Python调用Shelly Plug S API遇连接重置及拒绝错误求助

问题背景 #

尝试通过Python脚本发送POST请求配置Shelly Plug S接入WiFi，Postman可正常完成配置，但脚本先后抛出以下错误：

1. ConnectionResetError: [Errno 104] Connection reset by peer
2. 更新后出现：ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接

用户提供的原始代码：

import http.client

ssid = input("WiFi SSID: ")
pwd = input("Password: ")

conn = http.client.HTTPSConnection("192.168.33.1", "80")

payload = 'ssid='+ssid+'&key='+pwd+'&ipv4_method=dhcp&enabled=true'
headers = {
'Content-Type': 'application/x-www-form-urlencoded',
}
conn.request("POST", "/settings/sta", payload, headers)
res = conn.getresponse()
data = res.read()
print(data. Decode("utf-8"))

首次错误回溯：

Traceback (most recent call last):
  File "/home/smarthome/shelly.py", line 12, in <module>
    conn.request("POST", "/settings/sta", payload, headers)
  File "/usr/lib/python3.10/http/client.py", line 1282, in request
  File "/usr/lib/python3.10/http/client.py", line 1328, in _send_request
  File "/usr/lib/python3.10/http/client.py", line 1277, in endheaders
  File "/usr/lib/python3.10/http/client.py", line 1037, in _send_output
  File "/usr/lib/python3.10/http/client.py", line 975, in send
  File "/usr/lib/python3.10/http/client.py", line 1454, in connect
  File "/usr/lib/python3.10/ssl.py", line 512, in wrap_socket
  File "/usr/lib/python3.10/ssl.py", line 1070, in _create
  File "/usr/lib/python3.10/ssl.py", line 1341, in do_handshake
ConnectionResetError: [Errno 104] Connection reset by peer

修复方案 #

1. 核心问题：错误使用HTTPS协议 #

Shelly设备在初始AP模式下（IP 192.168.33.1）仅提供HTTP服务，不支持SSL/TLS连接。原始代码用HTTPSConnection强制发起SSL握手，设备无法响应导致连接重置。

修复：将http.client.HTTPSConnection替换为http.client.HTTPConnection，端口保持80不变。

2. 语法错误修正 #

原始代码中print(data. Decode("utf-8"))存在多余空格，正确写法为print(data.decode("utf-8"))，否则会触发语法错误。

3. 连接拒绝问题排查 #

若修改后仍出现ConnectionRefusedError，检查以下几点：

• 确认电脑已连接到Shelly Plug S的默认AP热点（名称格式为ShellyPlugS-XXXXXX）
• 验证设备IP是否为192.168.33.1（部分型号可能用192.168.1.1，可通过路由器ARP表或手机WiFi详情页确认）
• 临时关闭电脑防火墙/安全软件，避免拦截本地网络请求

修复后完整代码 #

import http.client

ssid = input("WiFi SSID: ")
pwd = input("Password: ")

# 使用HTTP协议连接Shelly设备
conn = http.client.HTTPConnection("192.168.33.1", 80)

# 用f-string简化payload拼接，更简洁安全
payload = f'ssid={ssid}&key={pwd}&ipv4_method=dhcp&enabled=true'
headers = {
    'Content-Type': 'application/x-www-form-urlencoded',
}

try:
    conn.request("POST", "/settings/sta", payload, headers)
    res = conn.getresponse()
    data = res.read()
    print(data.decode("utf-8"))
except Exception as e:
    print(f"请求失败: {str(e)}")
finally:
    # 确保连接关闭
    conn.close()

内容的提问来源于stack exchange，提问作者Ákos