#include <EEPROM.h>
unsigned int receivedValue = 0;
// Define pins
const int ledPin1 = 9;     // PB0, PWM-capable pin for LED1
const int ledPin2 = 10;     // PB4, pin for LED2
const int buttonMode = 2;  // PB1
const int buttonUp = 3;    // PB2
const int buttonDown = 4;  // PB3

// Variables to store the state of the LEDs, brightness, and blink rate
enum Mode { ALL_OFF, LED1_ON, LED2_ON, LED1_BLINK };
Mode currentMode = ALL_OFF;
unsigned long blinkStartTime = 0;
int brightness = 128; // Initial brightness (range 0-255)
int blinkRate = 1000; // Initial blink rate in milliseconds
const int brightnessStep = 10; // Adjust brightness by this value
const int blinkRateStep = 200; // Adjust blink rate by this value

void setup() {


   Serial.begin(9600);
  // Initialize the LED pins as outputs
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
   //Serial.begin(9600);

  // Initialize the button pins as inputs with internal pull-up resistors
  pinMode(buttonMode, INPUT_PULLUP);
  pinMode(buttonUp, INPUT_PULLUP);
  pinMode(buttonDown, INPUT_PULLUP);

  // Read the last saved brightness and blink rate from EEPROM
 brightness = EEPROM.read(0);
  blinkRate = EEPROM.read(1) * 10;

  // If the values read from EEPROM are not in the valid range, reset to defaults
  if (brightness < 0 || brightness > 255) {
    brightness = 128;
  }
  if (blinkRate < 10 || blinkRate > 2000) {
    blinkRate = 1000;
  }

  // Set initial LED state to all off
  updateLEDs();
}

void loop() {

if (Serial.available()) {
    Serial.println("Data From VC-02");
    // Read the incoming bytes
    byte highByte = Serial.read();
    byte lowByte = Serial.read();

    // Combine the two bytes into a single 16-bit value
    receivedValue = (highByte << 8) | lowByte;

    // Print the received value in HEX format
    Serial.print("Received HEX value: 0x");
    Serial.println(receivedValue, HEX);
  }

  if (receivedValue == 0xA190)  // Check if the value is A2 in HEX
  {
    //myservo.write(90);  // sets the servo position according to the scaled value
    delay(15);
  } 
  else if (receivedValue == 0xA145) {
    //myservo.write(45);  // sets the servo position according to the scaled value
    delay(15);
  }
   else 
   {
  }
  delay(10);
  receivedValue = 0;




  // Check the mode button
  if (digitalRead(buttonMode) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(buttonMode) == LOW) {
      // Cycle through the modes
      if (currentMode == ALL_OFF) {
        currentMode = LED1_ON;
      } else if (currentMode == LED1_ON) {
        currentMode = LED2_ON;
      } else if (currentMode == LED2_ON) {
        currentMode = LED1_BLINK;
      } else {
        currentMode = ALL_OFF;
      }
      updateLEDs();
      while (digitalRead(buttonMode) == LOW); // Wait for button release
    }
  }

  // Handle blinking mode
  if (currentMode == LED1_BLINK) {
    unsigned long currentTime = millis();
    if (currentTime - blinkStartTime >= blinkRate) {
      blinkStartTime = currentTime;
      digitalWrite(ledPin1, !digitalRead(ledPin1));
    }
  }

  // Check the brightness up button
  if (digitalRead(buttonUp) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(buttonUp) == LOW) {
      if (currentMode != LED1_BLINK) {
        // Increase brightness
        brightness = min(255, brightness + brightnessStep);
        updateLEDs();
        EEPROM.write(0, brightness);
      } else {
        // Increase blink rate (decrease delay)
        blinkRate = max(200, blinkRate - blinkRateStep);
        EEPROM.write(1, blinkRate / 10);
      }
      while (digitalRead(buttonUp) == LOW); // Wait for button release
    }
  }

  // Check the brightness down button
  if (digitalRead(buttonDown) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(buttonDown) == LOW) {
      if (currentMode != LED1_BLINK) {
        // Decrease brightness
        brightness = max(0, brightness - brightnessStep);
        updateLEDs();
        EEPROM.write(0, brightness);
      } else {
        // Decrease blink rate (increase delay)
        blinkRate = min(2000, blinkRate + blinkRateStep);
        EEPROM.write(1, blinkRate / 10);
      }
      while (digitalRead(buttonDown) == LOW); // Wait for button release
    }
  }
}

void updateLEDs() {
  switch (currentMode) {
    case LED1_ON:
      analogWrite(ledPin1, brightness);
      digitalWrite(ledPin2, LOW);
      break;
    case LED2_ON:
      analogWrite(ledPin1, 0);
      digitalWrite(ledPin2, HIGH);
      break;
    case LED1_BLINK:
      blinkStartTime = millis(); // Reset blink timer
      digitalWrite(ledPin2, LOW);
      break;
    case ALL_OFF:
      analogWrite(ledPin1, 0);
      digitalWrite(ledPin2, LOW);
      break;
  }
}
                                                                                                       

//**********************************************************************************************//