import machine
from machine import Pin
import time
from math import log

BETA = 3950
led_status = Pin(23, Pin.OUT)
adc= machine.ADC(machine.Pin(32))
adc.atten(machine.ADC.ATTN_11DB)
adc.width(machine.ADC.WIDTH_12BIT)

def blink_led (k):
    if k==1 : 
        led_status.value(1)
        time.sleep_ms(50)
        led_status.value(0)
        time.sleep_ms(50)
    elif k==0 :
        led.status.value(0)

while True : 
    analog_adc_input=adc.read()

    celsius = 1 / (log(1 / (4095. / analog_adc_input - 1)) / BETA + 1.0 / 298.15) - 273.15
    if celsius >= 35 :
        blink_led(1)
        print("FIRE ALERT !!!!")
        print(f"Current sensor reading : {celsius} °C")
    else : 
        print(f"Current sensor reading : {celsius} °C")
        led_status.value(0)

    time.sleep(0.5)