from machine import Pin, time_pulse_us
import utime

# LED setup
led = Pin(15, Pin.OUT)

# Ultrasonic Sensor Pins
trigger = Pin(3, Pin.OUT)
echo = Pin(2, Pin.IN)

def get_distance():
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(10)
    trigger.low()

    pulse_duration = time_pulse_us(echo, 1, 30000)  # Measure echo time
    distance = (pulse_duration * 0.0343) / 2  # Convert to cm

    return distance

while True:
    distance = get_distance()
    print("Distance:", distance, "cm")
    
    if distance < 10:  # If object is closer than 10cm, turn LED ON
        led.value(1)
    else:
        led.value(0)
    
    utime.sleep(1)  # Wait for 1 second