import machine as gpio
import utime as TM
import machine as Pin

trigger_Pin = gpio.pin(14, gpio.Pin.OUT)
echo_Pin = gpio.Pin(15, gpio.Pin.In)
led = Pin(9,gpio.Pin.OUT)

distance_cm = 0

def measure_distance():
    trigger_Pin.value(1)
    TM.sleep_us(10)
    trigger_Pin.value(0)

while echo_Pin.value() == 0:
    pass
start_time = TM.ticks_us()

while echo_Pin.value() == 1:
    pass
end_time = TM.ticks_us()

pulse_duration = TM.ticks_diff(end_time,start_time)
distance_cm = (pulse_duration/2)/29.1
if (distance_cm>100):
    led.value(1)
else:
    led.value(0)
 return distance_cm

while True:
    distance_cm = measure_distance()
    print("Distance:{:.2f} cm".format(distance_cm))
    TM.sleep(1)