led-light-sensor/mywifi.py

import network
from machine import Timer
SSID = "Xiaomi_eng"
# SSID = "Mi11_eng"
PASSWORD = "88888888"

class MyWifi():
    # _instance = None
    # _first_init = True

    # 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

    # WiFi 不能被初始化两次，否则会发生内部错误
    # 注意，在重复导入模块时，已经被算作初始化了，如果另一个模块又导入了这个类，很容易重复实例化一个新的WiFi对象
    # 避免重复 init，因为那些值会被重新初始化
    def __init__(self, ssid=SSID, password=PASSWORD) -> None:
        self.wlan = network.WLAN(network.STA_IF)            
        self.ssid = ssid
        self.password = password
        self.tim = Timer(0)
        self.s = {'status': 'start connect', 'count': 0, 'check_count': 3}
        self.tim.init(period=1, mode=Timer.ONE_SHOT,callback=self.check_disconnect)


    def check_disconnect(self, timer):
        self.tim.init(period=1000, mode=Timer.ONE_SHOT,
                    callback=self.check_disconnect)
        if self.s['status'] == 'start connect':
            if not self.wlan.isconnected():
                print("Start connect to wifi:", self.ssid)
                self.wlan.active(True)
                self.wlan.connect(self.ssid, self.password)
                print('connecting to network...', self.ssid)
            self.s['status'] = 'check isconnected'
            self.tim.init(period=1, mode=Timer.ONE_SHOT,
                        callback=self.check_disconnect)
        elif self.s['status'] == 'check isconnected':
            if self.wlan.isconnected():
                self.s['count'] = 0
                self.s['status'] = 'recheck'
                print('Connection successful:', self.wlan.ifconfig())
            else:
                print('try to connect to network...', self.s['count'])
                self.s['count'] += 1
                # 设置连接超时时间
                if self.s['count'] > self.s['check_count']:
                    self.s['status'] = 'recheck'
                    self.s['count'] = 0
        elif self.s['status'] == 'recheck':
            if not self.wlan.isconnected():
                self.wlan.active(False)
                print('error: wifi disconnect')
                self.s['status'] = 'start connect'

    def _do_connect(self, recheck=False):
        if not self.wlan.isconnected():
            self.wlan.active(True)
            self.wlan.connect(self.ssid, self.password)
            print('connecting to network...', self.ssid)
            while not self.wlan.isconnected():
                pass
        print('network config:', self.wlan.ifconfig())

    def get_wifi_addr(self):
        return self.get_wifi_ifconfig()[0]

    def get_wifi_ifconfig(self):
        # 等待 check_disconnect() WiFi连接成功再返回
        while not self.s['status'] == 'recheck':
            pass
        # 返回： ('192.168.31.123', '255.255.255.0', '192.168.31.1', '192.168.31.1')
        return self.wlan.ifconfig()
    
my_wifi = MyWifi()