from machine import Pin, time_pulse_us
import time, dht

trig=Pin(5,Pin.OUT)
echo=Pin(18,Pin.IN)
led=Pin(2,Pin.OUT)
buzzer=Pin(4,Pin.OUT)
button=Pin(12,Pin.IN,Pin.PULL_UP)
sensor=dht.DHT22(Pin(15))

def get_distance():
    trig.value(0)
    time.sleep_us(2)
    trig.value(1)
    time.sleep_us(10)
    trig.value(0)
    duration=time_pulse_us(echo,1,30000)
    return duration/58

last_dht=time.ticks_ms()

while True:
    if button.value()==0:
        distance=get_distance()
        if time.ticks_diff(time.ticks_ms(),last_dht)>5000:
            sensor.measure()
            temperature=sensor.temperature()
            humidity=sensor.humidity()
            print("Distance:",distance,"cm","Temp:",temperature,"C","Hum:",humidity,"%")
            last_dht=time.ticks_ms()
        else:
            print("Distance:",distance,"cm")
        if distance<100 or (sensor.temperature()>40) or (sensor.humidity()>40):
            led.value(1)
            buzzer.value(1)
        else:
            led.value(0)
            buzzer.value(0)
    else:
        led.value(0)
        buzzer.value(0)
    time.sleep(0.2)