#include <TinyGPS++.h>
#include <HardwareSerial.h>
#include <Arduino.h>
#include "soc/rtc.h"
#include "HX711.h"

// Create GPS and Serial objects
TinyGPSPlus gps;
HardwareSerial gpsSerial(1); // Use UART1
const int LOADCELL_DOUT_PIN = 4;
const int LOADCELL_SCK_PIN = 2;

HX711 scale;

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  Serial.println("GPS Neo-6M with ESP32");

  // Initialize UART1 for GPS
  gpsSerial.begin(9600, SERIAL_8N1, 16, 17); // RX = GPIO16, TX = GPIO17

  while (!Serial);       // Wait for the Serial connection to establish (if required)
  delay(2000);           // Allow Serial Monitor to initialize

  rtc_cpu_freq_config_t config;
  rtc_clk_cpu_freq_get_config(&config);
  rtc_clk_cpu_freq_set_config_fast(&config);  // Retain clock frequency

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);  // Initialize HX711

  // Set the scale factor here (calculated during calibration)
  scale.set_scale(419);  

  scale.tare();  // Zero the scale to remove any offset
  Serial.println("Scale initialized. You can now measure weight.");
}

void loop() {
  // Read data from GPS module
  while (gpsSerial.available() > 0) {
    char c = gpsSerial.read();
    if (gps.encode(c)) {
      // If new data is available, print it
      displayGPSData();
    }
  }
    if (scale.is_ready()) {  // Ensure HX711 is ready
    float weight = scale.get_units(10);  // Average of 10 readings for stability
    Serial.print("Measured Weight: ");
    Serial.print(weight);
    Serial.println(" grams");
  } else {
    Serial.println("HX711 not found. Please check connections.");
  }
  delay(1000);
}

// Function to display GPS data
void displayGPSData() {
  if (gps.location.isUpdated()) {
    Serial.print("Latitude: ");
    Serial.print(gps.location.lat(), 6);
    Serial.print(", Longitude: ");
    Serial.println(gps.location.lng(), 6);
  }

  if (gps.date.isUpdated()) {
    Serial.print("Date: ");
    Serial.print(gps.date.day());
    Serial.print("/");
    Serial.print(gps.date.month());
    Serial.print("/");
    Serial.println(gps.date.year());
  }

  if (gps.time.isUpdated()) {
    Serial.print("Time: ");
    Serial.print(gps.time.hour());
    Serial.print(":");
    Serial.print(gps.time.minute());
    Serial.print(":");
    Serial.println(gps.time.second());
  }
}