import machine
import math
import time

adc = machine.ADC(machine.Pin(34))
adc.atten(machine.ADC.ATTN_11DB)  
adc.width(machine.ADC.WIDTH_10BIT)  
led = machine.Pin(21, machine.Pin.OUT)

BETA = 3950  

while True:
    analog_read = adc.read()
    
    celsius = 1 / (math.log(1 / (1023. / analog_read - 1)) / BETA + 1.0 / 298.15) - 273.15
    
    print("Temperature: {:.2f} °C".format(celsius))
    
    if celsius >= 35.0:
        led.on()
    else:
        led.off()
        
    time.sleep(1)