This page describes the GPIO functionality of the Flex RF module.

There are three general purpose IO pins on the Flex module that are configured for output and set on/off using the GPIO command. This is useful for switching LED’s on/off or interfacing with external circuitry.

The GPIO pins are Pin 3,4 and 5 (refer below diagram)

GPIO Default Setting

Each GPIO pin is configured for output and off by default.

How to use the GPIO command

Command: GPIO[p1][p2]
Response: GPIO[p1][p2]

p1 = A,B or C pin indicator from the above pinout diagram
p2 = 0 for off and 1 for on

The below example explains how to set GPIOA on:

python 03 GPIOA1 
SENT     : 03GPIOA1