# Project objectives: 
#   Read temperature and humidity values from the DHT22 sensor
#   Display the sensor readings in the console
#
# Hardware connections used:
#   DHT22 VCC Pin to 3.3V
#   DHT22 SDA Pin to GPIO Pin 15
#   10k ohm pull-up resistor from DHT22 SDA Pin to 3.3V
#   DHT22 GND Pin to GND
#
# Programmer: Adrian Josele G. Quional

# modules
from machine import Pin, PWM, I2C
from time import sleep
from dht import DHT22
import i2c_lcd

# Buzzer function
def buzzerFunc():
    buzzer = PWM(Pin(26))
    buzzer.freq(500)
    buzzer.duty_u16(1000)
    sleep(1)
    buzzer.duty_u16(0)

# DHT22 aur LCD setup
dht = DHT22(Pin(22))
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
I2C_ADDR = i2c.scan()[0]
lcd = i2c_lcd.I2cLcd(i2c, I2C_ADDR, 2, 16)

# Loop to get sensor readings
while True:
    dht.measure()
    sleep(1)
    temp = dht.temperature()
    hum = dht.humidity()
    print(f"Temperature: {temp}°C Humidity: {hum}% ")
    lcd.putstr(f" Temp: {temp}°C Humty: {hum}% ")
    sleep(5)
    lcd.clear()
    sleep(1)

    # Buzzer alert agar temp/humidity limit se zyada hai
    if(temp > 20 or hum > 30):
        buzzerFunc()
    else: