from machine import Pin
import time
import dht

trig = Pin(7, Pin.OUT)
echo = Pin(8, Pin.IN)

led = Pin(3, Pin.OUT)
buzzer = Pin(14, Pin.OUT)

sensor = dht.DHT22(Pin(27))

def get_temp():
    sensor.measure()
    temp = sensor.temperature()
    time.sleep(2)
    return temp

def get_distance():
    trig.value(0)
    time.sleep_us(2)
    trig.value(1)
    time.sleep_us(10)
    trig.value(0)

    while echo.value() == 0:
        start_time = time.ticks_us()
    while echo.value() == 1:
        end_time = time.ticks_us()

    duration = end_time - start_time
    duration /= 1_000_000   
    duration /= 2           

    temp = get_temp()
    speed = 331.4 + 0.6 * temp
    print("Speed:", speed)

    distance = speed * duration * 100
    return distance

while True:
    dist = get_distance()
    print("Distance:", dist)

    if dist < 10:
        led.value(1)
        buzzer.value(1)
    else:
        led.value(0)
        buzzer.value(0)

    time.sleep(2)