from machine import Pin
import time 
import onewire,ds18x20

ds_pin = Pin(13)
ds_sensor = onewire.OneWire(ds_pin)

def read_ds_sensor():
    roms = ds_sensor.scan()
    print('发现设备：',roms)
    for i in roms:
        temp = ds_sensor.convert_temp()
        return temp
    return 0 

while True:
    print('现在温度是%.2f' % read_ds_sensor())
    time.sleep(1)