User's Manual

HF-A21-SMT Embedded WiFi Module User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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As showing in the figure below, HF-A21-SMT (1) can be treat as an AP, and HF-A21-SMT (2),
HF-A21-SMT (3) and the laptop are STAs connected to HF-A21-SMT (1). Meanwhile, all HF-A21-
SMT modules can connected to user device via UART interface. All HF-A21-SMT modules can
be operated and managed through the laptop. So it is convenient to O&M all HF-A21-SMT
modules. Moreover, in such AP network structure, the whole coverage of a wireless network can
be extended easily.
Figure 16. HF-A21-SMT AP Network Structure
2.1.3. Wireless Network Based On AP+STA
HF-A21-SMT module support AP+STA network mode, means module support one AP interface
and one STA interface at the same time, as following figure,
Figure 17. HF-A21-SMT AP+STA Network Structure