mqtt-control/esp8266/main.py

from mywifi import MyWifi
from esp_mqtt import MqttOneNet

class Device():
    _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) -> None:
        self.wifi = MyWifi()
        self.mqtt = MqttOneNet()

# if __name__ == '__main__':
device = Device()
#device.mqtt.publish_timer_callback()