// ===== MOVING AVERAGE FILTER =====
#include <Arduino.h>

#define WINDOW_SIZE 10      // Jumlah data yang dirata-ratakan
#define SAMPLE_INTERVAL 100 // Waktu jeda antar pembacaan (ms)

int rawData[WINDOW_SIZE];   // Buffer data
int bufferIndex = 0;
int sum = 0;

void setup() {
  Serial.begin(115200);
  randomSeed(analogRead(0)); // Untuk nilai acak yang bervariasi
  for (int i = 0; i < WINDOW_SIZE; i++) rawData[i] = 0;
}

void loop() {
  int newValue = random(0, 101); // Simulasi data sensor acak 0–100

  // Update buffer
  sum -= rawData[bufferIndex];      // Kurangi nilai lama
  rawData[bufferIndex] = newValue;  // Masukkan nilai baru
  sum += newValue;                  // Tambah nilai baru
  bufferIndex = (bufferIndex + 1) % WINDOW_SIZE; // Rotasi index buffer

  // Hitung Moving Average
  float movingAverage = (float)sum / WINDOW_SIZE;

  // Tampilkan hasil
  Serial.print("Raw: ");
  Serial.print(newValue);
  Serial.print(" | Moving Avg: ");
  Serial.println(movingAverage);

  delay(SAMPLE_INTERVAL);
}