from machine import Pin, ADC, PWM
from time import sleep

# setup
pot = ADC(Pin(35))          # potentiometer on GPIO 35
pot.atten(ADC.ATTN_11DB)    # full range: 0-3.3V
servo = PWM(Pin(26), freq=50)  # servo on GPIO 26, 50Hz

def set_servo_angle(angle):
    # Map angle (0-180) to duty for 0.5ms-2.5ms pulse
    duty = int((angle / 180) * 102 + 26)  # range ~26-128
    servo.duty(duty)

while True:
    val = pot.read()  # 0 to 4095
    angle = int(val * 180 / 4095)  # scale to 0-180
    set_servo_angle(angle)
    print("Analog:", val, "=> Angle:", angle)
    sleep(0.1)