[ACM Press the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the 2017 ACM International Symposium on Wearable Computers - Maui, Hawaii (2017.09.11-2017.09.15)] Proceedings of the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2017 ACM International Symposium on Wearable Computers on - UbiComp '17 - Lessons learned from designing an instrumented lighter for assessing smoking status