the scheme of wireless AP is adopted and recommended by most manufacturers, but the wireless coverage of food and beverage outlets will also face another problem, that is, there is no professional technical maintenance personnel, so once the wireless network fails, it is necessary to contact the manufacturer for maintenance. At present, if you go to many restaurants, you will encounter it. Is there wireless? Yes, but it doesn't work well. Therefore, in addition to considering the coverage effect, I suggest that we also need to consider the issue of intelligence when choosing wireless products. The ad hoc network of the network month is a good choice.