2169-3536 (c) 2018 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/ACCESS.2019.2897845, IEEE Access Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000. Digital Object Identifier 10.1109/ACCESS.2017.DOI Pervasive and Personalized Ambient Parameters Monitoring: A Configurable, Prolonged and Independent watch MOSTAFA HAGHI 1 , (Student Member, IEEE), REGINA STOLL 2 , AND KERSTIN THUROW. 1 , (Member, IEEE) 1 Center for Life Science Automation, Rostock University, Rostock 18119 Germany (e-mail: mostafa.haghi, kerstin.thurow@celisca.de) 2 Institute of Preventive Medicine, Rostock University, Rostock 18055 Germany (e-mail: regina.stoll@med.uni-rostock.de) Corresponding author: Mostafa Haghi (e-mail: mostafa.haghi@celisca.de). TThis work was funded by the Ministry of Economics, Employment and Health of government of Mecklenburg Vorpommern (Germany) under project number MV (TBI-V-1-127-VBW-044). ABSTRACT An innovative, small, compact, light-weighted, configurable and low power consumption wrist-worn device in the area of ambient parameters monitoring, in five physical layers is introduced. The prototype is based on multi-layer multi-sensor (MLMS) approach and is capable of measuring wide range of toxic/hazardous gases, physical ambient parameters and motion tracking. The proposed device operates in standalone (BLE disconnected) and configurable (BLE connected) mode. In standalone mode, real-time data monitoring on display and data storage in an integrated external memory are supported. The logged data are retrieved, once BLE is resumed based on user decision. In configuration mode, sensors are activated and configured by user via sending command from the smartphone. The chemical parameters monitoring includes three hazardous gases (SO 2 ,NO 2 ,CO- one at each time). The toxic gas sensor along with the gas sensor driver forms the gas sensor node, which is located at the top of the proposed device. Hardware flex interface is utilized as the second layer to facilitate the display and sound module connection to the host platform. The main platform, hosts the integrated sensors, micro controller and antenna that is extended from both sides in z axis. Notification driver for the early user warning of abnormal status and battery holder are placed at the bottom of the device in two separate layers. Furthermore, the adjustable sensor sampling rate according to the battery level is applied for power management. Data storage and power dissipation also are discussed in detail at the end of this work. INDEX TERMS Ambient monitoring, configuration, health-care, independent operation, power consump- tion, variable sampling rate, Wearable device. I. INTRODUCTION A. WEARABLE DEVICES AND LIFE QUALITY N OWADAYS smartphones are widely used and applied in many applications. This can not be ignored since smartphones make the life easier by providing large flavors of facilities. However, the penetration rate of smartphones in the current lifestyle is saturating [1], [2]. Due to the current number of sensors included in the smartphone (e.g. for measuring physiological data) their use for health-care protection for elderly people is limited; additional sensors for data collection are required which have to be coupled to the smartphone [3], [4]. On the other hand, we are observing a fascinating new trend in the mobile device market which is supported by increasing demands. Individuals show an increasing interest in wearing a mobile device daily, that improve the quality of life in the way that smartphones can not achieve [5], [6]. Smart watches, smart textile, smart glasses and wrist bands are some of the mobile devices that are used by people during typical daily activities [7]. These devices are referred to as wearable devices or in short, "wearables". Wearables can sense, measure, collect and monitor physiological/non-physiological [8] or, ambient parameters [9], [10], can provide localization and navigation [11], [12], physical and mental health observation [13], [14], sport analytic [15], and medical insurance analytics [16], [17] in a 24/7 manner and provide the opportunities of a better quality of life [1]. These collected data more often are sent to a gateway (here PDA) and some cases consequently to a VOLUME 4, 2016 1