from machine import Pin, time_pulse_us,PWM
import time

echoPin = Pin(18, Pin.IN)
trigPin = Pin(5, Pin.OUT)
# Function to measure distance
def measure_distance():
    trigPin.off()
    time.sleep_us(2)
    trigPin.on()
    time.sleep_us(10)
    trigPin.off()
    
    duration = time_pulse_us(echoPin, 1)
    distance = (duration * 0.034) / 2
    
    return distance

# Main loop
while True:
    distance = measure_distance()
    print('Distance:', distance, 'cm')