Demonstration of a joint power harvesting and communication technology for smartphone centric ubiquitous sensing applications
3.5mm Audio Interface, Frequency Shift Keying, Power Harvester, Smartphone, Ubiquitous Sensing
2016 13th IEEE Annual Consumer Communications and Networking Conference, CCNC 2016
With the popularization of smartphones, various smartphone centric ubiquitous sensing applications have emerged, which use a smartphone in conjunction with external sensors for data acquisition, processing, display, communication, and storage. Because smartphones do not have a universal data interfaces, many ubiquitous sensing applications use the earphone and the microphone channels of the 3.5mm audio interface for data communications so that they can work with different types of smartphones. The earphone channels of the 3.5mm audio interface can only send AC signal out of a smartphone, and hence DC power needs to be harvested from the earphone channels. In this demonstration, a joint power harvesting and communication technology to harvest double or more power from both earphone channels (instead of one earphone channel) without affecting data communications is demonstrated with a prototype system, which can power external a microcontroller and sensors through the 3.5mm audio interface of a smartphone, display sensor measurement results on the smartphone, and control the outputs of the microcontroller from the smartphone.
Original Publication Date
DOI of published version
UNI ScholarWorks, Rod Library, University of Northern Iowa
Nie, Hong; Joshi, Ranjana; and Li, Ziyuan, "Demonstration of a joint power harvesting and communication technology for smartphone centric ubiquitous sensing applications" (2016). Faculty Publications. 1099.