Technical information

May 31, 2008 AT+i Commands Reference Manual D-1
Appendix D: Use Cases
Use Case - Host Mode
W24 supports a Host Mode functionality, when it is connected to an external host
(terminal/controller) (see Figure D-1).
In this mode, the W24 supports two physical connections to a host for two different networks, in
spite of the W24 doesn't support several network connections simultaneously. A host uses
dynamic switching between the two supported in the W24 networks: WiFi and Cellular
(GSM/GPRS). The switching will be done via AT+I commands interface.
For example: when the host lost a connection (coverage problem etc.), it is able to switch itself
dynamically to another network for Internet connection. It is a simple variant of seamless network
connectivity.
Figure D-1: External Terminal/Host Data Mode
The mode configuration
In order to use the WLAN platform W24 must be notified to switch communication platforms:
UART
USB/H
UART#1
USB/D
GPIO
IGN,ON/OFF
CTL
Mic,SPK
Audio
W24
GPIO
SIM
SIM
UART#2
USB/H
UART#0
SPI
UART#1
G24
USB/D
UART#2
UART
Cellular
Network
WiFi
Network
Host