from machine import Pin, PWM
import onewire, ds18x20
import time

dat = Pin(15)
ow = onewire.OneWire(dat)
ds = ds18x20.DS18X20(ow)

roms = ds.scan()
if not roms:
    while True:
        time.sleep(1)

servo = PWM(Pin(16))
servo.freq(50)

def set_angle(angle):
    min_duty = 1638
    max_duty = 8192
    duty = int(min_duty + (angle / 180) * (max_duty - min_duty))
    servo.duty_u16(duty)

while True:
    ds.convert_temp()
    time.sleep_ms(750)
    temp = ds.read_temp(roms[0])
    print(temp)
    if temp > 50:
        set_angle(90)
    else:
        set_angle(0)
    time.sleep(2)