To begin, [Malebuffy] knew he would need a way to display the ... fuel flow sensor. The Arduino processes the data and then transmits it to a smart phone via a Bluetooth module.

Arduino boards get a Bluetooth Smart dev kit from Nordic ... Shields are available from many manufacturers and fulfill tasks such as sensors, motor-driving circuitry, LCD display, Wi-Fi, Bluetooth ...

Since just about everyone who would be interested in electronics has a decent cellphone now, there’s an idea that we don’t need USB or weird serial adapters anymore. Bluetooth LE is good ...