Cinterion
®
ENS22-E AT Command Set
7.9 AT^SISW
ENS22-E_ATC_V01.000
19/02/11
Page 115 of 189
- it is recommended that the size of each data packet be limited to 1358 bytes.
Service specific parameter of the
write command. If the Socket service is configured as UDP endpoint
this parameter is mandatory and specifies the IP address (in dotted format) and the UDP port of the remote host.
For each write request another IP address and UDP port may be given. See example in Section
.
0...1358
Confirmed number of data bytes which can be transmitted via the Internet ser-
vice configured in
. This number may be less or equal to the
value requested with
. The application has to deliver
exactly the number of bytes indicated by
. A 0 value
means that no data can be written at this time, i.e. it serves as a flow control
mechanism.
Number of data bytes already sent but not yet acknowledged at the TCP layer.
The value is constantly changing until the entire upload job has completed. If the value equals 0 all data sent so
far is acknowledged.
includes the
value of the pending write operation. Therefore, the very first
write operation of an upload job returns identical values for
and
This mechanism allows the host application to easily verify whether or not the remote host has successfully
received the data.
Parameter is not applicable to Socket with UDP protocol. For these services the counter is always set to 0.
1
The service is ready to accept new user data.
Notes
• Do not send any characters after
command line termination(
" URC is received.
This is necessary to avoid that any characters related to the AT command can be interpreted as being part of
the data stream to be transferred. Also refer to Section
• Enter
, e.g. AT^SISW=4,20, then received response that 20 bytes
can be sent(indicated by
), at this time, the data will be sent when you enter data size
is reached 20, and the excess input will be truncated.
• If you want to terminate an upload data stream, after the last
command, you will receive "
:
x, 1", then the service can be closed with
<Udp_RemClient>
(str)
<cnfWriteLength>
(num)
<unackData>
(num)
<urcCauseId>
(num)