#define BLYNK_TEMPLATE_ID "TMPL3zhHJvg_9"
#define BLYNK_TEMPLATE_NAME "Cattle Monitoring"
#define BLYNK_AUTH_TOKEN "MkTQK75aigQMT_NLHVtqpzaJZ3uXm5AG"
#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 = ""; // No password needed for Wokwi-GUEST

// Potentiometer (Pulse Sensor)
const int PulseWire = 36; // Use GPIO 36 (ADC1 channel 0)

// 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;

// Define the BPM range
const int BPM_MIN = 50;
const int BPM_MAX = 150;

void setup() {
  Serial.begin(115200);
  ss.begin(9600, SERIAL_8N1, 16, 17); // Serial2 with RX = GPIO16, TX = GPIO17

  // Connect to WiFi
  connectToWiFi();

  // Initialize Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);

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

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

void loop() {
  Blynk.run();

  // Simulate GPS Data (fallback if GPS not available)
  float latitude = 37.7749;  // Example latitude
  float longitude = -122.4194;  // Example longitude

  // 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
  int potValue = analogRead(PulseWire);
  int myBPM = map(potValue, 0, 4095, BPM_MIN, BPM_MAX); // Map the potentiometer value to a BPM range

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

  // Read Temperature Data
  sensors.requestTemperatures();
  float temperatureC = sensors.getTempCByIndex(0);

  // Send individual data points to Blynk
  Blynk.virtualWrite(V1, latitude);
  Blynk.virtualWrite(V2, longitude);
  Blynk.virtualWrite(V3, myBPM);
  Blynk.virtualWrite(V4, temperatureC);
  Blynk.virtualWrite(V5, a.acceleration.x);
  Blynk.virtualWrite(V6, a.acceleration.y);
  Blynk.virtualWrite(V7, a.acceleration.z);

  // 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(1000);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
}