Hi everyone, first of all i have to say I'm very noob on arduinos, but i could do some stuff.
My question is regarding a LCD display, it's connected to a battery and it have to run for 24 hours non stop, and i don't think the battery will work for 24 hours, so i want to turn off the lcd after the message is displayed.
There is any way to do that? turn off the power from the hardware?
I've allready tried the sleep mode but turn off the entire arduino and then my antena stops working.
Please help 
Thanks very much!!