An early adopter of mobile payments with Apple (AAPL) Pay, Starbucks (SBUX) shows how the Internet of Things can connect customers to their coffee — which has Starbucks’ stock percolating near a new potential buy point. Using the coffee giant’s Mobile Order & Pay technology, customers can order drinks on a smartphone for in-store pick-up. In August, mobile payments made up an estimated 21.6% of total sales.