""So get two arduinos, connect Rx on one to Tx on the other, and vice versa for the second part, and connect the grounds.""
hey thanks so do i upload the sketch to both arduinos? and then connect them together? using the rx/tx? so one arduino will send data to the other? so if do a sketch to send binary data to second arduino I should see led's light up as inputs and should see the result in second arduino as outputs? so many tutorials outhere I just can't find one that will really help with this particular setup? thanks