User manual

WiFly GSX
www.rovingnetworks.com WiFlyGSX-um 7/16/2010
809 University Avenue • Los Gatos, CA 95032 • Tel [phone] • [e-mail]
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In TCP-Client mode, the auto-conn timer is used as a connect out timer. If set, the device will automatically
attempt a connection when the timer expires.
set sys autoconn <secs>
In TCP-Client AND TCP-Server mode, there is also a disconnect timer.
set comm idle <secs> sets the idle disconnect timer. This causes a disconnect if no transmit or receive data
is seen.
10.2. Wake on Sensor Input
SENSE 0 to 3 inputs are available to wake the module from sleep.
SENSE 0 to 3 pins have a small current source that is activated in sleep mode. This source is approximately
100nA, and will cause the input to float up to about 1.2VDC. If SENSE1 for example, is enabled, pulling
the SENSE1 pin to GROUND will wake the device.
To enable these inputs to wake the module, use the command set sys trigger <value>. The value is a bit-
mapped setting. To wake on sensor pin 2, use set sys trig 4, for example. Setting the value to 0 disables all
sensors pins.
Sensor inputs are rated 1.2VDC maximum. You must use a resistor divider when driving a sensor pin from
the other 3V pins such as RX. A resistor divider network with a minimum of 24K in series and 10K to
ground from the UART RX or CTS pin should be used.
WARNING: Under no conditions should the voltage on any sensor input exceed 1.2VDC. Permanent
damage to the module will result.
An open drain FET is a good device to tie to the SENSE pin. The threshold is about 500mV. Additional
pullup to 1.2VDC may be used if the circuit has an impedance (due to leakage current) of less than 5Mohms
(500mv / 100nA). SENSE 0 to 3 pins that are not used should be left unconnected.
10.3. Wake on UART
When the module is in sleep mode, the UART itself is disabled. However, wake on UART can be
accomplished by connecting the SENSE1 pin to the RX data pin. (Using the appropriate divider resistors
mentioned above)
The SuRF board (RN-134) has a built in resistor divider connecting SENSE 0 and SENSE 1 to RXD and
CTS to allow waking up the module.
Note: On SuRF board rev 2 the resistor pack connecting RX and CTS signals is not correctly connected to
the sensors. To wake on UART RX place a jumper from pin 3 on the Evaluation board header to pin 2 on