#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define CLK_PIN 13
#define DATA_PIN 11
#define CS_PIN 10
#define scrollSpeed 70
#define scrollPause 0

MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
textEffect_t scrollEffect = PA_SCROLL_LEFT;
textPosition_t scrollAllign = PA_LEFT;

#define BUF_SIZE 75
#define trigPin A0
#define echoPin A1

char testStr[10] = {""};
String heightStr = "";
long duration;
int distance;
int height;

void setup() {
  pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);
      Serial.begin(9600);
        P.begin();
        }

        void loop() {
          measure();

            if (distance > 50) {
                Serial.println(distance);
                    P.displayText("TINGGI", PA_LEFT, 0, 0, PA_PRINT, PA_NO_EFFECT);
                      }
                        else {
                             Serial.println(distance);
                                 height = 180 - distance;
                                     heightStr = String(height, DEC) + "cm";
                                         heightStr.toCharArray(testStr, 75);
                                             P.displayText(testStr, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
                                               }
                                                 P.displayAnimate();
                                                   delay(100);
                                                   }

                                                   void measure() {

                                                     digitalWrite(trigPin, LOW);
                                                       delayMicroseconds(2);
                                                         digitalWrite(trigPin, HIGH);
                                                           delayMicroseconds(10);
                                                             digitalWrite(trigPin, LOW);

                                                               duration = pulseIn(echoPin, HIGH);
                                                                 distance = duration * 0.017;
                                                                 }