void setup() {
Serial.begin(115200);
Serial.println("Practical Test 1: Short Questions (Friday)");
Serial.println("  1. Press the button to turn OFF the blue LED");
Serial.println("  2. Periodically print the raw value of the potential meter");
Serial.println("  3. If the raw count <2000, turn ON the red LED");
pinMode(32, INPUT_PULLUP);  // Button
pinMode(14, INPUT);       // Blue LED
pinMode(23, OUTPUT);       // Red LED
pinMode(19, OUTPUT);        // Potentiometer 
}

void loop() {
  // 1. Button control for blue LED
int buttonState = digitalRead(32);
if (buttonState == LOW) { // Button is pressed (active low due to pull-up)
digitalWrite(23, LOW); // Turn off blue LED
 } else {
digitalWrite(23, HIGH); // Turn on blue LED when button is not pressed
 }
 
  // 2. Read and print potentiometer value periodically
int potValue = analogRead(14);
static unsigned long lastPrintTime = 0;
if (millis() - lastPrintTime >= 500) {  // Print every 500ms
  Serial.print("Potentiometer raw value: ");
  Serial.println(potValue);
  lastPrintTime = millis();
}
  
  // 3. Control red LED based on potentiometer value (<2000)
if (potValue < 2000) {
digitalWrite(19, HIGH);  // Turn ON red LED
} else {
digitalWrite(19, LOW);   // Turn OFF red LED
}
  
delay(500); // Print and check every 500ms
 }