User manual

WiFly GSX/EZX
www.rovingnetworks.com WiFly-RN-UM 11/9/2011
809 University Avenue • Los Gatos, CA 95032 • Tel [phone] • [e-mail]
~ 7 ~
Type $$$ in the terminal emulator. You should see CMD returned to you. This will verify that your cable
and comm. settings are correct. Most valid commands will return an AOK response, and invalid ones will
return an ERR description.
To exit command mode, type “exit“<cr>.
NOTE: You can enter command mode locally over the UART interface at any time when not connected,
and also when connected if the appropriate settings are enabled.
When the WiFly GSX module is powered up, it tries to auto associate to the Access Point stored in the
config settings. If for some reason the module cannot find the Access Point, by default it goes into auto
association mode and gets busy scanning and trying to join a network. This may cause the UART to become
unresponsive for a brief amount of time and you may lose the data sent to the module while the module is in
this “not associated” state making it difficult to get into command mode and configure the module
Firmware version 2.21 and later fixes this issue. The auto-join feature is disabled when in command mode.
This makes it easy to configure the module. Auto-join will re-enable when you exit out of command mode.
The auto join feature can be disabled by setting the set wlan join 0. This will prevent the WiFly GSX
module to attempt to associate to a network that does not exist.
Another alternative is to boot the module in adhoc mode by using the PIO9 adhoc/factory reset jumper. If
this is high on power up, the module will not associate to any network; it will use the temporary adhoc
mode. When in adhoc mode, you can configure the network settings.
3.2. Remote configuration using ADHOC mode
Using adhoc mode to configure the device eliminates the need for the module to be associated with a
network access point. In adhoc mode the module creates it own “on demand” network that you can
connect to via your computer like you would to any other network.
To enable adhoc mode via hardware set PIO9 high (3.3V) at power up. On the RN-134 development board,
GPIO9 is on the J1 jumper block. On the RN-174 development board, GPIO9 is on the J8 jumper. When the
module powers up with PIO9 set high, the WiFly module creates an adhoc network with the following
SSID: WiFly-GSX-XX, where XX is the final two bytes of the devices MAC address
Channel: 1
DHCP: OFF
IP address: 169.254.1.1
Netmask: 255.255.0.0