Turn off a LED

curl -v "beaglebone.local:3001/USR0?state=0"
curl -v "beaglebone.local:3001/USR1?state=0"

Turn on a LED

curl -v "beaglebone.local:3001/USR0?state=1"
curl -v "beaglebone.local:3001/USR1?state=1"

Toggle a LED

LED USR2 is configured so that every request toggles it's value.

curl -v "beaglebone.local:3001/USR2"