#include <TinyWireM.h>
#include <Tiny4kOLED.h>
#include <HX711.h>
HX711 loadcell;
//#include <HX711_ADC.h>
//HX711_ADC LoadCell(3, 1);
const long LOADCELL_OFFSET = 50682624;
const long LOADCELL_DIVIDER = 5895655;
int running = false;
void intro() {
  oled.clear();
  oled.on();
  oled.setFont(FONT8X16);
  oled.setCursor(0, 0);
  oled.print("Digital scale");
  
  delay(1000);
  oled.clear();
}
void setup() {
  // put your setup code here, to run once:
  pinMode(4, INPUT_PULLUP);
  oled.begin();
  oled.clear();

  loadcell.begin(3, 1);
  loadcell.set_scale(0.42);
  //loadcell.set_offset(2100);
  loadcell.tare();
  loadcell.power_down();
  //LoadCell.begin(); 
  //LoadCell.start(1000);
  //LoadCell.setCalFactor(0.42);
  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() {
  // put your main code here, to run repeatedly:
  if (running) {
    if (lm > 20) {
    oled.setCursor(0, 4);
    //LoadCell.update(); 
    int d = loadcell.get_units(10); 
    //oled.print(millis());
    oled.print(d);
    oled.print("g    ");
    lm = 0;
    }
    lm++;
    if (!btnon && !digitalRead(4)) {
      btnon = true;
      //laston = millis();
      loadcell.tare();
      lm = 21;
      pressed = millis();
    }
    if (btnon && digitalRead(4)) {
      //if (millis() - laston > 2) {
        btnon = false;
        loadcell.tare();
        lm = 21;
        return;
      /*} else {
        laston = millis();
      }*/
    }
    if (btnon && (millis() - pressed) > 4000) {
      oled.off();
      loadcell.power_down();
      running = false;
      btnon = false;
      delay(1000);
    }
    delay(10);
    //oled.clear();
  } else {
    
    if (!digitalRead(4)) {
      //delay(100);
      //if (digitalRead(4)) return;
      start();
    } else {
      //delay(1000);
    }

  }
}