hi! firstly, thanks a lot for the interest. secondly, all i have to do is a sensor that check whenever a person passes between an IR led and the receiver, using only one arduino and keeping the RX and TX pins free. any advice?
hi! firstly, thanks a lot for the interest. secondly, all i have to do is a sensor that check whenever a person passes between an IR led and the receiver, using only one arduino and keeping the RX and TX pins free. any advice?