B&B Electronics WLNN-EK-DP551 - User Manual - Manual (Page 54)

B&B Electronics
54
Airborne Enterprise WLNN EVB Users Guide
13.0 Indicator LED
’s
The Airborne Evaluation Board includes a set of indicator LED ’s that provide important
feedback on the state of the module and its ability to communicate with the network.
Understanding these LED
’s can help not only in debugging the evaluation board but also
on deciding how you will implement them in your design.
Table 51 provides a description of the normal LED sequence and the module state for the
combinations of these LED
’s. The table also provides some possible causes for failure and
suggests appropriate remedies.
TABLE 52 - INDICATOR LED STATUS DESCRIPTION
LED Configuration State Description
Evaluation Board is
OFF
No power has been applied to the evaluation board
and SW1 is in the OFF state.
Evaluation Board is
powered
The power has been applied to the Evaluation board
and SW1 is in the ON position. The Airborne Device
Server Module has initiated the boot cycle.
The boot cycle may take 10-12 seconds.
802.11 radio is
enabled and searching
for a wireless network
When the RF_ACT# LED starts to blink the Airborne
Device Server Module has enabled the radio and it is
actively scanning for a wireless network that matches
the installed configuration. The RF_ACT LED will
continue to blink until a network has been found.
802.11 network located
and radio is attempting
to associate
The Airborne Device Server module has located a
wireless network that matches its installed
configuration and has initiated authentication.
The RF_ACT# LED turning solid can happen both
before and after the POST LED turning ON.
If authentication fails the LED will return to blinking
after several seconds.
Airborne Device Server
Module has passed
Power-on Self Test
(POST)
The Airborne Device Server Module has passed POST
and has started to run network and device services.