from machine import ADC,Pin
import time
sensor = ADC(26)
green_led = Pin(15, Pin.OUT)
red_led = Pin(14, Pin.OUT)
buzzer = Pin(13, Pin.OUT)
while True:
    value = sensor.read_u16()
    voltage = value*(3.3/65535)
    if voltage > 2.5:
        print("Normal")
        green_led.on()
        red_led.off()
        buzzer.off()
    elif voltage>1.0:
        print("Under Volatge")
        green_led.off()
        red_led.on()
        buzzer.off()
    else:
        print("Failure")
        green_led.off()
        red_led.off()
        buzzer.on()
    time.sleep(1)