Telit Wireless Solutions ML865G1 At Commands Reference Guide

ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev.4 Page 378 of 545 2020-04-15
3.13.12. AT#SL - Socket Listen
The command opens/closes socket listening.
SIM Presence
Setting saved
Can be aborted
MAX timeout
SELINT
Required
No
No
-
2
AT#SL=<connId>,<listenState>,<listenPort>[,<lingerT>]
Set command opens/closes a socket listening for an incoming TCP connection on a specified port.
Parameters:
Name
Type
Default
Description
<connId>
integer
N/A
socket connection identifier
Value:
1÷6
:
socket connection identifier
<listenState>
integer
N/A
listening action
Values:
0
:
close socket listening
1
:
start socket listening
<listenPort>
integer
N/A
local listening port
Value:
1÷65535
:
local listening port value
<lingerT>
integer
N/A
linger time
Values:
0
:
immediate closure after remote closure
255
:
local host closes only after an escape sequence (+++)
If successful, command returns a final result code OK. If the ListenAutoRsp flag has not
been set through the command #SCFGEXT (for the specific <connId>), then, when a
TCP connection request comes on the input port, if the sender is not filtered by internal
firewall (see #FRWL), an URC is received:
+SRING : <connId>
Afterwards we can use #SA to accept the connection or #SH to refuse it.
If the ListenAutoRsp flag has been set, then, when a TCP connection request comes on
the input port, if the sender is not filtered by the internal firewall (see #FRWL), the
connection is automatically accepted: the CONNECT indication is given and the modem
goes into online data mode.
If the socket is closed by the network the following URC is received:
#SKTL: ABORTED

Telit Wireless Solutions ML865G1 Specifications

General

Brand	Telit Wireless Solutions
Model	ML865G1
Category	Wireless modules
Language	English