from machine import Pin, PWM

# Step 1: Set up the LED on GPIO Pin 5 with PWM
led = PWM(Pin(5))
led.freq(1000)  # Set the frequency to 1kHz (this controls how fast the LED blinks)

while True:
    try:
        # Step 2: Get user input for brightness (0 to 100)
        value = input("Enter brightness (0-100): ")

        # Step 3: Convert the input value to an integer and scale it to PWM duty cycle range (0-65535)
        brightness = int(value)
        if brightness < 0: brightness = 0
        if brightness > 100: brightness = 100
        
        # Step 4: Convert brightness (0-100) to PWM duty cycle (0-65535)
        duty = int(brightness * 65535 / 100)
        
        # Step 5: Set the LED brightness by adjusting the PWM duty cycle
        led.duty_u16(duty)
    except:
        print("Invalid input")