// Define Blynk settings
#define BLYNK_TEMPLATE_ID "TMPL3FR9dY-_A"
#define BLYNK_TEMPLATE_NAME "SMART GLASSES FOR VISUALLY BLIND"
#define BLYNK_AUTH_TOKEN "W0UQHwSq9Dhcz1WnUfMhgtRtjp16gwi1"


#include <Wire.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <DHT.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
// #include <TinyGPSPlus.h>  // GPS library is commented out


// Ultrasonic Sensor Pins
#define TRIG_PIN1 14
#define ECHO_PIN1 13
#define TRIG_PIN2 45
#define ECHO_PIN2 48

// IR Sensor Pins
#define IR_PIN1 15
#define IR_PIN2 42
#define IR_PIN3 35

// DHT22 Sensor Settings
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Buzzer Pin
#define BUZZER_PIN 12

// Temperature Sensor Pins
#define ONE_WIRE_BUS 18
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// GPS Settings
// TinyGPSPlus gps;  // GPS object is commented out
// HardwareSerial gpsSerial(1); // RX, TX  // GPS serial object is commented out

// WiFi and Blynk settings
char ssid[] = "Hash";
char pass[] = "contrasena";

// ThingSpeak settings
unsigned long myChannelNumber = 2628555;
const char * myWriteAPIKey = "TSBK165SONTOXYR1Y";
WiFiClient client;

void setup() {
  Serial.begin(115200);
  // gpsSerial.begin(9600);  // GPS serial initialization is commented out

  // Initialize sensors and modules
  pinMode(TRIG_PIN1, OUTPUT);
  pinMode(ECHO_PIN1, INPUT);
  pinMode(TRIG_PIN2, OUTPUT);
  pinMode(ECHO_PIN2, INPUT);

  pinMode(IR_PIN1, INPUT);
  pinMode(IR_PIN2, INPUT);
  pinMode(IR_PIN3, INPUT);

  pinMode(BUZZER_PIN, OUTPUT);

  dht.begin();
  sensors.begin();

  // Initialize WiFi, Blynk, and ThingSpeak
  WiFi.begin(ssid, pass);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
 // ThingSpeak.begin(client);
}

void loop() {
  Blynk.run();
  checkUltrasonicSensors();
  checkIRSensors();
  checkTemperature();
  // checkGPS();  // GPS check function is commented out
  delay(2000); // delay between checks
}

void checkUltrasonicSensors() {
  long duration1, distance1, duration2, distance2;

  // Ultrasonic 1
  digitalWrite(TRIG_PIN1, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN1, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN1, LOW);
  duration1 = pulseIn(ECHO_PIN1, HIGH);
  distance1 = (duration1 * 0.034) / 2;

  // Ultrasonic 2
  digitalWrite(TRIG_PIN2, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN2, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN2, LOW);
  duration2 = pulseIn(ECHO_PIN2, HIGH);
  distance2 = (duration2 * 0.034) / 2;

  // Object detection
  if (distance1 < 50 || distance2 < 50) {
    Serial.println("Obstacle ahead");
    // tone(BUZZER_PIN, 1000, 200); // Uncomment if buzzer needed
  }

  // Stairs detection (up or down)
  if (distance1 > distance2 + 10) {
    Serial.println("Stairs down detected");
  } else if (distance2 > distance1 + 10) {
    Serial.println("Stairs up detected");
  }
}

void checkIRSensors() {
  int ir1 = digitalRead(IR_PIN1);
  int ir2 = digitalRead(IR_PIN2);
  int ir3 = digitalRead(IR_PIN3);

  // Hole or gap detection
  if ((ir1 == LOW && ir2 == LOW) || (ir2 == LOW && ir3 == LOW) || (ir1 == LOW && ir3 == LOW)) {
    Serial.println("Gap detected");
    // tone(BUZZER_PIN, 1500, 200); // Uncomment if buzzer needed
  }
}

void checkTemperature() {
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);
  float tempDHT = dht.readTemperature();

  if (temperature > 30 || tempDHT > 30) {
    Serial.println("Hot object detected");
    // tone(BUZZER_PIN, 1000, 200); // Uncomment if buzzer needed
  }
}

// void checkGPS() {  // GPS function is commented out
//   while (gpsSerial.available() > 0) {
//     gps.encode(gpsSerial.read());
//     if (gps.location.isUpdated()) {
//       float latitude = gps.location.lat();
//       float longitude = gps.location.lng();
//
//       // Send location to ThingSpeak
//       ThingSpeak.setField(1, latitude);
//       ThingSpeak.setField(2, longitude);
//       ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
//
//       Serial.print("Location updated: ");
//       Serial.print("Latitude: ");
//       Serial.print(latitude, 6);
//       Serial.print(", Longitude: ");
//       Serial.println(longitude, 6);
//     }
//   }
// }