Sierra Wireless WISMO218 User Manual download pdf (Page 55)

WA_DEV_W228_UGD_002 Rev 003 Page 55 of 78

WISMO228 TCP/IP AT Commands

Manual

set for option WIP_NET_OPT_TCP_MIN_MSS and

AT_WIP_NET_OPT_PREF_TIMEOUT_VALUE will be used.

Note: Any attempt made to set the data packet size to more than twice the value of

WIP_NET_OPT_TCP_MIN_MSS using the +WIPDATA command results in “+CME ERROR: 847”.

The data sent to a mapped TCP socket through the UART will be buffered before being sent to the

peer. This buffered data will be sent to the peer when the:

 total amount of buffered data is twice or more than the preferred segmentation size. The

preferred segmentation size is co

(WIP_NET_OPT_TCP_MIN_MSS) or the +WIPDATA command.

 



 socket is unmapped, shut down or closed.

In some scenarios, there might be a segmentation of data packets because of timer expiration, network

problems, etc. Thus, a single packet of data may be received in more than one packet at the peer.

Packet Segmentation in UDP Sockets

This feature for UDP is supported only in case of continuous transparent mode. If the +WIPDATA



parameters used for packet segmentation can be configured using the +WIPDATA command. In case

they are not configured using the +WIPDATA command, the default value of these parameters will

be used.

In some scenarios, there might be a segmentation of data packets because of timer expiration, network

problems, etc. Thus, a single packet of data may be received in more than one packet at the peer.

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Sierra Wireless WISMO218 User Manual Page 55