micropython连接阿里云调用接口代码

以下是一个基于MicroPython的示例代码，用于连接阿里云并调用API接口：

import urequests
import ujson
import utime
import hashlib
import hmac

def generate_signature(method, content_type, body, access_key_secret):
    timestamp = str(int(utime.time() * 1000))
    content_md5 = hashlib.md5(body.encode('utf-8')).hexdigest()
    string_to_sign = method + '\n' + content_md5 + '\n' + content_type + '\n' + timestamp
    signature = hmac.new(access_key_secret.encode('utf-8'), string_to_sign.encode('utf-8'), hashlib.sha1).digest()
    signature = signature.decode('utf-8').strip()
    return 'ACS ' + access_key_id + ':' + signature

access_key_id = 'your_access_key_id'
access_key_secret = 'your_access_key_secret'
url = 'https://your_domain.com/your_api'

headers = {
    'Content-Type': 'application/json',
}

data = {
    'param1': 'value1',
    'param2': 'value2'
}

body = ujson.dumps(data)

signature = generate_signature('POST', 'application/json', body, access_key_secret)

headers['Authorization'] = signature
headers['Date'] = str(int(utime.time() * 1000))

response = urequests.post(url, headers=headers, data=body)

print(response.content.decode())

其中，`generate_signature`函数用于生成请求签名，需要传入请求方法、请求内容类型、请求体、以及阿里云的Access Key Secret。`access_key_id`和`access_key_secret`需要替换为你自己的阿里云Access Key信息。`url`、`headers`和`data`根据你具体的API接口进行修改。