I have the TP-LINK TL-WR1043ND router with OpenWRT 14.07 Barrier Breaker installed.
I would like to know how often and for how long my 3-year-old kid is watching YouTube through his Samsung tablet, while I am not at home. I need to know whether the babysitter is giving him the tablet all day long, or just occasionally when he is eating, for example.
So at the end I would like to have historical statistics for when the device was actively using the internet (not some background traffic). Is it possible to do it?