// https://microcontrollerslab.com/esp32-pinout-use-gpio-pins/
// https://github.com/espressif/arduino-esp32
// https://github.com/espressif/arduino-esp32/tree/master/cores/esp32
// https://github.com/johnrickman/LiquidCrystal_I2C

//--------------------------------------------------
// Includes:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

//--------------------------------------------------
// Globals:

// LCD Objekt Nr 1 erzeugen
// - I2C Adresse: 0x27
// - Zeichen pro Zeile: 16
// - Anzahl Zeilen: 2
LiquidCrystal_I2C myLCD1 = LiquidCrystal_I2C(0x27, 16, 2);

// LCD Objekt Nr 2 erzeugen
// - I2C Adresse: 0x28
// - Zeichen pro Zeile: 16
// - Anzahl Zeilen: 2
LiquidCrystal_I2C myLCD2 = LiquidCrystal_I2C(0x28, 16, 2);

uint32_t gCnt1 = 0;
uint32_t gCnt2 = 0;

//--------------------------------------------------
void setup() {
  // Init USART:
  Serial.begin(115200);

  // Init LCD Nr 1:
  myLCD1.init();
  myLCD1.backlight();

  // Init LCD Nr 2:
  myLCD2.init();
  myLCD2.backlight();
}

//--------------------------------------------------
void loop() {
  // Write LCD Nr 1
  myLCD1.setCursor(0, 0);
  myLCD1.printf("%lu", gCnt1);

  // Write LCD Nr 2
  myLCD2.setCursor(0, 0);
  myLCD2.printf("%lu", gCnt2);

  // Write USART
  Serial.printf("%lu, %lu\n", gCnt1, gCnt2);

  // Inkrement Counter
  gCnt1 = gCnt1 + 1;
  gCnt2 = gCnt2 + 2;

  // Wait 500ms
  delay(500);
}