HF-A11 modules support serial interface transparent transmission mode. The benefit of this
mode is achieves a plug and play serial data port, and reduces user complexity furthest. In this
mode, user should only configure the necessary parameters. After power on, module can
automatically connect to the default wireless network and server.
As in this mode, the module's serial port always work in the transparent transmission mode, so
users only need to think of it as a virtual serial cable, and send and receive data as using a simple
serial.
The transparent transmission mode can fully compatible with user’s original software platform
and reduce the software development effort for integrate wireless data transmission.
Notes:
1.The WIFI module HF-A11 module is using the COM3 port of the EXM WIFI unit
2.The communication parameters is fixed. Baud rates:9600; Data bits:8 Parity:None Stop:1;
3.The data transmission protocol for COM3 is the MODBUS TCP
Basic Wireless Network Based On AP (Infrastructure)
Infrastructure: it’s also called basic network.It built by AP and many STAs which join in.
The characters of network of this type are that AP is the center, and all communication between
STAs is transmitted through the AP. The figure following shows such type of networking.
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