#include "HX711.h"
#include <HardwareSerial.h>

// Define pin connections
const int trigPin = 18;
const int echoPin = 19;
const int LOADCELL_DOUT_PIN = 26;
const int LOADCELL_SCK_PIN = 27;
#define MQ135_PIN A0
#define RFID_RX_PIN 16
#define RFID_TX_PIN 17
#define GPS_RX_PIN 21
#define GPS_TX_PIN 22
#define CAMERA_RX_PIN 23
#define CAMERA_TX_PIN 25 // Adjusted to avoid GPIO24
#define SIMULATED_5G_RX_PIN 32
#define SIMULATED_5G_TX_PIN 33

// Create instances for additional hardware serial ports
HardwareSerial SerialGPS(1);
HardwareSerial SerialCamera(2);
HardwareSerial Serial5G(3);

HX711 scale;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Initialize ultrasonic sensor pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

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

  // Initialize RFID reader
  Serial2.begin(9600, SERIAL_8N1, RFID_RX_PIN, RFID_TX_PIN);

  // Initialize GPS module
  SerialGPS.begin(9600, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);

  // Initialize Camera module
  SerialCamera.begin(9600, SERIAL_8N1, CAMERA_RX_PIN, CAMERA_TX_PIN);

  // Initialize 5G module
  Serial5G.begin(9600, SERIAL_8N1, SIMULATED_5G_RX_PIN, SIMULATED_5G_TX_PIN);
}

void loop() {
  // Simulate Ultrasonic Sensor
  int distance = simulateUltrasonic();
  Serial.print("Distance: ");
  Serial.println(distance);

  // Simulate Weight Sensor
  long weight = simulateWeight();
  Serial.print("Weight: ");
  Serial.println(weight);

  // Simulate Gas Sensor
  int gasValue = simulateGas();
  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  // Simulate RFID/NFC Reader
  String rfidData = simulateRFID();
  Serial.print("RFID Data: ");
  Serial.println(rfidData);

  // Simulate GPS Module
  String gpsData = simulateGPS();
  Serial.print("GPS Data: ");
  Serial.println(gpsData);

  // Simulate Camera Module
  String cameraData = simulateCamera();
  Serial.print("Camera Data: ");
  Serial.println(cameraData);

  // Simulate 5G Module
  String dataPacket = "Distance: " + String(distance) + ", Weight: " + String(weight) + ", Gas: " + String(gasValue) + ", RFID: " + rfidData + ", GPS: " + gpsData + ", Camera: " + cameraData;
  simulate5GTransmission(dataPacket);

  delay(1000);
}

// Simulated Functions
int simulateUltrasonic() {
  // Generate a random distance between 10 and 100 cm
  return random(10, 101);
}

long simulateWeight() {
  // Generate a random weight between 0 and 1000 grams
  return random(0, 1001);
}

int simulateGas() {
  // Generate a random gas concentration value between 0 and 1023
  return analogRead(MQ135_PIN);
}

String simulateRFID() {
  // Simulate reading a fixed RFID tag data
  return "E2 9A 3C 58";
}

String simulateGPS() {
  // Simulate GPS coordinates
  return "Lat: 37.7749, Long: -122.4194";
}

String simulateCamera() {
  // Simulate placeholder image data
  return "Placeholder Image Data";
}

void simulate5GTransmission(String data) {
  // Simulate data transmission over 5G
  Serial5G.println(data);
}