#5 ultrasonic
import machine
import time
trigger_pin = machine.Pin(10, machine.Pin.OUT)
echo_pin = machine.Pin(11, machine.Pin.IN)
def measure_distance():
    trigger_pin.low()
    time.sleep_us(2)
    trigger_pin.high()
    time.sleep_us(10)
    trigger_pin.low()
    while echo_pin.value() == 0:
        time_on = time.ticks_us()
    while echo_pin.value() == 1:
        time_off = time.ticks_us()
    pulse_width = time_off - time_on
    speed_of_sound = 0.0343
    distance = pulse_width * speed_of_sound / 2
    return distance
while True:
    dist = measure_distance()
    print("Distance:", dist, "cm")
    time.sleep(1)