#include <TinyWireM.h>
#include <Tiny4kOLED.h>
#include <HX711.h>
HX711 loadcell;
int running = false;
void intro() {
  oled.clear();
  oled.on();
  oled.setFont(FONT8X16);
  oled.setCursor(0, 0);
  oled.print("Neraca Digital");
  oled.setCursor(0,2);
  oled.print("Oleh: Kim Bely"); 
  delay(1000);
  oled.clear();
}
void setup() {
  pinMode(4, INPUT_PULLUP);
  oled.begin();
  oled.clear();
  loadcell.begin(3, 1);
  loadcell.set_scale(0.42);
  loadcell.tare();
  loadcell.power_down();
  start();
}
void start() {
  running = true;
  intro();
  loadcell.power_up();
  delay(300);
  loadcell.tare();
}
int lm = 0;
bool btnon = false;
int laston = 0;
int pressed = 0;

void loop() {
  if (running) {
    if (lm > 20) {
      oled.setCursor(0,0);
      oled.print("Neraca coba-coba");
      oled.setCursor(0,2);
      oled.print("Kim");
      oled.setCursor(0, 4);
      int d = loadcell.get_units(10);
      oled.print(d);
      oled.print(" g    ");
      lm = 0;
    }
    lm++;
    if (!btnon && !digitalRead(4)) {
      btnon = true;
      loadcell.tare();
      lm = 21;
      pressed = millis();
    }
    if (btnon && digitalRead(4)) {
      btnon = false;
      loadcell.tare();
      lm = 21;
      return;
    }
    if (btnon && (millis() - pressed) > 4000) {
      oled.off();
      loadcell.power_down();
      running = false;
      btnon = false;
      delay(1000);
    }
    delay(10);
  } else {

    if (!digitalRead(4)) {
      start();
    } else {
    }
  }
}