from machine import Pin, ADC
from math import log
import time

adc = ADC(Pin(26))

const = 3950
prev_cel = -25.0
while True:
    value = adc.read_u16()
    cel = round(1 / (log(1 / (65535. / value - 1)) / const + 1.0 / 298.15) - 273.15, 1)
    if cel != prev_cel:
        print(f"Temperature: {cel}°C")
        print("")
        prev_cel = cel
    time.sleep(0.5)