iOS Hardware as a Sensor Platform: DMM Case Study Daniel Brateris Dwight Bedford, David Calhoun, Aaron Johnson, Atlanticus Innovations Nickolas Kowalski, Kelli Martino, Thomas Mukalian, 1082 Sky Hill Road Justin Reda, Anthony Samaritano and Robert R. Krchnavek Bridgewater, New Jersey 08807 Rowan University Email:
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[email protected] Abstract—iOS is Apple’s mobile operating system and is communication hardware and functional user interfaces. In presently used on the iPhone, iPad, and iPod Touch. The hard- this context, an accessory is an attachment to the iOS hard- ware platforms associated with the iOS operating system provide ware. The attachment can be physical through the 30-pin a powerful platform for sensor applications. In this paper, we provide a case study on the development of a digital multimeter dock connector (UART serial data transfer or USB 2.0 data (DMM) using an iPod Touch. The DMM case study addresses the transfer) or virtual through a wireless (Bluetooth) connection major subsystems (hardware, software, and firmware) of a typical [2]. The accessory would contain the sensing elements as sensor platform and specific advantages of implementation using well as associated hardware. The designer can focus on the an iOS device. development of the electronics and instrumentation within the accessory. Once data is digitized or the control process can I. INTRODUCTION accept digital commands, then the device can be hooked up An embedded sensor system can often utilize a relatively to an iOS device to exchange data and be configured and simple, low-cost microcontroller to achieve the required mea- controlled.