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Control Gateway GPIOs & LEDs

Version 10.1 by Edwin Chen on 2022/05/07 11:24
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ModelPhoto
LHT65NLHT65N_00.jpg
  

Control LEDs & GPIOs

OpenWrt Base OS

Control a General GPIO:

echo 18 > /sys/class/gpio/export     // Export gpio 18 so we can use it
echo "high" > /sys/class/gpio/gpio18/direction   //  Set direction to out and
set level to high. Use "low" to set direction to output and level to low

echo 0 > /sys/class/gpio/gpio18/value    // Set output to 0 or 1
echo "in" > /sys/class/gpio/gpio18/direction  // Set GPIO18 as input

cat  /sys/class/gpio/gpio18/value  // Get GPIO18 value if set input

Control a GPIO already exported as SYSTEM LEDs .
echo 1 > /sys/class/leds/dragino2\:red\:system/brightness  // Turn On LED dragino2:red:system
echo 0 > /sys/class/leds/dragino2\:red\:system/brightness  // Turn off LED dragino2:red:system

Reference: http://www.avrfreaks.net/wiki/index.php/Documentation:Linux/GPIO#gpio-sysfs