User`s guide

RN-WIFLYCR-UG
www.rovingnetworks.com Version 1.2r 4/30/13 page 55
3.2.5.1 IDLE TIMER
The idle timer ensures that the client associated with the WiFly module’s AP network
is not lost or unresponsive. If there is no interaction between the configuration web
server and the client’s web browser for five minutes (default value), the WiFly module
reboots to the boot image. To restart the configuration web server, you must invoke it
in software or hardware as described previously.
The timeout defaults to five minutes (300 seconds) and is configurable via the following
command:
set comm idle <seconds>
3.2.5.2 BROWSER DISCONNECT TIMER
This timer is used to recover from an unexpected situation in which the configuration
web server on the WiFly module becomes unresponsive to the requests sent out by the
web browser.
The web browser periodically sends requests to the configuration web server. If the
WiFly module does not receive a request within 60 seconds, it assumes that the con-
figuration web server has become unresponsive and it reboots itself into configuration
web server mode. Then, you must re-associate your device with the WiFly module’s AP
network and refresh the web page.
3.3 PUTTING THE MODULE TO SLEEP & WAKING IT
Tabl e 3-5 describes the methods for putting the module to sleep.
Tabl e 3-6 describes the methods for waking the module.
TABLE 3-5: METHODS FOR PUTTING THE MODULE TO SLEEP
Method Interface Description
sleep command UART Go into command mode using $$$ and issue the sleep command.
Sleep timer Internal RTC The module sleeps based on the set sys sleep <value> command setting.
Drive GPIO8 high GPIO8 The module sleeps as soon as GPIO8 is held high (4 µs latency). To enable this
feature, use the set sys trigger 0x20 command setting.
TABLE 3-6: METHODS FOR WAKING THE MODULE (SHEET 1 OF 2)
Method Interface Description
Sensor input
(1.2-V DC only)
Sensor pins You can wake the module using sensor pins 0 - 3 (1.2-V DC ONLY). Use the set
sys trigger <value> command to enable the sensors.
Rx pin
(3.3-V DC only)
RX pin via
sensor 0
The RX pin on the RN-134 and the RN-174 evaluation boards is tied to sensor
pin 0 via a resistor divider network. Use the set sys trigger 1 command to wake
the module when it receives RX data.
NOTE: With this method, the module may drop the first UART data byte. A better
method is to wake the module using the CTS pin.
CTS pin
(3.3-V DC only)
CTS pin via
sensor 1
The CTS pin on the RN-134 and the RN-174 evaluation boards is tied to sensor
pin 1 via a resistor divider network. Use the set sys trigger 2 command to wake
the module using the CTS pin.