from machine import Pin,ADC
from time import sleep
import math
relay=Pin(5,Pin.OUT)
BETA = 3950
abc = ADC(Pin(34))
abc.atten(ADC.ATTN_11DB)

def read_ntc_temperature():
    analog_value=abc.read()
    print(analog_value)
    temperature_celsius = 1 / (math.log(1 / (4096 / analog_value -1) ) / BETA + 1.0 /298.15) -273.15
    return temperature_celsius 
relay.value(0)
#relay.value(1)
while True:
    temperature = read_ntc_temperature()
    print("Temperature:{:.2f}℃".format(temperature))
    if temperature>27:
        relay.value(1)
    if temperature>=24 and temperature<=27:
        relay.value(1)
    if temperature>24:
        relay.value(0)
    sleep(1)