AT+i Programmer's Manual - SE Spezial-Electronic AG

13.3 +iLTCP — Open A TCP Listening Socket
Syntax: AT+iLTCP:,
Parameters:
Direct Socket Interface
Opens a TCP listening socket on the local IP address and the
specified port . The parameter specifies the
maximum number of remote concurrent connections allowed
through the listening socket.
0..65535
1..10
Command Options:
Listening port to be used by a remote system when connecting
to iChip.
Specifies the maximum number of active connections that may
be concurrently established through the listening socket.
Result Code:
Once the listening socket is open, it automatically accepts
remote connect requests up to the maximum allowed. When a
remote system connects through the listening socket, a new
TCP socket is spawned internally ready to send and receive
data. See the AT+iLSST command for details on retrieving the
handles of active sockets connected through a listening socket.
When a connected socket is closed by the host using the
AT+iSCLS command, the listening socket allows a new
connection in its place.
I/ Upon successfully opening a TCP listening socket, a socket
handle is returned. The socket handle is in the
range 10..11 and used to reference the socket in all following
socket commands.
I/ERROR Otherwise
AT+i Programmer‘s Manual Version 8.21 13-3