Cermetek Microelectronics, Inc Page 16 of 42
Document NO. 607-00xx Revision A (12/13)
This dual network mode is activated by enabling both the Access Point and Station functions on the
CH232BGN. The CH232BGN Station Interface connects to the router and then to the TCP server in
the network. At the same time the CH232BGN Access Point interface is also active. This permits a
mobile phone or tablet to connect to the module through a secondary TCP connection for remote
access to module parameters.
The advantages of Access Point plus Station mode include:
Users can easily control and track the user device through a mobile phone or tablet without
affecting the network settings.
Users can modify module parameters over the WiFi connection.
Access Point plus Station Mode Setting:
The serial command below enables Access Point plus Station Mode:
AT+FAPSTA=on
Notes:
When user enables Access Point and Station Modes, the Station port must maintain a
connection with the other Access Point to prevent data loss. If the Station port cannot
maintain the connection, disable the Station Scan with the commands below:
AT+STTC=on/off
,
“on” selects Access Point scanning; “off” disables Access Point
scanning: This command is not saved when the module is restarted.
AT+FSTTC=on/off
;
“on” selects Access Point scanning; “off” disables Access Point
scanning: This command is saved when the module is re-started.
2.2. Auto- Frequency Function
When module works as a Station, CH232BGN adjusts the wireless communications channel to
maintain the same channel as the associated Access Point. When the module works as an Access
Point and the Auto-frequency function is enabled, the CH232BGN will select the optimal wireless
channel based on the environment on boot-up, it will select the optimal wireless channel based on the
surrounding environment.
2.3. Security
CH232BGN module supports multiple wireless encryption protocols, and enables them to protect user
data transmission, the protocols include:
WEP
WPA-PSK/TKIP
WPA-PSK/AES
WPA2-PSK/TKIP
WPA2-PSK/AES
