android-volume

#!/bin/bash

KEYCODE_VOLUME_DOWN=114
KEYCODE_VOLUME_UP=115

keypress() {
    adb -d shell "
    dev=\$(getevent -p | grep gpio-keys -B1 | grep -o '/dev/.*')
    sendevent \$dev 1 $1 1 &&
    sendevent \$dev 0 0 0 &&
    sendevent \$dev 1 $1 0 &&
    sendevent \$dev 0 0 0
    "
}

if [ "$1" == "up" ]; then
    keypress $KEYCODE_VOLUME_UP
fi

if [ "$1" == "down" ]; then
    keypress $KEYCODE_VOLUME_DOWN
fi