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Created page with "==General== ==Hardware== ===How to Control fitlet2 front LEDs?=== fitlet2 has 2 LEDs, LED1 and LED2. Each of them has GREEN and YELLOW parts that can be controlled separate..."
==General==
==Hardware==
===How to Control fitlet2 front LEDs?===
fitlet2 has 2 LEDs, LED1 and LED2. Each of them has GREEN and YELLOW parts that can be controlled separately.
In Linux kernel there are 4 related GPIOs: GPIO435, GPIO436, GPIO437, GPIO438.
*GPIO435 - LED1 GREEN
*GPIO436 - LED1 YELLOW
*GPIO437 - LED2 GREEN
*GPIO438 - LED2 YELLOW
To control the GPIOs need to login as root (root password required):
$ su
Password:
To control for example LED1 GREEN part:
$ echo 435 > /sys/class/gpio/export
$ echo out > /sys/class/gpio/gpio435/direction
$ echo 1 > /sys/class/gpio/gpio435/value
# LED1 should be GREEN now
$ echo 0 > /sys/class/gpio/gpio435/value
# LED1 should be OFF now
$ echo 435 > /sys/class/gpio/unexport
The GPIO framework and GPIO sysfs interface are documented in
https://www.kernel.org/doc/Documentation/gpio/gpio.txt
==software==
[[category:fitlet2]]
[[category:FAQ]]
==Hardware==
===How to Control fitlet2 front LEDs?===
fitlet2 has 2 LEDs, LED1 and LED2. Each of them has GREEN and YELLOW parts that can be controlled separately.
In Linux kernel there are 4 related GPIOs: GPIO435, GPIO436, GPIO437, GPIO438.
*GPIO435 - LED1 GREEN
*GPIO436 - LED1 YELLOW
*GPIO437 - LED2 GREEN
*GPIO438 - LED2 YELLOW
To control the GPIOs need to login as root (root password required):
$ su
Password:
To control for example LED1 GREEN part:
$ echo 435 > /sys/class/gpio/export
$ echo out > /sys/class/gpio/gpio435/direction
$ echo 1 > /sys/class/gpio/gpio435/value
# LED1 should be GREEN now
$ echo 0 > /sys/class/gpio/gpio435/value
# LED1 should be OFF now
$ echo 435 > /sys/class/gpio/unexport
The GPIO framework and GPIO sysfs interface are documented in
https://www.kernel.org/doc/Documentation/gpio/gpio.txt
==software==
[[category:fitlet2]]
[[category:FAQ]]
