The data received by the module's serial port will be broadcast to each of its client connections.
3.4.3MULTIS Caution
When there is one client connection, the GPIO10 pin will be pulled low to indicate client access, when there is no client
connection in the module server link, GPIO10 will be pulled high to indicate no client access.
When there is no client connection in the module server link, GPIO10 will be pulled high to indicate that there is no
access from any of the clients.
Messages from any TCP client will be printed out by the module's serial port, and messages entered by the module's
serial port will be broadcast by the server to each of its client links.
Each client can choose to go offline at any time without restarting the configuration server.
When the server already has a link to 4 clients, the server will automatically kick off the earliest client link to the server
when there is another access.
3.5 Multi-link mode for clients (MULTIC)
When the module works in MULTIC mode, other modes or sub-functions will not be used, MULTIC means that the
module can support multiple server connection mode as a client, currently this mode supports access to two server links
at the same time, A B two for common TCP/UDP links; in this example, the module will be made to work in the
