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...	...	@@ -36,4 +36,12 @@
36	36	**cat  /sys/class/gpio/gpio18/value**  ~/~/ Get GPIO18 value if set input
37	37	)))
38	38
	39	+(% class="box infomessage" %)
	40	+(((
	41	+**Control a GPIO already exported as SYSTEM LEDs .**
	42	+**echo 1 > /sys/class/leds/dragino2\:red\:system/brightness**  ~/~/ Turn On LED dragino2:red:system
	43	+**echo 0 > /sys/class/leds/dragino2\:red\:system/brightness**  ~/~/ Turn off LED dragino2:red:system
	44	+)))
	45	+
	46	+
39	39	Reference: [[http:~~/~~/www.avrfreaks.net/wiki/index.php/Documentation:Linux/GPIO#gpio-sysfs>>url:http://www.avrfreaks.net/wiki/index.php/Documentation:Linux/GPIO#gpio-sysfs]]