wireless network and server each time. As in the auto mode, the module's serial always
work in the transparent transfer state, so users only need to think of the module as a virtual
serial cable, and send or receive data as using a simple serial. In other words, the serial
cable of users’ original serial devices is directly replaced with the module, user equipments
can be easy for wireless data transmission without any changes.
In this mode, the module supports the trigger length and trigger time of auto forming a
frame, Trigger length means that the module receives from the serial a specified length of
data,then forms a wireless data frame, and immediately start the network sending process.
Trigger time means, when the data received from the serial is less than the specified length,
the module will force to form a frame with the current data and start to send after the
specified time.
In this mode, the module serial supports hardware flow control, provides normal RTS
/CTS signals, it’s strongly recommended when doing large amounts of data, hardware flow
control should be enabled, so as to fully ensure reliable data transmission. In the
applications which doesn’t need flow control, users can simply leave RTS / CTS pin vacant.
2.3.3
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Command Mode of Serial
Module also provides the command mode based on serial control, which is different
from auto-work mode,this mode provides the user with sufficient flexibility, and meet users’
specific needs of different applications.
In this mode, the module works according to user command through the serial, user
can control the module completely with the command, including modifying parameters,
controling networking, controling TCP/IP connection and data transmission. This is a
high-level use, and also the most flexible to use. Users can discretionarily control the
connection and disconnection of the wireless network with command, also can create
several different types of TCP / IP connections at the same time and keep them transfering.
However, this model also requires the user has full understanding of control protocol of the
module's AT+Instruction set, and have a basic use knowledge of wireless network and
TCP/IP network.
This module beds a set of AT+Instruction used for system control and parameter
configuration command (see Article VI), all instructions are based on ASCII code, using
Windows Super Terminal program can directly control module with command, it’s
convenient for debugging and using.
2.3.4
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TCP/IP Protocol stack
This module contains a complete TCP / IP protocol stack, and it supports the TCP/UDP
