from machine import Pin, PWM, Timer
import utime
import time
import machine
from dht11.py import DHT11, InvalidChecksum

# Pin configuration
flame_sensor_pin = 16
flame_sensor = Pin(flame_sensor_pin, Pin.IN)
buzzer_pin = 17
buzzer = Pin(buzzer_pin, Pin.OUT)
utime.sleep(0.5)

# Flame sensor interrupt handler
def flame_sensor_interrupt(pin):
    if pin.value() == 0:
        print("Flame Detected! Please Evacuate")
        pwm.duty_ns(MAX)
        while pin.value() == 0:
            buzzer.high()
            utime.sleep(0.5)
            buzzer.low()
            utime.sleep(0.5)

# Configure flame sensor interrupt
flame_sensor.irq(trigger=Pin.IRQ_FALLING, handler=flame_sensor_interrupt)

# Other pin configurations
adc = machine.ADC(26)
conversion = 100 / 65535

Trig = Pin(14, Pin.OUT)
Echo = Pin(15, Pin.IN)

# Distance sensor
def distance():
    Trig.value(0)
    time.sleep_us(4)
    Trig.value(1)
    time.sleep_us(10)
    Trig.value(0)
      
    while Echo.value() == 0:
       low = time.ticks_us()
       
    while Echo.value() == 1:
       high = time.ticks_us()
       
    t = high - low
    return t

# Servo Motor
MID = 1500000
MIN = 1000000
MAX = 2000000
pwm = PWM(Pin(0))
pwm.freq(50)
pwm.duty_ns(MID)

# Buzzer set to low
buzzer.low()

# Infinite loop
while True:
    pwm.duty_ns(MIN)
    raincov = 100 - (adc.read_u16() * conversion)
    rain = round(raincov, 1)
    flame_sensor_interrupt(flame_sensor)
    if flame_sensor.value()==1:
        print("System Normal")
    if rain <= 30:
        print("No Rain", str(rain))
    elif 30 < rain <= 50:
        print("Mild Rain", str(rain))
    else:
        print("Heavy Rain", str(rain))
        while rain > 1:
            pwm.duty_ns(MIN)
            if flame_sensor.value() == 1:
                buzzer.high()
                utime.sleep(0.5)
                buzzer.low()
                utime.sleep(0.5)
            else:
                break
    rain1 = rain
    # Distance sensor logic
    rain2 = 100 - (adc.read_u16() * conversion)
    if abs(rain2 - rain1) > 10 or flame_sensor.value() == 0:
        break
    else:
        dis = distance()  # Get the distance
        cm = dis / 29 / 2  # Convert time to "cm"
        cm = int(cm)
        inch = dis / 74 / 2  # Convert time to "inch"
        inch = int(inch)
        time.sleep(5)
        pin = Pin(28, Pin.OUT, Pin.PULL_DOWN)
        sensor = DHT11(pin)
        t = sensor.temperature
        h = sensor.humidity
        print("Distance: ", cm, "cm ", inch, " inch")
        print("Temperature: {}".format(t))
        print("Humidity: {}".format(h))
        time.sleep(5)
        print("")
    utime.sleep(1)