mqtt-control/esp8266/mywifi.py

import network
from machine import Timer
SSID = "Xiaomi_eng"
PASSWORD = "88888888"

class MyWifi():
    _instance = None
    # 单例模式：WiFi实例化只能有一次，实例化多个 mywifi 对象将始终返回同一个-
    def __new__(cls, *args, **kwargs):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
        return cls._instance   # 返回的是内存地址

    def __init__(self, ssid=SSID, password=PASSWORD) -> None:
        self.ssid = ssid
        self.password = PASSWORD
        self.wlan = network.WLAN(network.STA_IF)
        self.wlan.active(True)
        self.tim = Timer(0)
        # 每 2000ms 定时回调一次 self.upload_data()
        self.tim.init(period=5000, mode=Timer.PERIODIC,callback=self.do_connect)
        self.connect_status = False

    def do_connect(self, timer):
        if not self.wlan.isconnected():
            print('connecting to network...')
            self.wlan.connect(SSID, PASSWORD)
            while not self.wlan.isconnected():
                pass
            print('network config:', self.wlan.ifconfig())
            self.connect_status = True
    
    # 松耦合设计原理：利用接口访问他们的状态，防止随意访问这个类的内部导致数据意外篡改
    def get_status(self):
        return self.connect_status
    
if __name__ == '__main__':
    MyWifi()