WIFLY GSX WIFLY EZX

WiFly GSX/EZX
www.rovingnetworks.com WiFly-RN-UM 4/8/2011
10.5.1. Setting the alternate GPIO functions
The default functions of GPIO 4 5, 6 is to control the LED functionality. This default functionality can be
overridden to allow user programmable IO or alternate IO functionality by using the set sys iofunc
command. Value is entered as a hex number.
The hex value represents a bit mask that controls each bit in the represents a particular GPIO pin.
If a bit is 0, then that GPIO is driven/read by the firmware per the default function.
The IO function is encoded as such:
Bit IO DIRECTION Function
0 GPIO-4 output Disable LED function so IO can be used as GPIO
1 GPIO-5 output Disable LED function so IO can be used as GPIO
2 GPIO-6 output Disable LED function so IO can be used as GPIO
3 Not Used
4 GPIO-4 output HIGH once associated/authenticated and have IP address.
5 GPIO-5 input Set HIGH to trigger TCP connection, LOW to disconnect.
6 GPIO-6 output HIGH when connected over TCP, LOW when disconnected.
NOTE. Bits 0-3 are mutually exclusive with the bits 4-6. i.e. 0x77 is an illegal value.
If the LEDs are disabled using bits 0, 1, 2 above, you can then use the show i command to read these GPIO.
show i will return
Port=30
For example, to use the alternate functions of the LEDs, the sequence of commands would be:
set sys iofunc 0x70 // enable alternate function for GPIO 6, 5 and 4
save
// store configuration
reboot
// reboot the module
NOTE: Currently, the alternative GPIO functions are not available in adhoc mode.
10.5.2. Controlling connections with GPIO
In embedded applications it is useful to monitor and control the status of the TCP/IP connection. This can
be done by enabling the alternate function of GPIO 4, 5 and 6.
With the alternate function for these GPIO set, the module will connect to the stored remote host IP address
and port when GPIO-5 is driven high and disconnect when driven low.
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