给我一个esp32 web 框架示例

以下是一个ESP32 Web框架示例：

from machine import Pin
from esp32 import PWM
from time import sleep
from micropython import const
import network
import esp
import ujson
import urequests
import gc
import socket
import uasyncio as asyncio

# WiFi配置信息
WIFI_SSID = 'your_ssid'
WIFI_PASS = 'your_password'

# 服务器配置信息
SERVER_IP = 'your_server_ip'
SERVER_PORT = 80
API_PATH = '/api/data'

# 电机配置信息
MOTOR_PIN = const(27)
MOTOR_PWM_FREQ = const(1000)
MOTOR_PWM_CHANNEL = const(0)
MOTOR_PWM_DUTY = const(512)

# LED配置信息
LED_PIN = const(13)

# 初始化WiFi连接
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect(WIFI_SSID, WIFI_PASS)
while not sta_if.isconnected():
    pass

# 初始化电机PWM输出
motor_pwm = PWM(Pin(MOTOR_PIN), freq=MOTOR_PWM_FREQ)
motor_pwm_channel = motor_pwm.channel(MOTOR_PWM_CHANNEL, duty=MOTOR_PWM_DUTY)

# 初始化LED输出
led_pin = Pin(LED_PIN, Pin.OUT)

# 初始化GC
gc.enable()
gc.collect()

# 定义HTTP请求函数
def http_request(method, url, data=None, headers=None):
    try:
        if data is not None:
            data = ujson.dumps(data).encode('utf-8')
        if headers is None:
            headers = {'Content-Type': 'application/json'}
        response = urequests.request(method, url, data=data, headers=headers)
        return response
    except:
        return None

# 定义获取数据函数
async def get_data():
    while True:
        response = http_request('GET', 'http://{0}:{1}{2}'.format(SERVER_IP, SERVER_PORT, API_PATH))
        if response is not None and response.status_code == 200:
            data = response.json()
            motor_pwm_channel.duty(data['motor_speed'])
            led_pin.value(data['led_state'])
        await asyncio.sleep(1)

# 开始事件循环
loop = asyncio.get_event_loop()
loop.create_task(get_data())
loop.run_forever()

这个示例展示了如何使用ESP32连接WiFi并从服务器获取数据，然后控制电机和LED输出。在这个示例中，我们使用了uasyncio库来实现非阻塞事件循环，这使得我们可以同时处理多个任务。我们还使用了urequests库来发送HTTP请求和接收响应。最后，我们使用了PWM类来控制电机的速度，使用Pin类来控制LED的状态