We present WEARDA, the open source WEARable sensor Data Acquisition software package. WEARDA facilitates the acquisition of human activity data with smartwatches and is primarily aimed at researchers who require transparency, full control, and access to raw sensor data. It provides functionality to simultaneously record raw data from four sensors -- tri-axis accelerometer, tri-axis gyroscope, barometer, and GPS -- which should enable researchers to, for example, estimate energy expenditure and mine movement trajectories. A Samsung smartwatch running the Tizen OS was chosen because of 1) the required functionalities of the smartwatch software API, 2) the availability of software development tools and accessible documentation, 3) having the required sensors, and 4) the requirements on case design for acceptance by the target user group. WEARDA addresses five practical challenges concerning preparation, measurement, logistics, privacy preservation, and reproducibility to ensure efficient and errorless data collection. The software package was initially created for the project ``Dementia back at the heart of the community'', and has been successfully used in that context.

翻译：我们提出WEARDA——开源的可穿戴传感器数据采集软件包。WEARDA支持通过智能手表获取人体活动数据，主要面向需要透明度、完全控制权及原始传感器数据访问权限的研究人员。该软件可同时记录四类传感器的原始数据——三轴加速度计、三轴陀螺仪、气压计和GPS，这将使研究人员能够例如估算能量消耗和挖掘运动轨迹。选择搭载Tizen操作系统的三星智能手表的原因包括：1）智能手表软件API具备所需功能；2）软件开发工具及文档的可获取性；3）配备所需传感器；4）外壳设计符合目标用户群体的接受要求。WEARDA针对准备、测量、物流、隐私保护及可重复性五大实践挑战提出解决方案，以确保高效且无差错的数据采集。该软件包最初为“让痴呆症回归社区核心”项目创建，并已在相关场景中成功应用。