求帮助：micropython运行esp32,连接到了WiFi，电脑笔记本的，是连接到WiFi，同一个WiFi，电脑上下载了mqttx，同时可以和emqx建立连接，但是也esp32却不能连接本地服务器

Question

问题代码：

>>> %Run -c $EDITOR_CONTENT ip
network config: ('192.168.0.111', '255.255.255.0', '192.168.0.1', '192.168.1.1')
Traceback (most recent call last):
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/449320790186121.png "#left")

  File "<stdin>", line 37, in <module>
  File "umqtt/simple.py", line 68, in connect
OSError: [Errno 113] ECONNABORTED
>>> 

如图所示：

所应用的软件：

防火墙状态：但不确定关着了么

多次尝试：更换代码

具体代码：
方案一:

import time
from machine import Pin  # ---- 添加 --------
import network
from umqtt.simple import MQTTClient


def do_connect():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        wlan.connect('TP    5555G', '2580.xuan')
        i = 1
        while not wlan.isconnected():
            print("正在链接...{}".format(i))
            i += 1
            time.sleep(1)
    print('network config:', wlan.ifconfig())


def sub_cb(topic, msg): # 回调函数，收到服务器消息后会调用这个函数
    print(topic, msg)
    # ---- 添加 --------
    if topic.decode("utf-8") == "ledctl" and msg.decode("utf-8") == "on":
        led_pin.value(1)
    elif topic.decode("utf-8") == "ledctl" and msg.decode("utf-8") == "off":
        led_pin.value(0)
    # ---- 添加 --------


# 1. 联网
do_connect()

# 2. 创建mqt
c = MQTTClient("umqtt_client","192.168.0.103")  # 建立一个MQTT客户端
c.set_callback(sub_cb)  # 设置回调函数
c.connect()  # 建立连接
c.subscribe(b"ledctl")  # 监控ledctl这个通道，接收控制命令

# ---- 添加 --------
# 3. 创建LED对应Pin对象
led_pin = Pin(2, Pin.OUT)
# ---- 添加 --------

while True:
    c.check_msg()
    time.sleep(1)

方案二：

import time
from machine import Pin  
import network
from umqttsimple import MQTTClient
 
def do_connect():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        wlan.connect('TP    5555G', '2580.xuan')
        i = 1
        while not wlan.isconnected():
            print("正在链接...{}".format(i))
            i += 1
            time.sleep(1)
    print('network config:', wlan.ifconfig())
 
def sub_cb(topic, msg): 
    print(topic, msg)
    
    if topic.decode("utf-8") == "ledctl" and msg.decode("utf-8") == "on":
        led_pin.value(1)
    elif topic.decode("utf-8") == "ledctl" and msg.decode("utf-8") == "off":
        led_pin.value(0)
 
do_connect()
 
c = MQTTClient("umqtt_client","192.168.0.103")  
c.set_callback(sub_cb)  
c.connect()  
c.subscribe(b"ledctl")  
 
led_pin = Pin(2, Pin.OUT)
 
while True:
    try:
        c.check_msg()
    except OSError as e:
        print("error:", e)
        c.connect()
    time.sleep(1)

方案三：

import network
from umqtt.simple import MQTTClient
 
# 设置WiFi连接信息
ssid = 'TP    5555G'
password = '2580.xuan'
 
# 设置MQTT连接信息
mqtt_server = '192.168.0.103'
mqtt_port = 1883
mqtt_user = 'admin'
mqtt_password = 'duanwensheng123'
mqtt_topic = 'your_mqtt_topic'
 
# 连接WiFi
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect(ssid, password)
while not sta_if.isconnected():
    pass
 
# 连接MQTT
client = MQTTClient("esp32", mqtt_server, port=mqtt_port, user=mqtt_user, password=mqtt_password)
client.connect()
 
  

结果都连不上上面的服务器

以上这个问题怎么解决，怎么连接上

Answer 1

• 这篇博客: 【ESP8266 /ESP32】连接到自己的MQTT服务器并实现自动重连 基于micropython中的 连接WIFI 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

• WQTT_START = 1
  SSID="KAMI123"      #WIFI  ID
  PASSWORD="Q123"  #WIFI PASSWORD
  def connectWifi(SSID,PASSWORD):
      global wlan
      wlan=network.WLAN(network.STA_IF)         #创建wlan对象
      wlan.active(True)                         #激活网络接口
      wlan.disconnect()                         #断开最后连接的WiFi
      wlan.connect(SSID,PASSWORD)                 #连接WIFI
      print("*********WIFI LOADING*********")  
      time.sleep(0.1)
      while(wlan.ifconfig()[0]=='0.0.0.0'):
        time.sleep(1)
      while wlan.isconnected() == False:			#等待连接成功
        pass
      print("*********WIFI OK*********")
  connectWifi(SSID,PASSWORD)  
  

  写完后把文件拖到device区就可以自动下载，重启板子生效

  连接成功的话串口调试助手会返回 WIFI OK字样 接下来我们可以尝试连接MQTT服务器了