Sierra Wireless WISMO218 User Manual download pdf (Page 53)

WA_DEV_W228_UGD_002 Rev 003 Page 53 of 78

WISMO228 TCP/IP AT Commands

Manual

In the schematic above, a TCP socket is connected. On the transmitting side, data and [ETX] is sent

(use case: Desktop PC1 is a WISMO

which sends data to PC2 which is either a PC or also a

WISMO

), and the data is received on PC2 and the [ETX] character shuts down the socket on the



ndication is received

indicating that no more data can be sent by PC1 but can read data sent from PC2.

There are different indications received for shutdown and reset for a TCP socket. When a TCP socket

is reset, [ETX] character is sent on the UART to indicate the end of communication. The UART



can therefore be distinguished by the indications received on the UART.

Mapping/Unmapping of a Mapped UDP and TCP Socket

When a TCP socket is unmapped and still active, it is possible to map it again in another mode which

is different from the previous one without closing the TCP socket.

r the

sequence or by sending an AT+WIPDATA=<proto>,<index>,0 on another UART in AT mode. This

applies to both UDP and TCP protocols.

When +++ is issued, the WISMO

switches from DATA mode to AT mode. If ATO command is used

to switch the WISMO

back to DATA mode, and:

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Sierra Wireless WISMO218 User Manual Page 53