I want to control a on board LED (High/Low) from openwrt console ... How to do that. Please help.
it's device specific, you'll need to figure the exact path yourself.
in the end there should be a file called trigger, cat it, to see the available options.
Here I followed this tutorial:
By doing so am able to change the state of the LED in software but physical pin remains Low all the time. Always the voltage of the pin is 0v.