now when you press a button on the cart you notify the product launchpad about your presence;
then the product launchpad always sends packets to you;
this allows the use of multiple carts with only a single product
when you cash out, instead of sending many packets, you can aggregate multiple products in the same packet, doing an array; thus you have better power efficiency, and less delay; so both Anastasi and Marcelloni would be very proud of us
