from time import sleep
from machine import ADC , Pin

thermistor_adc = ADC(28)
led_pin = Pin (21,Pin.OUT)
while True:
    # Read ADC digital output
    digital_val = thermistor_adc.read_u16()

    # Calculate analog value
    analog_val = float((digital_val/(2**16-1)) * 3.3)

    # Plot analog value
    print(analog_val)
    if analog_val <= 1.469906:
        led_pin.on()
        print("Led is on")
    else:
        led_pin.off()


    sleep(.05)