Encoder Display rev_06

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    - Project: Encoder Display
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2025-07-15 23:22:17

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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 *****/
// Corrected pin naming to avoid invalid characters
const uint8_t encoder_KY040_CLK_PIN_D2 = 2;
const uint8_t encoder_KY040_DT_PIN_D3 = 3;
const uint8_t encoder_KY040_SW_PIN_D4 = 4;

/***** DEFINITION OF I2C PINS *****/
const uint8_t angleDisplay_LCD1602I2C_SDA = A4;
const uint8_t angleDisplay_LCD1602I2C_SCL = A5;
const uint8_t angleDisplay_LCD1602I2C_SLAVE_ADDRESS = 39;

/***** LIBRARY CLASS INSTANCES *****/
// Instantiate the encoder object with the pins
SimpleEncoder encoder(encoder_KY040_CLK_PIN_D2, encoder_KY040_DT_PIN_D3, encoder_KY040_SW_PIN_D4);

// Instantiate the LCD object with the I2C address and dimensions
LCDIC2 lcd(angleDisplay_LCD1602I2C_SLAVE_ADDRESS, 16, 2);

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

  // Initialize the LCD
  if (lcd.begin()) {
    lcd.clear();
    lcd.print("Angle:");
  }

  // Configure encoder pins
  pinMode(encoder_KY040_CLK_PIN_D2, INPUT);
  pinMode(encoder_KY040_DT_PIN_D3, INPUT);
  pinMode(encoder_KY040_SW_PIN_D4, INPUT_PULLUP);
}

void loop(void)
{
  // Read the encoder's rotational angle in degrees
  float angleDegrees = encoder.getValue() * 360.0; // Assuming getValue() returns number of steps

  // Normalize the angle to 0-360 degrees
  if (angleDegrees < 0) {
    angleDegrees += 360.0;
  } else if (angleDegrees >= 360.0) {
    angleDegrees -= 360.0;
  }

  // Display the angle on the LCD
  lcd.setCursor(0, 1);
  lcd.print("Angle:");
  lcd.print(angleDegrees, 1); // One decimal place
  lcd.print((char)223); // Degree symbol
  lcd.print(" ");

  // Optional: print to serial for debugging
  Serial.print("Angle: ");
  Serial.print(angleDegrees, 1);
  Serial.println(" degrees");

  delay(100); // Small delay for stability
}