// Esp32 S3 and two I2C buses with Adafruit SSD1306 library (Two OLED 128x64 displays)
// Forum: https://forum.arduino.cc/t/esp32-s3-and-two-i2c-buses-with-adafruit-ssd1306-library-two-oled-128x64-displays/1290094
// Sketch by user: marko-2347
// This Wokwi project: https://wokwi.com/projects/405730495697247233

//CARA PENGGUNAAN :
//1. Tombol 1 >>> Jumlah pembelian Rail A = 0
//2. Tombol 2 >>> Jumlah pembelian Rail A = 1
//3. Tombol 3 >>> Jumlah pembelian Rail A = 2
//4. Tombol A >>> Jumlah pembelian Rail A = 3

//5. Tombol 4 >>> Jumlah pembelian Rail B = 0
//6. Tombol 5 >>> Jumlah pembelian Rail B = 1
//7. Tombol 6 >>> Jumlah pembelian Rail B = 2
//8. Tombol B >>> Jumlah pembelian Rail B = 3

//9. Tombol * >>> Submit order ke API Server 
//10. Tombol # >>> Konfirmasi pembayaran (Jika status Pembayaran "Berhasil" maka masing2 Servo akan bergerak mengeluarkan produk sesuai jumlah yang di order)

// OLED
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Keypad.h>
#include <Stepper.h>

//Define pins OLED
#define I2C_A_SDA 1 // GPIO1
#define I2C_A_SCL 2 // GPIO2

#define I2C_B_SDA 42 // GPIO42
#define I2C_B_SCL 41 // GPIO41

const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
const int stepsPerRevolution2 = 200;  // change this to fit the number of steps per revolution
// for your motor

// initialize the stepper library on pins
Stepper myStepper(stepsPerRevolution, 19, 20, 21, 47);
Stepper myStepper2(stepsPerRevolution2, 35, 36, 37, 38);


// OLED parameters
#define SCREEN_WIDTH 128     // OLED display width, in pixels
#define SCREEN_HEIGHT 64     // OLED display height, in pixels
#define OLED_RESET -1        // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C  // Change if required
#define ROTATION 0           // Rotates text on OLED 1=90 degrees, 2=180 degrees


// Define display object
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_SSD1306 display2(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire1, OLED_RESET);

// Inisialisasi keypad
const byte ROWS = 4; //jumlah baris pada keypad
const byte COLS = 4; //jumlah kolom pada keypad
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {18, 17, 16, 15}; //sesuaikan pinnya sesuai dengan koneksi Anda
byte colPins[COLS] = {7, 6, 5, 4}; //sesuaikan pinnya sesuai dengan koneksi Anda
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

int harga = 5000;
int harga2 = 10000;

int jumlah = 0;
int jumlah2 = 0;

int ammount = 0;
int ammount2 = 0;

int total_ammount = 0;

int R1 = 0;
int R2 = 0;

void setup() {

  Serial.begin(115200);
  while (!Serial)
    ;
   Wire.begin(I2C_A_SDA, I2C_A_SCL);
   Wire1.begin(I2C_B_SDA, I2C_B_SCL);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("Display1 SSD1306 allocation failed"));
    for (;;)
      ;  // Don't proceed, loop forever
  }
  
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!display2.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("Display2 SSD1306 allocation failed"));
    for (;;)
      ;  // Don't proceed, loop forever
  }

// Show splash screen
  display.display();
  display2.display();
  delay(2000); // Pause for 2 seconds

// Display settings
  display.clearDisplay();
  display.setTextSize(2);             // Normal 1:1 pixel scale
  display.setTextColor(WHITE);        // Draw white text
  display.setRotation(ROTATION);      // Set screen rotation
  display.setCursor(0,0);             // Start at top-left corner
  display.print("Rail A x 0");
  display.setCursor(0,24);             // Start at top-left corner
  display.print("Rp ");
  display.print(ammount);
  display.display();

  // Display settings
  display2.clearDisplay();
  display2.setTextSize(2);             // Normal 1:1 pixel scale
  display2.setTextColor(WHITE);        // Draw white text
  display2.setRotation(ROTATION);      // Set screen rotation
  display2.setCursor(0,0);             // Start at top-left corner
  display2.print("Rail B x 0");
  display2.print("Rp ");
  display2.print(ammount2);
  display2.display();

  // set the speed at 60 rpm:
  myStepper.setSpeed(60);
  myStepper2.setSpeed(60);

}


void loop() {

  char key = keypad.getKey();

  if (key == '1') {

    jumlah = 0;
    ammount = harga * jumlah;
    total_ammount = ammount + ammount2;

    // Display settings
    display.clearDisplay();
    display.setTextSize(2);             // Normal 1:1 pixel scale
    display.setTextColor(WHITE);        // Draw white text
    display.setRotation(ROTATION);      // Set screen rotation
    display.setCursor(0,0);             // Start at top-left corner
    display.print("Rail A x ");
    display.print(jumlah);
    display.setCursor(0,24);             // Start at top-left corner
    display.print("Rp ");
    display.print(ammount);
    display.display();
  }

  if (key == '2') {

    jumlah = 1;
    ammount = harga * jumlah;
    total_ammount = ammount + ammount2; 

    // Display settings
    display.clearDisplay();
    display.setTextSize(2);             // Normal 1:1 pixel scale
    display.setTextColor(WHITE);        // Draw white text
    display.setRotation(ROTATION);      // Set screen rotation
    display.setCursor(0,0);             // Start at top-left corner
    display.print("Rail A x ");
    display.print(jumlah);
    display.setCursor(0,24);             // Start at top-left corner
    display.print("Rp ");
    display.print(ammount);
    display.display();

  }

  if (key == '3') {

    jumlah = 2;
    ammount = harga * jumlah;
    total_ammount = ammount + ammount2;

    // Display settings
    display.clearDisplay();
    display.setTextSize(2);             // Normal 1:1 pixel scale
    display.setTextColor(WHITE);        // Draw white text
    display.setRotation(ROTATION);      // Set screen rotation
    display.setCursor(0,0);             // Start at top-left corner
    display.print("Rail A x ");
    display.print(jumlah);
    display.setCursor(0,24);             // Start at top-left corner
    display.print("Rp ");
    display.print(ammount);
    display.display();

  }

  if (key == 'A') {

    jumlah = 3;
    ammount = harga * jumlah;
    total_ammount = ammount + ammount2;

    // Display settings
    display.clearDisplay();
    display.setTextSize(2);             // Normal 1:1 pixel scale
    display.setTextColor(WHITE);        // Draw white text
    display.setRotation(ROTATION);      // Set screen rotation
    display.setCursor(0,0);             // Start at top-left corner
    display.print("Rail A x ");
    display.print(jumlah);
    display.setCursor(0,24);             // Start at top-left corner
    display.print("Rp ");
    display.print(ammount);
    display.display();
  }

  if (key == '4') {

    jumlah2 = 0;
    ammount2 = harga2 * jumlah2;
    total_ammount = ammount + ammount2;

    // Display settings
    display2.clearDisplay();
    display2.setTextSize(2);             // Normal 1:1 pixel scale
    display2.setTextColor(WHITE);        // Draw white text
    display2.setRotation(ROTATION);      // Set screen rotation
    display2.setCursor(0,0);             // Start at top-left corner
    display2.print("Rail B x ");
    display2.print(jumlah2);
    display2.setCursor(0,24);             // Start at top-left corner
    display2.print("Rp ");
    display2.print(ammount2);
    display2.display();
  }

  if (key == '5') {

    jumlah2 = 1;
    ammount2 = harga2 * jumlah2;
    total_ammount = ammount + ammount2;

    // Display settings
    display2.clearDisplay();
    display2.setTextSize(2);             // Normal 1:1 pixel scale
    display2.setTextColor(WHITE);        // Draw white text
    display2.setRotation(ROTATION);      // Set screen rotation
    display2.setCursor(0,0);             // Start at top-left corner
    display2.print("Rail B x ");
    display2.print(jumlah2);
    display2.setCursor(0,24);             // Start at top-left corner
    display2.print("Rp ");
    display2.print(ammount2);
    display2.display();
  }

  if (key == '6') {

    jumlah2 = 2;
    ammount2 = harga2 * jumlah2;
    total_ammount = ammount + ammount2;

    // Display settings
    display2.clearDisplay();
    display2.setTextSize(2);             // Normal 1:1 pixel scale
    display2.setTextColor(WHITE);        // Draw white text
    display2.setRotation(ROTATION);      // Set screen rotation
    display2.setCursor(0,0);             // Start at top-left corner
    display2.print("Rail B x ");
    display2.print(jumlah2);
    display2.setCursor(0,24);             // Start at top-left corner
    display2.print("Rp ");
    display2.print(ammount2);
    display2.display();
  }

  if (key == 'B') {

    jumlah2 = 3;
    ammount2 = harga2 * jumlah2;
    total_ammount = ammount + ammount2;

    // Display settings
    display2.clearDisplay();
    display2.setTextSize(2);             // Normal 1:1 pixel scale
    display2.setTextColor(WHITE);        // Draw white text
    display2.setRotation(ROTATION);      // Set screen rotation
    display2.setCursor(0,0);             // Start at top-left corner
    display2.print("Rail B x ");
    display2.print(jumlah2);
    display2.setCursor(0,24);             // Start at top-left corner
    display2.print("Rp ");
    display2.print(ammount2);
    display2.display();
  }

  if (key == '*') {

     // Display settings
    display.clearDisplay();
    display.setTextSize(2);             // Normal 1:1 pixel scale
    display.setTextColor(WHITE);        // Draw white text
    display.setRotation(ROTATION);      // Set screen rotation
    display.setCursor(0,0);             // Start at top-left corner
    display.print("BAYAR !!!");
    display.setCursor(0,24);             // Start at top-left corner
    display.print("Rp ");
    display.print(total_ammount);
    display.display();

    // Display settings
    display2.clearDisplay();
    display2.setTextSize(2);             // Normal 1:1 pixel scale
    display2.setTextColor(WHITE);        // Draw white text
    display2.setRotation(ROTATION);      // Set screen rotation
    display2.setCursor(0,0);             // Start at top-left corner
    display2.print("BAYAR !!!");
    display2.setCursor(0,24);             // Start at top-left corner
    display2.print("Rp ");
    display2.print(total_ammount);
    display2.display();
  }

  if (key == '#') {

    for (R1 = 0; R1 < jumlah; R1++) {
      // step one revolution  in one direction:
      Serial.println("motor1");
      myStepper.step(stepsPerRevolution);
      delay(500);

      // Display settings
      display.clearDisplay();
      display.setTextSize(2);             // Normal 1:1 pixel scale
      display.setTextColor(WHITE);        // Draw white text
      display.setRotation(ROTATION);      // Set screen rotation
      display.setCursor(0,0);             // Start at top-left corner
      display.print("SABAR ...");
      display.setCursor(0,24);             // Start at top-left corner
      display.print(R1);
      display.display();
    }

    for (R2 = 0; R2 < jumlah2; R2++) {
      Serial.println("motor2");
      myStepper2.step(stepsPerRevolution2);
      delay(500);

      // Display settings
      display2.clearDisplay();
      display2.setTextSize(2);             // Normal 1:1 pixel scale
      display2.setTextColor(WHITE);        // Draw white text
      display2.setRotation(ROTATION);      // Set screen rotation
      display2.setCursor(0,0);             // Start at top-left corner
      display2.print("Sabar ...");
      display2.setCursor(0,24);             // Start at top-left corner
      display2.print(R2);
      display2.display();
    }    
  }
}