Chapter 19 – TCP/IP App AT Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
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Socket State Change +WSKS
Description:
This unsolicited response indicates a change in a socket state. This response is used to report socket
“Receive data is available” only when the corresponding socket type receive data mode is set to ‘polled’
(+WCRX command).
Response Values:
<type>
The socket type associated with this state change.
0
TCP
1
UDP
<socket>
The socket number associated with this state change.
<status>
The current socket state;
1
Socket is open.
2
Receive data is available.
4
Socket is closed.
Syntax: Response
syntax:
+WSKS: <type>,<socket>,<state>
Possible responses
+WSKS: 0,0,1
Note: TCP socket zero has opened.
+WSKS: 0,0,2
Note: TCP socket zero has received data available.
+WSKS: 1,0,2
Note: UDP socket zero has received data
available.
+WSKS: 1,1,4
Note: UDP socket one has closed.
Socket Open/Close Error +WSKE
Description:
This unsolicited response indicates that an error has occurred during a socket open or close operation.
Response Values:
<type>
The socket type associated with this error.
0
TCP
1
UDP
<socket>
The socket number associated with this error.
<error>
The error indication of the socket. See sections 21.12 and 21.13 for a list of the returned codes
and their meanings.
Syntax: Response
syntax:
+WSKE: <type>,<socket>,<error>
Possible responses
+WSKE: 0,0,100
Note: Invalid descriptor for TCP socket zero.
+WSKE: 1,1,117
Note: Connection reset on UDP socket one.
Socket Data Transmission Status +WSTX
Description:
This unsolicited response indicates the number of bytes transmitted for the most recently used +WSTX
command on the indicated socket.
Response Values:
<type>
The socket type associated with this transmission status.
0
TCP
1
UDP
<socket>
The socket number associated with this transmission status.
<length>
The number of bytes transmitted. This value is an ASCII character decimal number.
Syntax:
Response syntax:
+WSTX: <type>,<socket>,<length>
Possible responses
+WSTX: 0,0,536
Note: 536 bytes sent on TCP socket zero.
+WSTX: 1,1,600
Note: 600 bytes sent on UDP socket one.