from machine import Pin, ADC
import time

# Set up ADC
adc = ADC(Pin(34))  # GPIO34
adc.atten(ADC.ATTN_0DB)  # Full-scale voltage is 3.3V
adc.width(ADC.WIDTH_12BIT)  # 12-bit resolution

# Set up LED
led = Pin(2, Pin.OUT)

# Define the threshold value for turning the LED on or off
THRESHOLD = 2048  # Midpoint for 12-bit ADC (0-4095)

while True:
    # Read ADC value
    adc_value = adc.read()
    
    # Control LED based on ADC value
    if adc_value > THRESHOLD:
        led.on()  # Turn LED on
    else:
        led.off()  # Turn LED off
    
    # Wait for a short period
    time.sleep(0.1)