// Blynk credentials
#define BLYNK_TEMPLATE_ID "TMPL3VfmECvkW"
#define BLYNK_TEMPLATE_NAME "xyz"
#define BLYNK_DEVICE_NAME "abc"
#define BLYNK_AUTH_TOKEN "pGf8QlTDm9276HLLqW1TCVWVkQTk-AsP"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include <TinyGPS++.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = ""; 

// Potentiometer (Pulse Sensor)
const int PulseWire = 34; // Use GPIO 34 (ADC1 channel 6)

// Weight Potentiometer
const int WeightPotPin = 35; // Use GPIO 35 (ADC1 channel 7)

// Gas Sensor (MQ-2)
const int GasSensorPin = 32; // Use GPIO 32 (ADC1 channel 4)

// Accelerometer
Adafruit_MPU6050 mpu;

// Temperature Sensor
#define ONE_WIRE_BUS 4 // GPIO 4 for 1-Wire
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// GPS Module
// Use hardware serial port
HardwareSerial ss(2); // Serial2: RX = GPIO16, TX = GPIO17
TinyGPSPlus gps;

void setup() {
  Serial.begin(115200);
  Serial.println("Setup started...");

  // Connect to WiFi
  connectToWiFi();

  // Connect to Blynk
  Serial.println("Connecting to Blynk...");
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);
  Serial.println("Blynk connected...");

  // Initialize Accelerometer
  if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip");
    while (1) {
      delay(10);
    }
  }

  // Initialize Temperature Sensor
  sensors.begin();
}

void loop() {
  Serial.println("Loop started...");
  Blynk.run();

  // Simulate GPS Data (fallback if GPS not available)
  Serial.println("Simulating GPS Data...");
  float latitude = 37.7740 + (random(0, 1000) / 100000.0);  // Random latitude between 37.7740 and 37.7750
  float longitude = -122.4200 + (random(0, 1000) / 100000.0);  // Random longitude between -122.4200 and -122.4190

  // Read GPS Data
  while (ss.available() > 0) {
    gps.encode(ss.read());
  }

  if (gps.location.isUpdated()) {
    latitude = gps.location.lat();
    longitude = gps.location.lng();
  }

  // Read Potentiometer (Pulse Sensor) Data
  Serial.println("Reading Potentiometer Data...");
  int potValue = analogRead(PulseWire);
  int myBPM = map(potValue, 0, 4095, 0, 150); // Map the potentiometer value to a BPM range

  // Read Weight Potentiometer Data
  Serial.println("Reading Weight Potentiometer Data...");
  int weightValue = analogRead(WeightPotPin);
  float weight = map(weightValue, 0, 4095, 0, 1000); // Map the potentiometer value to a weight range (0-200 kg)

  // Read Gas Sensor Data
  Serial.println("Reading Gas Sensor Data...");
  int gasValue = analogRead(GasSensorPin);
  float gasPPM = map(gasValue, 0, 4095, 0, 10000); // Map the analog value to a gas concentration (example range 0-10000 ppm)

  // Read Accelerometer Data
  Serial.println("Reading Accelerometer Data...");
  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  // Read Temperature Data
  Serial.println("Reading Temperature Data...");
  sensors.requestTemperatures();
  float temperatureC = sensors.getTempCByIndex(0); // Fixed function call

  // Print data to Serial Monitor
  Serial.println("Printing Sensor Data...");
  printSensorData(latitude, longitude, myBPM, weight, temperatureC, gasPPM, a);

  // Send data to Blynk
  Serial.println("Sending Data to Blynk...");
  sendDataToBlynk(latitude, longitude, myBPM, weight, temperatureC, gasPPM, a);

  // Wait before sending the next set of data
  delay(20000);
}


void connectToWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
}

void printSensorData(float lat, float lon, int bpm, float weight, float tempC, float gasPPM, sensors_event_t& accel) {
  Serial.print("Latitude= ");
  Serial.print(lat, 6);
  Serial.print(" Longitude= ");
  Serial.println(lon, 6);
  Serial.print("Heart Rate (BPM): ");
  Serial.println(bpm);
  Serial.print("Weight (kg): ");
  Serial.println(weight);
  Serial.print("Temperature (C): ");
  Serial.println(tempC);
  Serial.print("Gas Concentration (PPM): ");
  Serial.println(gasPPM);
  Serial.print("Accel X: ");
  Serial.print(accel.acceleration.x);
  Serial.print(" Accel Y: ");
  Serial.print(accel.acceleration.y);
  Serial.print(" Accel Z: ");
  Serial.println(accel.acceleration.z);
}

void sendDataToBlynk(float lat, float lon, int bpm, float weight, float tempC, float gasPPM, sensors_event_t& accel) {
  Serial.println("Sending Data...");
  Blynk.virtualWrite(V1, lat); // Latitude
  Blynk.virtualWrite(V2, lon); // Longitude
  Blynk.virtualWrite(V3, bpm); // Heart Rate
  Blynk.virtualWrite(V4, tempC); // Temperature
  Blynk.virtualWrite(V5, accel.acceleration.x); // Accelerometer X
  Blynk.virtualWrite(V6, accel.acceleration.y); // Accelerometer Y
  Blynk.virtualWrite(V7, accel.acceleration.z); // Accelerometer Z
  Blynk.virtualWrite(V8, weight); // Weight
  Blynk.virtualWrite(V9, gasPPM); // Gas Concentration

  // Check if data was sent successfully
  if (Blynk.connected()) {
    Serial.println("Data sent successfully to Blynk.");
  } else {
    Serial.println("Error sending data to Blynk.");
  }
}