关于pca9685问题

[hyt3]

按照视频教程修改代码以及连接，运行无报错，但是舵机就是不动

import time
from servo import Servos
from machine import I2C, Pin

i2c = I2C(sda=Pin('P5'), scl=Pin('P4'))
servo = Servos(i2c, address=0x40, freq=50, min_us=500, max_us=2500, degrees=180)

while True:
    servo.position(0, 0)
    time.sleep(500)
    servo.position(0, 180)
    time.sleep(500)

    servo.position(1, 0)
    time.sleep(500)
    servo.position(1, 180)
    time.sleep(500)