from machine import ADC, Pin 
from time import sleep 
from math import log 
 
th = ADC(Pin(15)) 
ntc_beta_coef = 3950 
abs_zero = -273.15 
k_to_c_const = 298.15 
 
def analogTotemp(beta, absz, ktoc, analog): 
  c = 1/((log(1/(65535/analog-1))/beta) +(1/ktoc))+absz 
  return c 
 
while True: 
  analog_val = th.read_u16() 
  c = analogTotemp(ntc_beta_coef, abs_zero, k_to_c_const, analog_val) 
  print("analog value = ", analog_val," celcius = ",c) 
  sleep(0.5)