Third-party devices have been connected since they failed to connect, and cannot receive data. It can only be solved by allowing connections on third-party devices. Third-party devices are their own mobile phones, so you can set allowed connections on your mobile phones.
The third party ip port you want to communicate with is wrong and cannot be received. This situation is more complicated because it is difficult for you to change. You need to reset the ip address of the third party in the flagship store, that is, you need to connect the mobile phone to the store, and the staff needs to change the ip interface to your mobile phone ip address.