from machine import Pin,time_pulse_us
import time
trig=Pin(1,Pin.OUT)
echo=Pin(2,Pin.IN)
rled=Pin(15,Pin.OUT)
gled=Pin(14,Pin.OUT)
buzz=Pin(16,Pin.OUT)
def distance():
trig.low()
time.sleep_us(2)
trig.high()
time.sleep_us(10)
trig.low()
dur=time_pulse_us(echo,1,30000)
dist=(dur*0.0343)/2
return dist
while True:
d=distance()
print("Distance:",d)
if d<7:
gled.value(0)
rled.value(1)
buzz.value(1)
print("Too close")
time.sleep_us(5)
else:
rled.value(0)
gled.value(1)