import machine as gpio
import utime as TM

trigger_Pin = gpio.Pin(14,gpio.Pin.OUT)
echo_Pin = gpio.Pin(15,gpio.Pin.IN)

def measure_distanse():
    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
 return distance_cm

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