AirPrime and HL7548 AT Commands Interface Guide Rev10 0

4116303 Rev 10.0 August 10, 2017 207
AT Commands Interface Guide
Protocol Specific Commands
HL7518 and HL7548
4 TCP disconnection by the server or remote client
5 TCP connection error
6 Generic error
7 Fail to accept client request’s
8 Data sending is OK but KTCPSND was waiting more or less characters
9 Bad session ID
10 Session is already running
11 All sessions are used
Reference
Sierra Wireless
Proprietary
Notes
This command is used for connecting to a remote server or listening to a bound port,
depending on the selected mode of <session_id.>
11.10.3. +KTCPRCV Command: Receive Data through a
TCP Connection
HL7518 and HL7548
Test command
Syntax
AT+KTCPRCV=?
Response
+KTCPRCV: (list of possible <session_id>s),(list of possible <ndata>s)
OK
Write command
Syntax
AT+KTCPRCV=
<session_id>,
<ndata>
Response
CONNECT
…<EOF pattern>
OK
+KTCP_NOTIF: <session_id>,<tcp_notif>
Parameters
<session_id> TCP session index
<ndata> Number of bytes the device wants to receive (max value 4294967295)
<tcp_notif> See command AT+KTCPCNX
Reference
Sierra Wireless
Proprietary
Notes
• This function is used to receive <ndata> data bytes through a previously opened
TCP socket.
• <ndata> indicates the max data number that the terminal wishes to receive. If the
TCP socket contains more data than <ndata> bytes then only <ndata> bytes will
be received. If the TCP socket contains less data than <ndata> bytes then only
TCP socket’s data will be received.
• <EOF pattern> would be added at the end of data automatically.
• When <ndata> (max value) bytes or only available data in the TCP socket have
been received, the module returns to command state and returns OK.
• It is highly recommended to configure the module for hardware flow control using
AT&K3 before using this command.
• The behavior of DTR drop meets with AT&D.