#include <SPI.h>
const int trigPin = 7; // Hubungkan pin trigger sensor ultrasonik ke pin 7
const int echoPin = 8; // Hubungkan pin echo sensor ultrasonik ke pin S

void setup() {
    pinMode(A0, INPUT);
    pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);
    Serial.begin(9600);
    SPI.begin(); // Mulai komunikasi SPI
    Serial.println("CLEARSHEET"); // Bersihkan lembar
    Serial.println("LABEL , Jarak , Data2, Tanggal. Waktu");
}

void loop() {
    int cm = 0; // Reset cm ke 0
    cm = (0.03446 * bacaJarak()) / 2; // Memperbaiki perkalian
    int pot = analogRead(A0);
    
    Serial.print("Data, ");
    Serial.print(cm);
    Serial.print(" , ");
    Serial.print(pot);
    Serial.print(" , ");
    Serial.print("DATE");
    Serial.print(", ");
    Serial.print("TIME");
    Serial.print("");
    delay(1000);
}

int bacaJarak() {
    // Memicu sensor ultrasonik untuk mengirim sinyal
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);

    long duration = pulseIn(echoPin, HIGH); // Memperbaiki 'pulseIn'
    int distance = duration * 0.034 / 2;
    return distance;
}