micropython连接wifi和MQTT服务器,可以做到wifi的断线重连和MQTT服务器的断线重连
时间: 2023-05-29 10:04:05 浏览: 354
可以通过以下代码实现:
```python
import network
from umqtt.simple import MQTTClient
import time
# WIFI连接配置
SSID = 'your_SSID'
PASSWORD = 'your_PASSWORD'
# MQTT服务器配置
MQTT_BROKER = 'your_MQTT_BROKER'
MQTT_PORT = 1883
MQTT_USER = 'your_MQTT_USER'
MQTT_PASSWORD = 'your_MQTT_PASSWORD'
MQTT_TOPIC = b'test'
# WIFI连接
def connect_wifi():
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
if not wlan.isconnected():
print('connecting to network...')
wlan.connect(SSID, PASSWORD)
while not wlan.isconnected():
time.sleep(1)
print('network config:', wlan.ifconfig())
# MQTT连接
def connect_mqtt():
client = MQTTClient('esp32', MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD)
try:
client.connect()
print('MQTT connected')
return client
except Exception as e:
print('MQTT connection failed:', e)
return None
# 断线重连
def reconnect():
while True:
if not wlan.isconnected():
connect_wifi()
if not client.is_connected():
client = connect_mqtt()
if client:
client.subscribe(MQTT_TOPIC)
time.sleep(1)
# 主程序
connect_wifi()
client = connect_mqtt()
if client:
client.subscribe(MQTT_TOPIC)
while True:
client.check_msg()
time.sleep(1)
else:
print('MQTT connection failed, start reconnecting...')
reconnect()
```
在主程序中,先连接wifi和MQTT服务器,如果连接成功,则订阅一个MQTT话题,并进入循环中等待接收消息。如果连接失败,则进入断线重连的循环中,不断尝试连接wifi和MQTT服务器,直到成功连接为止。这样可以实现wifi和MQTT服务器的断线重连。