// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//     ESP32-S3 44pin, connected to OLED display, latching pin for LED or 2 language select with one button  
//
//     Hardware: ESP32-S3 44pin, OLED Display 128x64 I2C,  
//     External libraries: U8g2lib.h
//     Processor selection in Arduino IDE:  ESP32S3 Dev Module
//     Possible  Touch Pins for ESP32S3 with 44 pins:  GPIO #:	1  2  3  4  5  6  7  8  9 10 11 12 13 14
//     Possible  Output Pins for ESP32S3 with 44 pins: GPIO #:	3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 46
//                                                              0  1  2 19 20 21 35 36 37 38 39 40 41 42 43 44 45 47 48   48 (or38?): internal RGB LED
//     What it does: 
//     - 
//     -  
//     to be added:     - 
//     -                - 
//     - 
//     21.01.24 last (start dec. 2023)
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

#include <U8g2lib.h>                          // library for OLED, e.g. 128x64 monochrome
U8G2_SSD1306_128X64_NONAME_F_HW_I2C oled(U8G2_R0);  // for WOKWI with hardware I2C pins 8 SDA and 9 SCL

const int buttonPin = 15;
const int ledPin = 5;
//int buttonState = 0;                        // starting value, button not pressed
//float cursor = 3.4321;                      // variable to play with...
int arrayPointer = -1;                        // starting value for array position ( "0" is first menu item, so "-1" will start with first menu name)

String arrayStation[8] = 
{
  "Mega Shuffle",
  "WayUp Radio",
  "Asia Dream",
  "KPop Radio",
  "Classic FM",
  "Lite Favorites",
  "MAXXED Out",
  "SomaFM Xmas"
};

//const int numCh = sizeof(arrayStation)/sizeof(char *);   // ?
String station = arrayStation[arrayPointer];


void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);           // pin set HIGH, goes LOW if pressed

  oled.begin();                               // begin U8g2lib.h named "oled" for OLED 128x64
  oled.clearBuffer();                         // clear buffer for storing display content in RAM
  //oled.setContrast(200);                    // brightness of OLED, 0..255
  //oled.setDrawColor(1);                     // ??? set color to white
  oled.setFont(u8g2_font_nerhoe_tr);          // set font
  oled.setCursor(0,10);
  oled.print("Switch Station with button");      // oled.print a string instead of oled.drawStr 
  oled.sendBuffer();
  delay(1000);
  /*
  oled.setFont(u8g2_font_nerhoe_tr);          // set font
  oled.setFont(u8g2_font_profont11_tr);       // set font for small digits
  oled.setFont(u8g2_font_profont10_tr);       // font for the small label, e.g. "POWER"
  */
}

void loop() 
{
  //buttonState = digitalRead(buttonPin);       // was the button pressed?

  if (digitalRead(buttonPin) ==  LOW)           // Button B defined as INPUT_PULLUP, LOW means pressed
  { oled.clearBuffer();
    arrayPointer = (arrayPointer + 1);          // raise arrayPointer (station#) by 1 -> too many characters shown, repeating name!
    //arrayPointer = (arrayPointer + 1) % numCh;  // raise arrayPointer (station#) by 1  % modulo numCh?
    if (arrayPointer > 7)                       // ... if over 7, then...
      { arrayPointer = 0; }                     // ... set to 0, restart at top of array
    station = arrayStation[arrayPointer];       // station gets next station name
    oled.setFont(u8g2_font_nerhoe_tr);          // set font
    oled.setCursor(0,10);
    oled.print("Station:");                     // oled.print a string instead of oled.drawStr 
    oled.setCursor(10,30);
    //oled.print(station);                        // oled.print a string instead of oled.drawStr 
    oled.print(arrayStation[arrayPointer]);     // oled.print a string instead of oled.drawStr 
    oled.setFont(u8g2_font_profont11_tr);       // set font for small digits
    oled.setCursor(10,50);
    oled.println(arrayPointer);                 // oled.print a variable 
    oled.setCursor(30,50);
    oled.print(sizeof(arrayStation));           // oled.print a variable 
    oled.sendBuffer();                          // send buffer from RAM to display controller
    delay(1000);
    
  }
  
}





/*
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//     ESP32-S3 44pin, connected to OLED display, latching pin for LED or 2 language select with one button  
//
//     Hardware: ESP32-S3 44pin, OLED Display 128x64 I2C,  
//     External libraries: U8g2lib.h
//     Processor selection in Arduino IDE:  ESP32S3 Dev Module
//     Possible  Touch Pins for ESP32S3 with 44 pins:  GPIO #:	1  2  3  4  5  6  7  8  9 10 11 12 13 14
//     Possible  Output Pins for ESP32S3 with 44 pins: GPIO #:	3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 46
//                                                              0  1  2 19 20 21 35 36 37 38 39 40 41 42 43 44 45 47 48   48 (or38?): internal RGB LED
//     What it does: 
//     - 
//     -  
//     to be added:     - 
//     -                - 
//     - 
//     21.01.24 last (start dec. 2023)
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


// **************************************************************************************************
//                                  D E F I N I T I O N S                                           *
// **************************************************************************************************

#include <U8g2lib.h>                          // library for OLED, e.g. 128x64 monochrome
U8G2_SSD1306_128X64_NONAME_F_HW_I2C oled(U8G2_R0);  // for WOKWI with hardware I2C pins 8 SDA and 9 SCL


const int buttonPin = 15;
const int ledPin = 5;

int buttonState = 0;                          // variable definition with starting value 0
float cursor = 3.4321;                        // variable to play with...

// **************************************************************************************************
//                                        S E T U P                                                 *
// **************************************************************************************************
void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);           // pin set HIGH, goes LOW if pressed

  oled.begin();                               // begin U8g2lib.h named "oled" for OLED 128x64
  oled.clearBuffer();                         // clear buffer for storing display content in RAM
  oled.setFont(u8g2_font_nerhoe_tr);          // set font
  //oled.setFont(u8g2_font_profont11_tr);     // set font for small digits
  //oled.setFont(u8g2_font_profont10_tr);     // font for the small label, e.g. "POWER"
  //oled.setDrawColor(1);                     // ??? set color to white
  oled.drawStr(0, 10, "Display test in Setup...");       // write some stuff
  oled.drawStr(0, 20, "Font: nerhoe_tr");     // write some stuff
  oled.setFont(u8g2_font_profont11_tr);       // set font for small digits
  oled.drawStr(0, 40, "Font: profont11_tr");  // write some stuff
  oled.setFont(u8g2_font_profont10_tr);       // font for the small label, e.g. "POWER"
  oled.drawStr(0, 50, "Font: profont10_tr");  // write some stuff
  oled.setCursor(40,64);
  oled.print("Value:");                       // oled.print a string instead of oled.drawStr 
  oled.setCursor(80,64);
  oled.print(cursor, 2);                      // oled.print a variable 
  oled.sendBuffer();                          // send buffer from RAM to display controller
  delay(2000);
  
}

// **************************************************************************************************
//                                      F U N C T I O N S                                           *
// **************************************************************************************************



// **************************************************************************************************
//                                          L O O P                                                 *
// **************************************************************************************************
void loop() 
{
  buttonState = digitalRead(buttonPin);       // was the button pressed?

  if (buttonState == LOW)                     // if button pressed (LOW) set ledPin from 0->1 or 1->0
  { digitalWrite(ledPin, !digitalRead(ledPin));    // toggle the LED state
    delay(200);                               // debounce was 150 ms, better in Wokwi with 200, unstable <150
  }

  if (digitalRead(ledPin) == LOW)             // if button pressed (LOW) set buttonState HIGH
  { oled.clearBuffer();                       // clear buffer for storing display content in RAM
    oled.setFont(u8g2_font_nerhoe_tr);        // set font
    oled.drawStr(0, 10, "Loop: Deutsch...");  // write some stuff
    oled.sendBuffer();                        // send buffer from RAM to display controller
  }
  else 
  { oled.clearBuffer();                       // clear buffer for storing display content in RAM
    oled.setFont(u8g2_font_nerhoe_tr);        // set font
    oled.drawStr(0, 50, "Loop: English...");  // write some stuff
    oled.sendBuffer();                        // send buffer from RAM to display controller
  }

}
*/