Encoder Display rev_07

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    - Project: Encoder Display
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2025-07-15 23:23:57

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Capture the rotational angle in degrees from the */
    /* KY-040 rotary encoder and show the result on an */
    /* LCD screen through I2C communication, leveraging */
    /* the SimpleEncoder library. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <SimpleEncoder.h> // http://github.com/EasyG0ing1/SimpleEncoder
#include <LCDIC2.h>        // https://github.com/offcircuit/LCDIC2

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t encoder_KY_040_CLK_PIN_D2 = 2;
const uint8_t encoder_KY_040_DT_PIN_D3 = 3;
const uint8_t encoder_KY_040_SW_PIN_D4 = 4;

/***** DEFINITION OF I2C PINS *****/
const uint8_t angleDisplay_LCD1602I2C_I2C_PIN_SDA_A4 = A4;
const uint8_t angleDisplay_LCD1602I2C_I2C_PIN_SCL_A5 = A5;
const uint8_t angleDisplay_LCD1602I2C_I2C_SLAVE_ADDRESS = 39;

/***** LIBRARY CLASS INSTANCES *****/
// Instantiate the LCD display object with the I2C address
LCDIC2 lcd(angleDisplay_LCD1602I2C_I2C_SLAVE_ADDRESS);

// Instantiate the SimpleEncoder object with the encoder pins
SimpleEncoder encoder(encoder_KY_040_SW_PIN_D4, encoder_KY_040_CLK_PIN_D2, encoder_KY_040_DT_PIN_D3);

void setup(void)
{
  // Initialize serial communication for debugging (optional)
  Serial.begin(9600);

  // Initialize the LCD display
  if (lcd.begin()) {
    lcd.clear();
    lcd.setBacklight(1); // Turn on backlight
    lcd.setCursor(0, 0);
    lcd.print("Rotational Angle");
  }

  // Configure encoder pins
  pinMode(encoder_KY_040_CLK_PIN_D2, INPUT);
  pinMode(encoder_KY_040_DT_PIN_D3, INPUT);
  pinMode(encoder_KY_040_SW_PIN_D4, INPUT_PULLUP);
}

void loop(void)
{
  // Update the encoder state
  encoder.tick();

  // Calculate the angle in degrees based on the encoder's count
  // Assuming the encoder count ranges from 0 to 360 for a full rotation
  // If the encoder count is not in degrees, convert accordingly
  float angleDegrees = encoder.VALUE; // The encoder.VALUE provides the current count

  // Display the angle on the LCD
  lcd.setCursor(0, 1);
  lcd.print("Angle: ");
  lcd.print(angleDegrees);
  lcd.print(" deg   "); // Extra spaces to clear previous longer values

  // Optional: Print to Serial for debugging
  Serial.print("Encoder Count: ");
  Serial.println(angleDegrees);

  // Small delay to prevent flickering
  delay(100);
}