native Wokwi simulation support, so this sketch
// only exercises the sensors that ARE simulated. Swap in TinyGPS++ / RadioHead
// LoRa code once you move this onto real hardware.

DHT dht(DHTPIN, DHTTYPE);
Adafruit_MPU6050 mpu;

void setup() {
  Serial.begin(115200);
  delay(300);
  Serial.println("AEROMESH node - sensor bring-up test");

  pinMode(PIR_PIN, INPUT);
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  dht.begin();

  if (!mpu.begin()) {
    Serial.println("MPU6050 not found - check wiring");
  } else {
    mpu.setAccelerometerRange(MPU6050_RANGE_2_G);
    mpu.setGyroRange(MPU6050_RANGE_250_DEG);
    Serial.println("MPU6050 ready");
  }
}

void loop() {
  float temp = dht.readTemperature();
  float hum  = dht.readHumidity();
  int motion = digitalRead(PIR_PIN);
  int gasRaw = analogRead(MQ2_PIN);

  sensors_event_t a, g, tempEvent;
  mpu.getEvent(&a, &g, &tempEvent);

  Serial.println("---- reading ----");
  Serial.printf("Temp: %.1f C  Humidity: %.1f %%\n", temp, hum);
  Serial.printf("Motion: %s\n", motion ? "DETECTED" : "clear");
  Serial.printf("Gas (raw ADC): %d\n", gasRaw);
  Serial.printf("Accel X/Y/Z: %.2f %.2f %.2f m/s^2\n", a.acceleration.x, a.acceleration.y, a.acceleration.z);

  bool alert = (motion || gasRaw > 2000 || isnan(temp));
  digitalWrite(LED1_PIN, alert ? HIGH : LOW);
  digitalWrite(LED2_PIN, alert ? LOW : HIGH);
  digitalWrite(BUZZER_PIN, alert ? HIGH : LOW);

  delay(2000);
  digitalWrite(BUZZER_PIN, LOW);
}