Search Function For Sta; Address Binding; Uart Frame Scheme; Uart Free-Frame - Jinan USR IOT Technology WIFI232-A User Manual

4.5.3 Search Function for STA

When using web configuration STA Interface Setting Page, user can push "Search" button to find
surrounding AP, and find a AP to associated.

4.5.4 Address Binding

USR-WIFI232-A/B/C module supports the feature of binding the BSSID address of target network.
According to the provisions of 802.11 protocol, different wireless networks can have a same
network name (i.e. SSID / ESSID), but must correspond to a unique BSSID address (i.e. MAC
address). Illegal intruders can create a wireless network with the same SSID / ESSID, it will make
STAs in the network to join to the illegal AP, thereby and then network leakage happen.
Users can prevent STA from joining to illegal network by binding the BSSID address, to improve
wireless network security.
4.6 UART 4.6 4.6 4.6 UART UART UART Frame Frame Frame Frame Scheme

4.6.1 UART Free-Frame

USR-WIFI232-A/B/C support UART free-frame function. If user select open this function, module
will check the intervals between any two bytes when receiving UART data. If this interval time
exceeds defined value (50ms default), USR-WIFI232-A/B/C will think it as the end of one frame
and transfer this free-frame to WiFi port, or USR-WIFI232-A/B/C will receive UART data until 4K
bytes, then transfer 4KB frame to WiFi port.
USR-WIFI232-A/B/C's default interval time is 50ms. User can also set this interval to fast (10ms)
through AT command. But user have to consider if user MCU can send UART data with 10ms
interval ,or the UART data may be divide as fragment.
Jinan USR IOT Technology Limited
USR-WIFI232-A/B/C User Manual
Figure 29
Scheme Scheme Scheme
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