#include "HX711.h"
#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Wire.h>
#include <Servo.h>








HX711 scale;

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

Servo servo_test;

int potpin = 0;  // analog pin used to connect the potentiometer
int val;    // variable to read the value from the analog pin



const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 31, 33, 35, 37 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 39, 41, 43, 45 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {

  Serial.begin(9600);
  lcd.home();

  servo_test.attach(13);   // attach the signal pin of servo to pin9 of arduino



  

}

void loop() {
  char keypressed = keypad.getKey();

  if (keypressed != NO_KEY) {
    Serial.print(keypressed);
    lcd.print(keypressed);


  }

val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
  val = map(val, 0, 1023, 0, 70 );     // scale it to use it with the servo (value between 0 and 180)
  servo_test.write(val);                  // sets the servo position according to the scaled value
  delay(15); 

}