import time
time.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico W!")
from machine import Pin, PWM
from time import sleep
import dht

# DHT22 sensor pin
DHT_PIN = 2  # Replace with your actual pin number
# Buzzer pin
BUZZER_PIN = 15  # Replace with your actual pin number
# Temperature threshold
TEMP_THRESHOLD = 30.0

# Initialize DHT22 sensor
dht_sensor = dht.DHT22(Pin(DHT_PIN))

# Initialize buzzer (PWM for sound control)
buzzer = PWM(Pin(BUZZER_PIN))
buzzer.freq(1000)  # Set buzzer frequency (adjust as needed)
buzzer.duty_u16(0) # Turn off buzzer initially


def read_temperature():
    try:
        dht_sensor.measure()
        temperature = dht_sensor.temperature()
        return temperature
    except OSError as e:
        print("Failed to read sensor:", e)
        return None

def play_alarm():
    for _ in range(3):  # Play alarm for a few cycles
        buzzer.duty_u16(1000)  # Adjust duty cycle for volume
        sleep(0.2)
        buzzer.duty_u16(0)
        sleep(0.2)


# Main loop
while True:
    temperature = read_temperature()

    if temperature is not None:
        print("Temperature: {:.1f} °C".format(temperature))

        if temperature > TEMP_THRESHOLD:
            print("Temperature exceeding threshold! Triggering alarm...")
            play_alarm()
        else:
            buzzer.duty_u16(0)  # Ensure buzzer is off

    sleep(2)