VitalWell VW801, User Manual, Page: 8 / 42

VW801, VW802, VW803, VW804 Serial-WiFi Modem User Manual
Vitalwell Electronics (Zhuhai) Pte. Ltd. www.vital-well.com
email: Vitalwell@vital-well.com 6
Figure 4. VW801 AP+STA Network Structure
When VW801 modem enables AP+STA function, Modem ’ s STA interface can connect with router and
then connect to TCP server in the network. At the same time, module ’ s AP interface is also active and
allow phone/PAD to connect it through TCPB, then phone/PAD can control / communicate with VW801
and other devices within the network.
The advantage of AP+STA mode is:
 Users can easily control user device through Phone/PAD, and no need changing the original network
setting.
 Users can easily setting modem ’ s parameters through WiFi when module works as STA mode.
2.2. Operate Mode : Transparent Transmission Mode
VW801 modem support serial interface transparent transmission mode.
In this mode, VW801 functions as a serial<->WIFI bridge, gives user a wireless serial port over WIFI.
Users just only configure the necessary parameters. After power on, the modem will automatically
connect to the default wireless network / server.
When in this mode, the modem's serial port always work in the transparent transmission mode, users
can think it as a virtual wireless serial cable, and can send and receive data as usual like using a simple
wired serial cable. In other words, the original serial cable on devices is directly replaced with the
modem; user devices can then be easily converted to wireless enabled devices without any changes.
The transparent transmission mode will fully compatible with user ’ s original software platform and
reduce the software development effort for integrate wireless data transmission.
The parameters which need to configure include:
 Wireless Network Parameters
 Wireless Network Name （ SSID ）
 Security Mode
 Encryption Key