The twelfth annual IEEE SECON conference will provide a unique forum to exchange innovative research ideas, recent results, and share experiences among researchers and practitioners in the field of sensing and communication in wireless networks. The focus of SECON is novel communication technologies and emerging applications and services, involving mobile sensing and communication, cyber-physical systems, and ubiquitous and pervasive computing. SECON 2015 will be held on June 22-25, 2015, at the EdgeWater Hotel, 2411 Alaskan Way, Seattle, WA 98121.