import dht
from machine import Pin
import time

# sensor 
sensor = dht.DHT22(Pin(4))

# buzzer
buzzer = Pin(15, Pin.OUT)

# temperature limit
TEMP_THRESHOLD = 20  # °C

while True:
    try:
        sensor.measure()                   
        temp = sensor.temperature()        
        hum = sensor.humidity()            

        print(f"Temp: {temp:.1f}°C | Humidity: {hum:.1f}%")

        # Check limit
        if temp > TEMP_THRESHOLD:
            buzzer.value(1)                # ON
            print("⚠️ Buzzer ON! Temperature high!")
        else:
            buzzer.value(0)                # OFF

    except OSError as e:
        print("Sensor error:", e)

    time.sleep(10)